TY  - RPRT
AN  - 01131363
AU  - Edil, Tuncer B
AU  - Fratta, Dante
AU  - Shuettpelz, Craig C
AU  - University of Wisconsin, Madison
AU  - Wisconsin Department of Transportation
AU  - Federal Highway Administration
TI  - Development of Testing Methods to Determine Interaction of Geogrid-Reinforced Granular Material for Mechanistic Pavement Analysis
PY  - 2009/03//Final Report
SP  - 241p
AB  - A new method of examining soil stiffness based on the propagation of elastic waves is proposed and compared to traditional resilient modulus tests.  A laboratory testing program is undertaken to study the effect of changing bulk stress, strain level, and void ratio on the velocity of elastic waves.  Using a proposed formulation, low-strain (~0.000001 mm/mm) moduli calculated with seismic methods are converted to higher strain (~0.0003 mm/mm) resilient moduli.  Results of this study indicate that resilient moduli are approximately 29% that of the seismic moduli based on stress and strain.  A simplified seismic testing scheme that can be used on the soil surface was developed and provides an efficient method to compare seismic and resilient moduli.  The new proposed methodology allows for the characterization of materials containing large grains (>25 mm) (e.g., breaker run, pit run sand and gravel) that cannot be easily tested with the current resilient modulus methodology.  Soil modulus and particle rotation were monitored using micro-electronic-mechanical-systems to determine the aggregate-geogrid interaction in base course materials.  Velocity results indicate that the geogrid stiffens soil near the geogrid by a minimum factor of 1.3 (geogrid placed at a depth of 75 mm from the surface) to a maximum of 2.6 (geogrid at 100 mm depth).  Rotation tests show a "zone of influence" no more than 50 mm on both sides of the geogrid reinforcement; however, the "zone of influence" depends on the position of the geogrid.  Geogrid at 100 mm depth seems to be the most effective.  Comparisons made with available field geogrid reinforcement cases support these findings.
KW  - Base course (Pavements)
KW  - Elastic waves
KW  - Geogrids
KW  - Granular materials
KW  - Laboratory tests
KW  - Modulus of resilience
KW  - Seismic moduli
KW  - Soil stiffness
KW  - Test procedures
UR  - http://minds.wisconsin.edu/bitstream/handle/1793/53925/0092-07-05_final_report.pdf
UR  - http://wisdotresearch.wi.gov/wp-content/uploads/07-05geogrid-f1.pdf
UR  - https://trid.trb.org/view/891687
ER  - 

TY  - RPRT
AN  - 01129974
AU  - Yu, Lei
AU  - Qi, Yi
AU  - Yu, Hongxi
AU  - Guo, Lei
AU  - Chen, Xin
AU  - Texas Southern University, Houston
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Development of Left-Turn Operations Guidelines at Signalized Intersections
PY  - 2009/03//Technical Report
SP  - 283p
AB  - This project developed guidelines for recommending the most appropriate left-turn phasing treatments at signalized intersections. It investigated all aspects of left-turn operations, including the mode of left-turn signal control, the sequence of left-turn phasing, and left-turn signal displays. Both the operational and safety impacts of different types of left-turn signal operations were analyzed. In the operational impact analysis, based on the results of traffic simulation, cross products of left-turn and opposing through volume (CPOV)–based criteria for selecting the left-turn signal mode between the protected-only and protected/permissive left-turn modes were developed. In the safety impact analysis, by analyzing the historical accident data collected from more than 100 intersections, the safety performances of different types of left-turn signal phasing treatments and signal displays were ranked. In addition, this project also evaluated the benefits of regional standardization of left-turn operations. It was found that the mixed application of left-turn signal operations, including signal control modes, phasing sequences, and displays, increases the risk of accidents at intersections.
KW  - Crash data
KW  - Exclusive permissive phasing
KW  - Exclusive phasing
KW  - Guidelines
KW  - Highway operations
KW  - Left turns
KW  - Signalized intersections
KW  - Standardization
KW  - Traffic safety
KW  - Traffic simulation
UR  - https://trid.trb.org/view/890550
ER  - 

TY  - RPRT
AN  - 01129902
AU  - Bullough, John D
AU  - Zhang, Xin
AU  - Skinner, Nicholas P
AU  - Rea, Mark S
AU  - Rensselaer Polytechnic Institute
AU  - New Jersey Department of Transportation
AU  - Federal Highway Administration
TI  - Design and Evaluation of Effective Crosswalk Illumination
PY  - 2009/03//Final Report
SP  - 60p
AB  - Pedestrian-related crashes are a common cause of roadway fatalities, and reduced visibility at night is a probable contributor to pedestrian injuries and death. The purpose of the present study was to systematically evaluate different approaches to lighting at pedestrian crosswalks to improve pedestrian visibility and detection. The project team conducted a series of photometrically accurate lighting simulations in order to assess the visual conditions resulting from different lighting configurations, and assessed the economics (initial cost, and electricity and maintenance costs) of each system evaluated. Finally, the most promising lighting configuration was field tested during a one-night demonstration at an intersection in New Jersey. The results of visual performance and economic evaluations converged in that they suggested that a bollard-based fluorescent lighting system mounted at the ends of a crosswalk and oriented to provide vertical illumination on pedestrians in the crosswalk could be a feasible approach with reduced costs to improving pedestrian visibility. The results of the field demonstration also confirmed that the bollard-based solution was practical. Improvements of the approach such as use of louvers for glare control and coordinating light output level with the timing of pedestrian signals to provide an alerting signal are also provided.
KW  - Crosswalks
KW  - Economic analysis
KW  - Field tests
KW  - Glare
KW  - Louvers
KW  - Night visibility
KW  - Simulation
KW  - Street lighting
KW  - Vertical illuminance
UR  - http://www.nj.gov/transportation/refdata/research/reports/FHWA-NJ-2009-003.pdf
UR  - https://trid.trb.org/view/890121
ER  - 

TY  - RPRT
AN  - 01129900
AU  - Hedden, Christopher G
AU  - Kopp, J Christopher
AU  - Cambridge Systematics, Incorporated
AU  - New Jersey Department of Transportation
AU  - Federal Highway Administration
TI  - Transit Signal Priority; Systems Application and Technology Investigation
PY  - 2009/03//Final Report
SP  - 61p
AB  - This report describes the process and results of research to develop an evaluation process that will assist New Jersey Transit in quickly determining which intersections are good candidates for Transit Signal Priority (TSP). This evaluation process is applicable for passive and active TSP and could be applied to a variety of roadways, including urban arterials, state routes and county roads.
KW  - Bus priority
KW  - Design
KW  - Evaluation and assessment
KW  - New Jersey Transit
KW  - Systems analysis
KW  - Technology
KW  - Traffic signal preemption
UR  - https://trid.trb.org/view/890120
ER  - 

TY  - RPRT
AN  - 01129627
AU  - Ciarallo, Frank W
AU  - Brown, Nicholas
AU  - Niranjan, Suman
AU  - Wright State University
AU  - Ohio Department of Transportation
AU  - Federal Highway Administration
TI  - Enhancement of Winter Maintenance Material Ordering and Inventory
PY  - 2009/03//Final Report
SP  - 123p
AB  - Expenditures for winter maintenance materials total nearly $20 million annually. During an average winter ODOT uses approximately 666,000 tons of rock salt and has the capacity to store roughly 617,000 tons of material at various locations. Each year, each county in Ohio establishes a contract through ODOT with a salt vendor before the winter season and that vendor supplies all garages in the county for the entire season. In order to develop a systematic salt inventory management strategy that achieves the statewide goals for safety, this project developed ordering guidelines for each county that specifies when to order and how much to order based on an (R, S)-inventory guideline. These guidelines take into account the history of usage and deliveries in a county, as well as the monthly variation in usage. The inventory guidelines developed for the different areas of Ohio are based on a weather regression model for the major cities/counties in the state relating usage to weather. The guidelines were tested and refined using a computer simulation methodology. The resulting guidelines are compared to the current ODOT guidelines for inventory, as well as compared to the county storage capacities to develop recommendations. The project also developed design concepts for inventory monitoring to support effective ordering.
KW  - Deicing chemicals
KW  - Guidelines
KW  - Inventory
KW  - Materials
KW  - Ordering
KW  - Winter maintenance
UR  - ftp://ftp.mdt.mt.gov/research/LIBRARY/FHWA-OH-2009-1.PDF
UR  - http://worldcat.org/arcviewer/7/OHI/2013/12/09/H1386620130598/viewer/file1.pdf
UR  - http://ntl.bts.gov/lib/55000/55800/55848/FHWA-OH-2009-1.PDF
UR  - http://ntl.bts.gov/lib/55000/55800/55849/FHWA-OH-2009-1_EXEC_SUMMARY.PDF
UR  - https://trid.trb.org/view/889774
ER  - 

TY  - RPRT
AN  - 01129621
AU  - Zwahlen, Helmut T
AU  - Oner, Erdinc
AU  - Ohio University, Athens
AU  - Ohio Department of Transportation
AU  - Federal Highway Administration
TI  - Phase II – Improved Work Zone Design Guidelines and Enhanced Model of Traffic Delays in Work Zones. Part I: Development of Digital Computer Simulation Model, Part II: Baseline Free-Flow Measurements for Diversion Analysis after Construction Part, III: Development of Design Guidelines for Entrance (including Ramp Metering) and Exit Ramps
PY  - 2009/03//Final Report
SP  - 201p
AB  - This project contains three major parts. In the first part a digital computer simulation model was developed with the aim to model the traffic through a freeway work zone situation. The model was based on the Arena simulation software and used cumulative interarrival times as the input. Its aim was to determine the traffic volumes through the work zone and the queue lengths in advance of lane restrictions. The program was designed to handle up to 15 miles in length, up to six lanes, and up to 20 entrance and exit ramps. The developed program has not been validated due to the lack of reliable field data and the program appears to produce unreasonably short queue lengths and low exit ramp traffic counts compared to the input traffic data for cases where the exit ramps are spaced closely together. In the second part a diversion analysis was performed to determine the effects of closed ramps. The work zone sites were assigned by Ohio Department of Transportation and the diversion effects for these situations were in one case very minimal and in the other case as expected (traffic shifted to the next open exit ramp). In the third part guidelines for ramp management and ramp metering were established on a 24/7 basis giving special considerations to freeway mainline throughput and local traffic access to freeway.
KW  - Design
KW  - Ramp metering
KW  - Simulation
KW  - Traffic delays
KW  - Traffic diversion
KW  - Traffic flow
KW  - Traffic volume
KW  - Vehicle interarrival time
KW  - Work zone traffic control
KW  - Work zones
UR  - http://www.dot.state.oh.us/Divisions/TransSysDev/Research/reportsandplans/Reports/2009/Traffic/134270-FR.pdf
UR  - https://trid.trb.org/view/889783
ER  - 

TY  - RPRT
AN  - 01128978
AU  - Brown, Janice W
AU  - Pieplow, Robert
AU  - Driskell, Roger L
AU  - Gaj, Stephen J
AU  - Garvin, Michael J
AU  - Holbombe, Dusty L
AU  - Saunders, Michael T
AU  - Seiders, J Jeffrey
AU  - Smith, Arthur L
AU  - American Trade Initiatives
AU  - Federal Highway Administration
AU  - American Association of State Highway and Transportation Officials (AASHTO)
AU  - National Cooperative Highway Research Program
TI  - Public-Private Partnerships for Highway Infrastructure: Capitalizing on International Experience
PY  - 2009/03
SP  - 92p
AB  - Public-private partnership (PPP) programs for highway infrastructure are not widely used in the United States. The Federal Highway Administration, American Association of State Highway and Transportation Officials, and National Cooperative Highway Research Program sponsored a scanning study to collect information about PPP programs for highway infrastructure in Australia, Portugal, Spain, and the United Kingdom, where PPP experience is more extensive. The scan team learned that PPPs are an effective strategy for delivering highway projects, and they are service arrangements as much as financial ones. The team observed that potential PPP projects must be analyzed and structured thoughtfully to preserve public interests and that managing the partnership over the life of the contract is critical to providing the services expected. Team recommendations for U.S. implementation include convening workshops, developing training guidelines, establishing an expert task group, developing a research strategy, and publishing principles and guideline documents on PPP topics.
KW  - Australia
KW  - Contract administration
KW  - Highway projects
KW  - Portugal
KW  - Procurement
KW  - Public private partnerships
KW  - Road construction
KW  - Spain
KW  - Study tours
KW  - United Kingdom
UR  - http://international.fhwa.dot.gov/pubs/pl09010/pl09010.pdf
UR  - https://trid.trb.org/view/889292
ER  - 

TY  - SER
AN  - 01128969
JO  - Civil Engineering Studies, Illinois Center for Transportation Series
PB  - University of Illinois, Urbana-Champaign
AU  - Thompson, Marshall R
AU  - Garcia, Luis
AU  - Carpenter, Samuel H
AU  - University of Illinois, Urbana-Champaign
AU  - Illinois Department of Transportation
AU  - Federal Highway Administration
TI  - Cold In-place Recycling and Full-depth Recycling with Asphalt Products (CIR&FDRwAP)
PY  - 2009/03//Final Report
IS  - 09-036
SP  - 56p
AB  - In the 60’s, 70’s, and 80’s, many Illinois local road agencies successfully used “conventional” asphalt emulsions for In-Place Recycling to produce Emulsion-Aggregate-Mixtures (EAMs). In more recent years, these emulsions have not been widely used for Cold-In-Place Recycling construction. A major constraint to the continued utilization of EAMs was the long “drying time” (loss of moisture following mixing and prior to compaction) associated with the process. The use of “foamed-asphalt” and improved emulsion compositions (called “engineered emulsions”) has alleviated (some suggest eliminated) some of the concerns that have limited the use of emulsions for Cold-In-Place Recycling. The project objective is to evaluate and contribute to the facilitation and implementation of currently available CIR&FDRwAP (Cold In-Place Recycling and Full-Depth Recycling with Asphalt Products) technology. An “information/data” survey was conducted, ten selected CIR&FDRwAP projects were documented and evaluated, mixture properties (modulus, strength, fatigue) were established, thickness design options were evaluated, mixture design approaches were evaluated, and construction aspects considered. The mixture design procedures currently used by SemMaterials for Engineered Emulsions and the Wirtgen procedure (or procedures similar to the Wirtgen procedure) for foamed asphalt mixtures are recommended for interim use. Typical successfully used specifications for Full-Depth Recycling and Cold-in-Place-Recycling are presented. It is recommended that a “Working Group” be established to refine/further adapt the mixture design procedures and construction specifications for Illinois Local Roads and Streets utilization. Project information/findings/results support the recommendation that the CIR&FDRwAP process be considered a “standard procedure.” It currently is incorporated into a project as an “experimental feature.”
KW  - Asphalt emulsions
KW  - Cold in-place recycling
KW  - Foamed asphalt
KW  - Full-depth reclamation
KW  - Mix design
KW  - Specifications
UR  - http://ntl.bts.gov/lib/31000/31000/31024/ICT-09-036.pdf
UR  - https://trid.trb.org/view/889149
ER  - 

TY  - RPRT
AN  - 01128964
AU  - Ping, W Virgil
AU  - Xiao, Yuan
AU  - FAMU-FSU College of Engineering
AU  - Florida Department of Transportation
AU  - Federal Highway Administration
TI  - Effects of Aggregate Gradation, Aggregate Type, and SBS Polymer-Modified Binder on Florida HMAC Fracture Energy Properties
PY  - 2009/03//Final Report
SP  - 149p
AB  - The primary objective of this research study was to evaluate the fracture mechanics properties of hot mix asphalt (HMA) concrete for Superpave mixtures.  An experimental program was performed on asphalt mixtures with various types of materials.  The laboratory testing program was developed by applying the viscoelastic fracture mechanics-based framework that appeared to be capable of describing the whole mechanical properties of HMA according to past research studies at the University of Florida.  The goals for these experiments are to evaluate the effect of aggregate type, the effect of coarse aggregate gradation adjustment to control mix designs, and the effect of SBS polymer on fracture mechanics properties of HMA mixtures.  Two standard coarse mixes were selected as control levels for fracture mechanics tests:  one granite mixture and one limestone mixture.  Each control mix design was modified to two different gradation levels with the control asphalt binder (PG 67-22) and three SBS polymer content levels (3.0%, 4.5%, and 6.0%) with the original aggregate gradation.  Evaluation of the test results indicated the increase of nominal maximum aggregate amount by 5% to 15% to the standard coarse mix designs had negligible effect on HMA fracture mechanics properties.  The SBS polymer-modified asphalt binder improved the fracture mechanics behavior of asphalt mixtures comprehensively.  The limestone materials seemed to hold advantages over the granite materials in improving the performance of thermal cracking at low service temperatures and the rutting resistance at high service temperatures.
KW  - Aggregate gradation
KW  - Aggregates
KW  - Cracking
KW  - Fracture energy
KW  - Fracture mechanics
KW  - Granite
KW  - Hot mix asphalt
KW  - Laboratory tests
KW  - Limestone aggregates
KW  - Nominal maximum aggregate size
KW  - Polymer asphalt
KW  - Rutting
KW  - Styrene butadiene styrene
KW  - Superpave
KW  - Temperature
UR  - http://www.fdot.gov/research/Completed_Proj/Summary_SMO/FDOT_BD543_20_rpt.pdf
UR  - https://trid.trb.org/view/889112
ER  - 

TY  - SER
AN  - 01128961
JO  - Civil Engineering Studies, Illinois Center for Transportation Series
PB  - University of Illinois, Urbana-Champaign
AU  - Andrawes, Bassem
AU  - Shin, Moochul
AU  - Pozolo, Andrew
AU  - University of Illinois, Urbana-Champaign
AU  - Illinois Department of Transportation
AU  - Federal Highway Administration
TI  - Transfer and Development Length of Prestressing Tendons in Full-Scale AASHTO Prestressed Concrete Girders using Self-Consolidating Concrete
PY  - 2009/03//Research Report
IS  - 09-038
SP  - 64p
AB  - Self-consolidating concrete (SCC) is a highly workable concrete that flows through densely reinforced or complex structural elements under its own weight. The benefits of using SCC include: a) Reducing labor costs by eliminating the need for mechanical vibration, b) Improving constructability, c) Providing a virtually flawless finish, d) Providing uniform and homogenous concrete, and e) Easily filling a complex shape formwork. Even though SCC is comparable to conventional concrete in terms of strength, the comparability of its bond to steel is less well-defined. This disparity of knowledge becomes more critical when using SCC in prestressed members due to the impact that bond strength has on the transfer and development lengths of prestressing tendons. The increasing interest among Illinois precasters in using SCC in bridge girders has motivated the Illinois Department of Transportation (IDOT) and the Illinois Center for Transportation (ICT) to sponsor this synthesis study, which reviews and combines information from literature discussing the impact of using SCC on the transfer and development lengths of prestressing tendons in AASHTO bridge girders. The primary objectives of this study include: (1) Utilizing the results of previous research to evaluate the effect of using SCC on the transfer and development lengths of prestressing tendons and evaluate how SCC compares with conventional concrete, (2) Investigating the feasibility of using SCC in AASHTO bridge girders without the need for changing current design provisions recommended by the ACI and AASHTO, and (3) Providing IDOT with recommendations regarding the application of SCC in prestressed bridge girders.
KW  - Bond strength (Materials)
KW  - Development length
KW  - Girders
KW  - Literature reviews
KW  - Prestressed concrete
KW  - Prestressing
KW  - Self compacting concrete
KW  - Tendons (Materials)
KW  - Transfer length
UR  - http://ntl.bts.gov/lib/31000/31000/31026/ICT-09-038.pdf
UR  - https://trid.trb.org/view/889147
ER  - 

TY  - RPRT
AN  - 01128394
AU  - Bonneson, James A
AU  - Sunkari, Srinivasa R
AU  - Pratt, Michael Paul
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Traffic Signal Operations Handbook
PY  - 2009/03//Product
SP  - 162p
AB  - The Texas Department of Transportation (TxDOT) operates thousands of traffic signals along state highways in the state of Texas, both in rural areas and small cities. The timing and maintenance of these signals are the responsibility of the TxDOT districts in which they are located. As a result, each district has an interest in traffic signal timing design, detection design, and traffic signal maintenance. The local operation and maintenance of traffic signals has served the state well over the years. However, the same local control of signal operation and maintenance has resulted in differences in practice across the state. As traffic on Texas highways increases, these differences may lead to operational inconsistencies and sub-optimal performance, which can increase delays and fuel consumption. This handbook provides guidelines for timing traffic control signals at intersections that operate in isolation or as part of a coordinated signal system. The guidelines are intended to describe best practices, as identified through interviews with TxDOT engineers and technicians, and to identify conditions where alternative practices are equally workable. The handbook is intended to make resource investment in signal timing maintenance cost-effective and signal operation more consistent on an area-wide basis. It is likely to be most useful to engineers that desire quick-response methods for maintaining or improving the operation of existing signalized intersections.
KW  - Best practices
KW  - Cost effectiveness
KW  - Guidelines
KW  - Handbooks
KW  - Isolated intersections
KW  - Maintenance
KW  - Texas
KW  - Traffic signal control systems
KW  - Traffic signal timing
UR  - http://tti.tamu.edu/documents/0-5629-P1.pdf
UR  - https://trid.trb.org/view/888986
ER  - 

TY  - RPRT
AN  - 01128380
AU  - Schmitt, Robert L
AU  - Bahia, Hussain U
AU  - Johnson, Carl
AU  - Hanz, Andrew
AU  - University of Wisconsin, Platteville
AU  - Wisconsin Department of Transportation
AU  - Federal Highway Administration
TI  - Development of Recommendations for Compaction Temperatures in the Field to Achieve Density and Limit As-Built Permeability of HMA in Wisconsin
PY  - 2009/03//Final Report
SP  - 146p
AB  - The objectives of this study were to (1) evaluate the effect of compaction effort and temperature on densification of hot mix asphalt (HMA) in the field and in the lab, (2) quantify the effects of Warm Mix additives on the compaction, and (3) create a dataset capable of determining the effect of as-built density and permeability on asphalt pavement performance.  Field testing and loose-mix sampling occurred on 30 unique layers of HMA during the 2007 paving season, and a single Warm Mix project during the 2008 paving season.  Loose-mix samples from the construction projects were compacted in the Superpave Gyratory compactor at two pressure settings, 300 kPa and 600 kPa; and at three temperatures of 248, 194, and 140 deg F.  Factors affecting field density gain in rank order were mat temperature, number of roller passes, roller type, vibratory setting, and PG binder grade.  Density of 92% Gmm can be achieved, however at lower temperatures, more roller passes are necessary.  A 300 kPa pressure yields a density (@Ndes) about 1.8% less than 600 kPa at 248 deg F.  The density was reduced by about 0.4% when compacting at 194 deg F, and 2.4% at 140 deg F.  Aggregate source and fine aggregate angularity had a marginal effect on compactive effort.  A moderate correlation was found between lab temperature and field temperature to achieve a mutual density.  Higher Ndes mix will require more field passes.  A lab and field evaluation of single Warm Mix Asphalt (WMA) E-1 mixture determined that the average final density for WMA and traditional HMA were nearly identical.  For a similar number of roller passes, 30% RAP content averaged 2.6% greater density values than 40% RAP content.  The results of the laboratory evaluation demonstrate that the use of the WMA additive allowed for an increased amount of RAP in the mix without a significant detriment to mixture workability as shown using the CDI.  Both the HMA and WMA 30% mixes approached the Superpave criteria of 4% air voids at Ndes over all compaction temperatures; the air void levels in the WMA 40% were considerably lower than the 4% target.  A single database was created to model pavement performance and establish specific density and permeability criteria.  A stand-alone spreadsheet file is included with this report to be used in performance modeling after several years from the 2007 construction season.
KW  - Air voids
KW  - Compaction
KW  - Densification
KW  - Field density
KW  - Field tests
KW  - Gyratory compaction
KW  - Hot mix asphalt
KW  - Laboratory tests
KW  - Permeability
KW  - Pressure
KW  - Recommendations
KW  - Roller passes
KW  - Temperature
KW  - Warm mix paving mixtures
UR  - http://minds.wisconsin.edu/bitstream/handle/1793/53405/07-17%2520Final%2520Report.pdf
UR  - http://wisdotresearch.wi.gov/wp-content/uploads/07-17lowercompactiontemps-f.pdf
UR  - https://trid.trb.org/view/888877
ER  - 

TY  - RPRT
AN  - 01127428
AU  - Romanoschi, Stefan A
AU  - Dumitru, Cristian
AU  - Lewis, Paul A
AU  - Hossain, Mustaque
AU  - Kansas State University, Manhattan
AU  - Kansas Department of Transportation
AU  - Federal Highway Administration
TI  - Accelerated Testing for Studying Pavement Design and Performance (FY 2004): Thin Bonded Rigid Overlay on PCCP and HMA (CISL Experiment No. 13)
PY  - 2009/03//Final Report
SP  - 132p
AB  - The thirteenth full-scale Accelerated Pavement Test (APT) experiment at the Civil Infrastructure Laboratory (CISL) of Kansas State University aimed to determine the response and the failure mode of thin concrete overlays.  Four pavement structures were built and tested in this experiment:  two Thin Concrete Overlay (TCO) pavements, with 4-in. and 6-in. thick overlays constructed on a 5-in. thick portland cement concrete pavement (PCCP) and two Thin Whitetopping (TWT) pavements, with 4-in. and 6-in. thick PCC overlays constructed on a 5-in. hot mix asphalt layer.  The pavements were instrumented to measure the strains at selected locations in each PCC overlay.  Each of the four pavements was loaded with approximately two million passes of the CISL APT machine, under indoor ambient temperature condition.  No moisture was added to the pavements.  Response measurements and performance evaluations were performed at about every 100,000 passes.  The TCO overlays failed due to the loss of support underneath the concrete slab which caused transverse cracks to develop in both 4-in. and 6-in. PCC overlays.  No loss of bond between the PCC overlay and the supporting slab was observed.  The 4-in. TWT exhibited a transverse crack at the middle of the slab, while the 6-in. TWT exhibited no cracks at the end of testing.  The theoretical strains in the concrete overlays at the locations where instrumentation was installed were computed with the ANSYS Finite Element Method (FEM) software.  It was found that the magnitude and shape of computed strains matched well with those of the strains measured before any APT loads were applied.  It was, therefore, concluded that the three-dimensional finite element model built and the assumption made (linear elastic materials, fully bonded overlays) can accurately estimate the response of TWT and TCO pavements under wheel loading.  In addition, the FEM can be used to estimate the evolution of lineal extent of the loss of support under the joints by comparing the measured strains with the corresponding computed strains.
KW  - Accelerated loading facilities
KW  - Accelerated tests
KW  - ANSYS (Computer program)
KW  - Asphalt pavements
KW  - Concrete overlays
KW  - Concrete pavements
KW  - Finite element method
KW  - Load tests
KW  - Pavement design
KW  - Pavement performance
KW  - Strain (Mechanics)
KW  - Transverse cracking
KW  - Whitetopping
UR  - http://www.ksdot.org/PublicLib/publicDoc.asp?ID=003785321
UR  - https://trid.trb.org/view/887910
ER  - 

TY  - RPRT
AN  - 01127420
AU  - Gisi, Andrew J
AU  - Kansas Department of Transportation
AU  - Federal Highway Administration
TI  - Special Experimental Project (SEP-14) Alternate Surfacing Bidding
PY  - 2009/03//Initial Report
SP  - 36p
AB  - This report contains a discussion of the alternate bidding process used on a highway project in Kansas.  It discusses the background, bidding process, evaluation of the bids, and conclusions drawn from the experience.  It also includes a customer survey and analysis of the bids submitted by contractors.  The analysis of the bids received and the estimates made by Kansas Department of Transportation (KDOT) show little difference in price, had KDOT selected the pavement type rather than let it as an alternate.  The alternate bid process resulted in the agency receiving the least cost project.  However, the objective of selecting surface type for the mainline pavement was not realized.  The analysis also shows that had KDOT let the major work items such as surfacing, grading, and bridges, separately it may have realized additional savings.  However, KDOT may have faced some challenges administering a project with multiple contractors.
KW  - Alternate bid process
KW  - Competitive bidding
KW  - Contracting
KW  - Kansas
KW  - Kansas Department of Transportation
KW  - State highway projects
UR  - http://www.ksdot.org/PublicLib/publicDoc.asp?ID=003785317
UR  - https://trid.trb.org/view/887912
ER  - 

TY  - RPRT
AN  - 01127416
AU  - Benz, Robert Joseph
AU  - Pike, Adam M
AU  - Kuchangi, Shamanth P
AU  - Brackett, Quinn
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Serviceable Pavement Marking Retroreflectivity Levels: Technical Report
PY  - 2009/03//Technical Report
SP  - 150p
AB  - This research addressed an array of issues related to measuring pavement markings retroreflectivity, factors related to pavement marking performance, subjective evaluation process, best practices for using mobile retroreflectometers, sampling pavement markings, and best practices for a Pavement Marking Management system. Tests conducted to assess subjective evaluation showed inconsistency in subjective retroreflectivity evaluation when compared between different evaluations, marking color, and retroreflectivity levels. Sensitivity testing on several factors that could potentially affect mobile retroreflectometer readings showed that distance from which the measurements are taken and position across the measurement window seemed to have the most significant impact on the mobile retroreflectivity measurements. The evaluation factors of data acquisition, vehicle speed, and small changes in measurement geometry made no practical difference to the measurement. However, constant speed provided best results. Based on the sensitivity testing this report enlists some best practices for mobile retroreflectometer measurements. A methodology for combining mobile retroreflectivity data with pavement information and plotting a map, color coded based on pavement marking retroreflectivity level using a geographic information system (GIS), is demonstrated in this project. This report also provides discussion on other best practices for sampling and a Pavement Marking Management system.
KW  - Best practices
KW  - Geographic information systems
KW  - Management systems
KW  - Measurement
KW  - Mobile retroreflectometers
KW  - Retroreflectivity
KW  - Road markings
UR  - https://trid.trb.org/view/887941
ER  - 

TY  - RPRT
AN  - 01127176
AU  - Zegeer, Charles V
AU  - Sandt, Laura S
AU  - Scully, Margaret
AU  - Ronkin, Michael
AU  - Cynecki, Mike
AU  - Lagerwey, Peter
AU  - University of North Carolina, Chapel Hill
AU  - Federal Highway Administration
AU  - National Highway Traffic Safety Administration
AU  - BMI-SG
TI  - How to Develop a Pedestrian Safety Action Plan (Revised)
PY  - 2009/03//Revised Edition
SP  - 196p
AB  - The purpose of this guide is to present an overview and framework for state and local agencies to develop and implement a Pedestrian Safety Action Plan tailored to their specific problems and needs. A Pedestrian Safety Action Plan is a plan developed by community stakeholders that is intended to improve pedestrian safety in the community. An objective of the guide is to help state and local officials know where to begin to address pedestrian safety issues. It is also intended to assist agencies in further enhancing their existing pedestrian safety programs and activities, including identifying safety problems and selecting optimal solutions. This guide is primarily a reference for improving pedestrian safety through street redesign and the use of engineering countermeasures as well as other safety-related treatments and programs that involve the whole community. This guide can be used by engineers, planners, traffic safety and enforcement professionals, public health and injury prevention professionals, and decision-makers who have the responsibility of improving pedestrian safety at the state or local level. The guide contains the following chapters: (1) Planning and Designing for Pedestrian Safety--The Big Picture; (2) Involving Stakeholders; (3) Collecting Data to Identify Pedestrian Safety Problems; (4) Analyzing Information and Prioritizing Concerns; (5) Selecting Safety Solutions; (6) Providing Funding; and (7) Creating the Pedestrian Safety Action Plan.  Chapter 7 provides the framework that state and local agencies can use to develop a customized Pedestrian Safety Action Plan.  The concepts, principles, and information contained in this guide are based on national guidelines.  Pedestrian plans and design guidelines from local and state transportation agencies throughout the U.S. are referenced throughout this guide.
KW  - Communities
KW  - Countermeasures
KW  - Data collection
KW  - Financing
KW  - Guidelines
KW  - Local government
KW  - Pedestrian safety
KW  - Pedestrian Safety Action Plan
KW  - Problem identification
KW  - Safety programs
KW  - Stakeholders
KW  - State departments of transportation
KW  - Street design
UR  - http://safety.fhwa.dot.gov/ped_bike/ped_focus/docs/fhwasa0512.pdf
UR  - https://trid.trb.org/view/887835
ER  - 

TY  - RPRT
AN  - 01127123
AU  - Ullman, Gerald L
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - DMS Message Design Workshops
PY  - 2009/03//Technical Report
SP  - 14p
AB  - This report summarizes the training conducted statewide regarding the design and display of messages on dynamic message signs. The training is based on the "Dynamic Message Sign Message Design and Display Manual" (0-4023-P3). Researchers developed a series of PowerPoint® slides, an instructor guide, and a participant notebook. Workshops were held in Austin (twice), Fort Worth, Odessa, Houston, Corpus Christi, Tyler, and El Paso. All total, 90 participants attended the workshop.
KW  - Design
KW  - Variable message signs
KW  - Workshops
UR  - http://tti.tamu.edu/documents/5-4023-01-1.pdf
UR  - https://trid.trb.org/view/887774
ER  - 

TY  - RPRT
AN  - 01127115
AU  - Garber, Nicholas J
AU  - Buchanan, Chase R
AU  - Kweon, Young-Jun
AU  - Virginia Transportation Research Council
AU  - Virginia Department of Transportation
AU  - Federal Highway Administration
TI  - Crash Causal Factors and Countermeasures for High-Risk Locations on Multilane Primary Highways in Virginia
PY  - 2009/03//Final Report
SP  - 62p
AB  - In 2004, a total of 95,020 vehicle crashes occurred on highways under the jurisdiction of the Virginia Department of Transportation (VDOT). Of these, 39,847 crashes occurred on primary highways, and 345 of these were fatal crashes. VDOT’s traffic engineers continue to place increasing emphasis on identifying causal factors for crashes to enhance the selection of appropriate and effective countermeasures. The purpose of this study was to identify causal factors and appropriate countermeasures for crashes occurring at high-risk locations on multilane primary highways from 2001 through 2006. These high-risk locations were identified by Fontaine and Reed (2006) in a VDOT safety corridor study. A total of 365 sites, 1 to 2 mi in length, were used in the study. The statewide sites were located on rural and urban highways with divided, undivided, and traversable medians, with about 40 sites per VDOT district. Crash data were extracted from police crash reports, and geometric data were collected through site visits. Operational data were collected using VDOT’s resources. The analysis involved more than 34,000 crashes and was conducted using fault tree analysis and generalized linear modeling. The fault tree analysis was used to determine the critical fault path based on the probability of an event occurring. Individual fault trees were constructed for each collision type and for each highway classification. The generalized linear models were developed for different highway classifications: urban divided, urban undivided, urban traversable (central lanes that can be used for left turns in both directions), and rural divided highways. Models were developed for rear-end crashes and total crashes, and separate models were developed for injury crashes, property damage only (PDO) crashes, and injury + PDO crashes. Appropriate potential countermeasures were then identified based on the significant causal factors identified in the models. The results indicated that rear-end crashes were the predominant type of crash, representing 56% of all PDO crashes on urban divided highways and 37% of all PDO crashes on rural divided highways. Implementing the recommended countermeasures for total, rear-end, and angle crashes for different assumed levels of rehabilitation is expected to result in a crash reduction of up to about 40% depending on the site and level of rehabilitation undertaken. A benefit/cost analysis showed that the benefit/cost ratios were higher than 1 for all levels of countermeasure implementation.
KW  - Benefit cost analysis
KW  - Countermeasures
KW  - Crash causes
KW  - Fatalities
KW  - Fault tree analysis
KW  - High risk locations
KW  - Injuries
KW  - Mathematical models
KW  - Multilane highways
KW  - Property damage
KW  - Rear end crashes
KW  - Rural highways
KW  - Traffic crashes
KW  - Urban highways
KW  - Virginia
UR  - http://www.virginiadot.org/vtrc/main/online_reports/pdf/09-r15.pdf
UR  - https://trid.trb.org/view/887793
ER  - 

TY  - RPRT
AN  - 01126561
AU  - Huijser, Marcel P
AU  - Holland, Tiffany D
AU  - Kociolek, Angela V
AU  - Barkdoll, Aaron M
AU  - Schwalm, Jessica D
AU  - Western Transportation Institute
AU  - Oregon Department of Transportation
AU  - Federal Highway Administration
TI  - Animal-Vehicle Crash Mitigation Using Advanced Technology. Phase II: System Effectiveness and System Acceptance
PY  - 2009/03//Phase II Final Report
SP  - 162p
AB  - This project was initiated in the fall of 1999. The results through the fall of 2005 (Phase I) have been documented in detail in an earlier report. The Phase I accomplishments included the following: identification of existing animal detection system technologies and their vendors; selection of two of these systems for field tests; deployment of the two selected systems (one in Yellowstone National Park in Montana, and one in Pennsylvania); documentation of the experiences with system installation; testing of the reliability of the systems; and formulating advice for the future development and application, including cost-benefit analyses. One of the two experimental animal detection systems (Montana site) proved to be able to detect elk (Cervus elaphus) reliably. However, as a result of steep slopes and curves, the system had blind spots where large animals were able to approach the road undetected. Therefore the warning signs could not be attached, and the effectiveness of the system in reducing vehicle speed and in reducing the number of collisions with large wild animals could not be evaluated. In Phase II of the project, subject of the current report, system modifications reduced the blind spots so that the warning signs could be attached. Speed measurements showed that passenger cars, pick-ups, vans, and trucks with two units or more all had lower vehicle speed with the warning signs activated compared to warning signs off. The number of collisions with large wild animals was 58-67% lower than expected, but because of the variability in the number of collisions and only one year of post installation collision data, the researchers could not test whether this reduction was significant. The opinions on and experiences of drivers with the system were documented in interviews. A majority would have liked to see the US Highway 191 system stay in place (59%), and thought animal detection systems were a good idea, in general (71%). In accordance with an agreement with Yellowstone National Park, the system was removed in fall 2008, due to high maintenance, lack of spare parts and concerns about landscape aesthetics. Finally, this report includes a recommended step plan for agencies considering the installation of an animal detection system alongside a road and recommendations for future research and monitoring of the reliability and effectiveness of animal detection systems.
KW  - Acceptance
KW  - Animal detection systems
KW  - Animal vehicle collisions
KW  - Detectors
KW  - Dynamic warning signs
KW  - Elk
KW  - Montana
KW  - Reliability
KW  - Speed measurement
KW  - Speed reduction
KW  - Ungulates
KW  - Warning systems
KW  - Wildlife
KW  - Yellowstone National Park
UR  - https://ntl.bts.gov/lib/31000/31600/31698/Animal-Vehicle_Crash_Mitigation_Phase_2.pdf
UR  - https://trid.trb.org/view/887659
ER  - 

TY  - RPRT
AN  - 01126519
AU  - Higgins, Christopher
AU  - Nguyen, Quang D
AU  - Oregon State University, Corvallis
AU  - Oregon Department of Transportation
AU  - Federal Highway Administration
TI  - Digital Image Rectification Tool for Metrification of Gusset Plate Connections in Steel Truss Bridges
PY  - 2009/03//Final Report
SP  - 78p
AB  - A method was developed to obtain dimensional data from photographs for analyzing steel truss gusset plate connections. The method relies on a software application to correct photographic distortion and to scale the photographs for analysis. The approach enables rapid and accurate collection of dimensional measurements compared to traditional methods. Users can quickly create AutoCAD drawings by collecting dimensional information about the gusset plates from the photographs. The rectified photographs provide a record of field conditions that can be compared with subsequent field inspection results to help identify and quantify long term changes in visual characteristics. The implementation procedure is straightforward and does not require specialized knowledge of photogrammetry. It can be practically employed under field conditions using current technology and personnel, and it reduces the likelihood of data entry errors. Dimensional measurements from the method provide results that are as good conventional field measurements and are within tolerances that most engineers would find reasonable for gusset plate connection capacity evaluations.
KW  - Digital images
KW  - Gusset plates
KW  - Inspection
KW  - Measurement
KW  - Photographs
KW  - Rectification
KW  - Size
KW  - Structural connection
KW  - Truss bridges
UR  - http://www.oregon.gov/ODOT/TD/TP_RES/ResearchReports/Gusset_Plate.pdf
UR  - https://trid.trb.org/view/887609
ER  - 

TY  - RPRT
AN  - 01126516
AU  - Lovejoy, Steven C
AU  - Oregon Department of Transportation
AU  - Oregon Department of Transportation
AU  - Federal Highway Administration
TI  - A Fitness-for-Purpose Evaluation of Fracture Critical Electro-Slag Welds
PY  - 2009/03//Final Report
SP  - 461p
AB  - A fitness-for-purpose evaluation was performed on the electro-slag flange welds of the West Fremont bridge approach superstructures, which cross the Willamette River in Portland, Oregon, per the request of the Federal Highway Administration. This evaluation required gathering knowledge of the material properties, fabrication defects and service loads pertaining to the weldments in question. The serviceability of the weldments was assessed based on the fatigue and fracture performance. It was concluded that the welds have sufficient toughness and fatigue resistance to remain in service with no retrofitting.
KW  - Bridge superstructures
KW  - Electroslag welding
KW  - Fatigue (Mechanics)
KW  - Flanges
KW  - Fracture properties
KW  - Inspection
KW  - Portland (Oregon)
KW  - Serviceability
KW  - Weldments
KW  - Willamette River
UR  - http://www.oregon.gov/ODOT/TD/TP_RES/ResearchReports/Electro_Slag_Welds.pdf
UR  - https://trid.trb.org/view/887613
ER  - 

TY  - RPRT
AN  - 01126514
AU  - Quiroga, Cesar
AU  - Li, Yingfeng
AU  - Kraus, Edgar
AU  - Le, Jerry
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Utility Installation Review System – Implementation Report
PY  - 2009/03//Technical Report
SP  - 84p
AB  - Each year, the Texas Department of Transportation (TxDOT) issues thousands of approvals that enable new utility installations to occupy the state right of way (ROW). The current utility installation review process relies on the physical delivery of an application package to a TxDOT district office that includes a notice of proposed installation and supporting documentation depicting the location and characteristics of the proposed installation. The review process typically includes several offices at the district and, as needed, communication exchanges with installation owner applicants for additional clarifications and/or documentation. In its current structure, the utility installation review process is paper and labor intensive. It is also not appropriate for supporting the long-term goal of helping to maintain a reliable inventory of utility installations on the state ROW. This report describes the development and implementation of a web-based system that automates the submission, review, approval, construction, and archival of utility installation requests at TxDOT. The system, called the Utility Installation Review (UIR) system, enables users to submit and process installation requests online, including supporting documentation such as design and construction drawings. The system also includes an online geographic information system (GIS)-based interface that enables users to locate and query proposed installation requests using an interactive map. The system includes tabular and GIS-based reporting options. This report also summarizes the results of an extensive testing phase at four TxDOT districts: San Antonio, Pharr, Bryan, and Fort Worth, which included the participation of a large number of utility companies and operators.
KW  - Application software
KW  - Geographic information systems
KW  - Installation
KW  - Internet
KW  - Inventory
KW  - Permits
KW  - Public utilities
KW  - Right of way (Land)
KW  - Texas Department of Transportation
KW  - Web-based systems
UR  - http://tti.tamu.edu/documents/5-2110-03-2.pdf
UR  - https://trid.trb.org/view/887618
ER  - 

TY  - RPRT
AN  - 01126253
AU  - Washer, Glenn A
AU  - Rosenblad, Brent
AU  - Morris, Scott E
AU  - University of Missouri, Columbia
AU  - Missouri Department of Transportation
AU  - Federal Highway Administration
TI  - Remote Health Monitoring for Asset Management
PY  - 2009/03//Final Report
SP  - 56p
AB  - This project investigated the development of an instrumented pile that could provide real-time data on bridge scour, allowing for the remote monitoring of bridge conditions by key managers and engineers. The developed technology has the potential to identify hazardous conditions at a bridge site, such that managers and owners can be notified automatically and appropriate actions can be undertaken. The instrumented pile monitors the temperature along the length of a pile embedded in the soil in a river bed. Monitoring the temperature profile along the length of the pile shows the thermal variations that exist in the water and in the soil, as a means of estimating where the soil / water interface exists. If a scour hole develops in the area of the pile, the depth of the soil / water interface is consequently changed, and this change is detected by thermal variations detected along the length of the pile. This technology provides a practical means of managing a bridge asset by reporting on potentially dangerous scour conditions such that mitigation strategies can be employed. This report documents the development of an innovative sensor array technology and initial field implementation.
KW  - Asset management
KW  - Bridge substructures
KW  - Bridges
KW  - Field tests
KW  - Missouri
KW  - Monitoring
KW  - Piles (Supports)
KW  - Real time information
KW  - Remote sensing
KW  - Scour
KW  - Technological innovations
KW  - Temperature
KW  - Temperature sensors
UR  - http://library.modot.mo.gov/RDT/reports/ri07002/or09019.pdf
UR  - http://ntl.bts.gov/lib/30000/30600/30662/or09019.pdf
UR  - https://trid.trb.org/view/887561
ER  - 

TY  - RPRT
AN  - 01124746
AU  - Kruse, Carl James
AU  - Morgan, Curtis A
AU  - Hutson, Nathan M
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Potential Policies and Incentives to Encourage Movement of Containerized Freight on Texas Inland Waterways
PY  - 2009/03//Technical Report
SP  - 158p
AB  - This report is designed to answer three basic questions: (1) Why is the Texas Department of Transportation (TxDOT) interested in moving more cargo by water? (2) What are the potential benefits of moving more cargo by water? and (3) What specific steps can TxDOT or the State of Texas take to encourage more waterborne freight movements? In this report, the authors:  describe the need for increased utilization of marine freight options, look at the challenges involved, and describe the potential benefits of increasing the utilization of marine freight options. The authors provide a summary of relevant programs in Europe and the activities of other gulf states. They analyze the capacity and efficiency of the Gulf Intracoastal Waterway, as this waterway will most likely be the conduit for increased coastwise shipments. They then provide several examples of activities taken by Texas ports to encourage more domestic waterborne freight shipments, along with several examples of recent start-up services. The report recommends several steps TxDOT could pursue in the short term to encourage more waterborne shipments along the coast. Finally, the report includes a chapter of Frequently Asked Questions regarding “Short Sea Shipping” or “Marine Highways” for readers who do not regularly deal with marine transportation issues. Several appendices provide detailed background material on federal issues, legislation, the Energy Independence and Security Act of 2007, and the role of waterborne freight in Texas.
KW  - Benefits
KW  - Coastwise shipping
KW  - Containerization
KW  - Europe
KW  - Freight transportation
KW  - Gulf Intracoastal Waterway
KW  - Gulf States
KW  - Incentives
KW  - Inland waterways
KW  - Policy
KW  - Ports
KW  - Short sea shipping
KW  - Texas
KW  - Water transportation
KW  - Waterborne commerce
UR  - http://tti.tamu.edu/documents/0-5937-1.pdf
UR  - https://trid.trb.org/view/886040
ER  - 

TY  - RPRT
AN  - 01124744
AU  - Sebesta, Stephen
AU  - Liu, Wenting
AU  - Scullion, Tom
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Implementing GPS into Pave-IR
PY  - 2009/03//Technical Report
SP  - 16p
AB  - To further enhance the capabilities of the Pave-IR thermal segregation detection system developed at the Texas Transportation Institute, researchers incorporated global positioning system (GPS) data collection into the thermal profiles. This GPS capability enhances operation by allowing easier identification of the limits of the thermal profile and by more easily and precisely identifying the location of anomalous temperatures for long-term monitoring. Three existing Pave-IR test systems were retrofitted to include GPS capability.
KW  - Data collection
KW  - Global Positioning System
KW  - Hot mix asphalt
KW  - Infrared imagery
KW  - Pave-IR
KW  - Pavers
KW  - Quality control
KW  - Retrofitting
KW  - Segregation (Aggregates)
KW  - Thermal imagery
UR  - http://tti.tamu.edu/documents/5-4577-03-1.pdf
UR  - https://trid.trb.org/view/886037
ER  - 

TY  - RPRT
AN  - 01124740
AU  - Garcia, Mei
AU  - Ding, Liang
AU  - Obeng-Boampong, Kwaku
AU  - Henk, Russell H
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Development of Frontage Road Yield Treatment Analysis Tool (FRYTAT) Database Software
PY  - 2009/03//Technical Report
SP  - 34p
AB  - The Texas Department of Transportation (TxDOT) sponsored Project 0-4986, “An Assessment of Frontage Road Yield Treatments,” to assess the effectiveness of a wide variety of frontage road–exit ramp and frontage road–U-turn yield treatments that exist in Texas. Toward this goal, simulation modeling procedures compensated for the impracticability of the data collection effort that would be required to compile every possible combination of volume, geometry, and yield treatment types. Researchers ran several thousand simulations and generated significant numbers of measures of performance and comparative analysis. Researchers, in consultation with TxDOT, sought to develop a database software tool to incorporate all the results obtained from the initial research. This will provide TxDOT staff with a more useful tool in determining appropriate yield treatments at exit ramp/U-turn and frontage road merge areas. This report summarizes the work completed during the extension year, which resulted in the development of the Frontage Road Yield Treatment Analysis Tool (FRYTAT). The report briefly summarizes the interaction and coordination between the TxDOT panel and the Texas Transportation Institute research team, describes the development of the main framework of the tool, and illustrates the final product, FRYTAT.
KW  - Frontage roads
KW  - Off ramps
KW  - Simulation
KW  - Software
KW  - Texas
KW  - U turns
KW  - Yield treatments
UR  - http://tti.tamu.edu/documents/0-4986-2.pdf
UR  - https://trid.trb.org/view/886038
ER  - 

TY  - ABST
AN  - 01464490
TI  - Guidelines on the Use of Auxiliary Through Lanes at Signalized Intersections
AB  - Auxiliary through lanes beyond signalized intersections are recognized as an approach to increase the intersection capacity through their efficient utilization. The benefits from the use of auxiliary through lanes at signalized intersections can be realized in the presence of equally distributed traffic over the lanes prior to the intersection. Utilization of auxiliary through lanes beyond a signalized intersection has been seen throughout the United States. Prior studies suggest that the length of the auxiliary lane beyond the intersection is a significant factor affecting the upstream lane usage, therefore, the intersection capacity. However, the conditions for their effective use and their impact on safety, operation, and the environment have yet to be documented. Thus, research is needed to provide technical assessment of their use, document their impact on safety and operations, and develop guidelines including design criteria and placement. This study will assist traffic engineers in adopting criteria for the effective and safe use of intersection auxiliary through lanes. TRIS and RIP literature searches yielded few documents. Another literature search found that non-uniform formulas in practices have been used in determining the length of auxiliary through lanes downstream of an intersection. 12 * Green interval time in seconds (Public Roads Vol. 34, Nos. 9 and 10, August 1967 and October 1967, FHWA) and 10 * Minimum green time G in seconds (Roadway Design Manual, Section 6, New Jersey Department of Transportation) are examples. The objectives of the research are the following: (a) provide a comprehensive literature and state-of-practice review on intersection auxiliary through lanes, (b) assess the operational effectiveness and impact on safety and capacity, and (c) develop guidelines for their use.</font></div><div><br /></div>
KW  - Arterial highways
KW  - Auxiliary lanes
KW  - Evaluation and assessment
KW  - Highway capacity
KW  - Research projects
KW  - Signalized intersections
KW  - Through lanes
UR  - http://www.trb.org/TRBNet/ProjectDisplay.asp?ProjectID=2492
UR  - https://trid.trb.org/view/1232720
ER  - 

TY  - ABST
AN  - 01464377
TI  - Research for AASHTO Standing Committee on Highways. Task 263. Update of the AASHTO Guide for the Planning, Design, and Operation of Pedestrian Facilities
AB  - The 1st Edition of the AASHTO Guide for the Planning, Design, and Operation of Pedestrian Facilities (AASHTO Pedestrian Guide) was published in 2004 and reflects the state of the practice in 2001 - 2002 when it was written. Being the first edition, this guide may need some content changes or additions that were discovered once practitioners began using the guide. In addition, there has been newer research in many areas affecting the planning, design, and operation of pedestrian facilities. The objective of this study is to develop an outline of the scope and content of the next edition of the AASHTO Pedestrian Guide.<div></div>
KW  - Guidelines
KW  - Pedestrian areas
KW  - Pedestrian malls
KW  - Planning and design
KW  - State of the practice
KW  - Walkways
UR  - http://www.trb.org/TRBNet/ProjectDisplay.asp?ProjectID=2476
UR  - https://trid.trb.org/view/1232607
ER  - 

TY  - ABST
AN  - 01464378
TI  - Transportation Systems Operations and Management Guide
AB  - In their 2005 Strategic Plan, the American Association of State Highway and Transportation Officials (AASHTO) set the following objectives (among others): (1) Develop customer-driven delivery models in the areas of system operation and management; (2) Establish transportation as a vital element of national security; (3) Increase mobility by encouraging multimodal and intermodal solutions, policies, and technologies; (4) Establish safety as a national priority; and (5) Develop centers of excellence in safety, operations, finance, and freight. Integral to all of these objectives is the need for transportation agencies to proactively manage and operate the transportation system in order to achieve a wide range of system goals. These goals go beyond congestion relief to encompass safety, freight movement, transportation security, and reliability of system performance. System management and operations is vital to sustaining the value to the public of investments in the transportation system and meeting public expectations. The AASHTO Publication "The 21st Century Operations-Oriented State DOT" presents a vision of how state department of transportation (DOTs) can address transportation system management and operations and the characteristics of a comprehensive program for managing and operating the system. The major barriers to achieving this vision are institutional and there are additional barriers external to the DOT. Research is needed to help a state DOT determine how proactively they should manage and operate the multimodal transportation system, often in collaboration with other agencies, and then chart a course to deal with the constraints they face. Such research would also help them continuously improve their core business practice of transportation system management and operations as customer expectations and new capabilities evolve. The objective of this research is to create a strategic guide to developing, evolving, and sustaining transportation system management and operations as a core business practice of state DOTs. This core business practice should be enabled by institutional mechanisms such as organizational structure, resource and workforce management, change management, and system performance monitoring. The guide should be suitable for publication by AASHTO.
KW  - Highway operations
KW  - Mobility
KW  - Multimodal transportation
KW  - Strategic planning
KW  - Sustainable development
KW  - Traffic safety
KW  - Transportation planning
KW  - Transportation system management
UR  - http://www.trb.org/TRBNet/ProjectDisplay.asp?ProjectID=2488
UR  - https://trid.trb.org/view/1232608
ER  - 

TY  - ABST
AN  - 01464273
TI  - Accelerating the Rate of Innovation Among State DOTs
AB  - Continuing innovation in the practices of U.S. transportation agencies has brought substantial benefits to the nation. Examples of beneficial innovation range from new materials used in pavements and structures, to new ways of collecting and analyzing information about transportation system users and the environment in which the system operates, to new ways of funding the investments needed to improve public safety and efficiency of travel. Beneficial innovation occurs in any field when new ideas are disseminated and widely adopted by practitioners. Experience in many fields illustrates that expanding the extent of information exchange among practitioners and increasing the rate of the exchange facilitate innovation. A variety of means have been used to identify quickly new ideas that may usefully be applied in many contexts and to make those ideas available to the people and institutions that can use them. Direct personal contact among professionals in a field, for example, is perhaps the oldest of these means and widely agreed to be particularly valuable. NCHRP Projects 20-36 Highway Research and Technology--International Information Sharing and 20-68A U. S. Domestic Scan Program are two currently active examples of efforts by the American Association of State Highway and Transportation Officials (AASHTO), the Federal Highway Administration (FHWA), The Transportation Research Board (TRB), and others to facilitate technology transfer and innovation through personal contact. A "scan" approach typically entails field visits to observe promising new practices, identify pertinent development and application issues, and assess appropriate technology transfer opportunities and methods. The scan visit focuses on face-to-face discussion of current experience, providing opportunities for a uniquely rich exchange of information that is difficult or impossible to replicate through written materials, telephone conversations, and e-mail correspondence. While scan visits are a productive means for spreading information and innovation, the primary exchange occurs with the people who make the visit. The NCHRP's scan projects include efforts to encourage scan-team members to expand the circle of information exchange through preparation and dissemination of a report of each scan, publications in trade and professional journals, conferences, and peer-to-peer forums, but the effectiveness is these efforts inevitably is limited. The NCHRP and others continue to seek both ways to enhance the effectiveness of scans and alternatives to scans as a very effective means for accelerating innovation among transportation agencies. The objectives of this project will be to explore (1) new ways (for example, emailed publications; webinar, blog, wiki, syndication, or other web-based instruments; sponsored innovation gatekeepers) to more productively disseminate scan results (e.g., webinars) and (2) alternatives to travel-based scans. Individual research and development activities will be undertaken as sub-projects. In addition, activities associated with specific scan topics may be designed to advance the objectives of this project.
KW  - Information management
KW  - Information technology
KW  - State departments of transportation
KW  - Technological innovations
KW  - Technology transfer
UR  - http://www.trb.org/TRBNet/ProjectDisplay.asp?ProjectID=2657
UR  - https://trid.trb.org/view/1232502
ER  - 

TY  - ABST
AN  - 01461764
TI  - Best Practices in Transportation Planning
AB  - The purpose of this project is to examine the way in which states and Metropolitan Planning Organizations (MPOs) have responded to SAFETEA-LU requirements and to identify best practices in transportation planning, specifically in the areas of performance measures, environmental mitigation, long range transportation planning and fiscal  constraint in long range transportation planning. This information can be used to assist transportation officials across the nation in improving their transportation planning processes and outcomes. The performance measures task can  also help the Federal Highway Administration (FHWA) to propose new approaches to planning requirements to be included in the new transportation authorization legislation and to improve ongoing oversight and technical assistance processes. his work builds on previous work the Volpe National Transportation Systems Center (Volpe Center) has been conducting for FHWA under the Transportation Planning Capacity Building (TPCB) Program. One of the key objectives of TPCB are to gather and disseminate examples of effective transportation planning practices. The work also builds on support the Volpe Center has been providing to FHWA and the Federal Transit Administration (FTA) on oversight and certification and on the experience and expertise of the Volpe Center staff in the areas of environmental streamlining, stewardship and performance measurement.
KW  - Best practices
KW  - Environmental mitigation
KW  - Fiscal policy
KW  - Long range planning
KW  - Metropolitan planning organizations
KW  - Performance measurement
KW  - Research projects
KW  - Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users
KW  - Transportation planning
UR  - https://trid.trb.org/view/1229984
ER  - 

TY  - RPRT
AN  - 01131243
AU  - Ivan, John N
AU  - Sadek, Adel W
AU  - Zhou, Hongmei
AU  - Ranade, Surang
AU  - University of Connecticut, Storrs
AU  - New England Transportation Consortium
AU  - Federal Highway Administration
TI  - Warrants for Exclusive Left Turn Lanes at Unsignalized Intersections and Driveways
PY  - 2009/02/12/Final Report
SP  - 133p
AB  - Accommodating left turns at unsignalized intersections is one of the most challenging problems in traffic engineering. Over the last forty years, a small number of studies developed guidelines for traffic engineers to help in deciding when a left turn lane is warranted for a given situation. Building on these previous attempts, this report describes the development of a refined decision support system (DSS) for assessing the likely benefits of left-turn lane installations as an aid to deciding whether a left-turn lane is warranted. The developed DSS is designed to predict these likely benefits based on several measures including delay savings, reductions in percent stops, increases in fuel efficiency, and reductions in emissions. The first step in developing the DSS was to use microscopic simulation to model several real-world unsignalized intersections with different geometric configurations and located in different area types. After carefully calibrating these models, several scenarios covering a wide range of operational conditions were simulated. The output from these simulation runs was then used to train a set of Multi-layer Perceptron Neural Networks (NNs), and to generalize the results from the models’ runs. The NNs were then incorporated into a DSS that can help an analyst quantify the impacts of a proposed new development as well as estimate the benefits of left-turn lane installations. The report also presents an investigation of the safety effects of exclusive left turn lane installation at unsignalized intersections. Crash prediction models were estimated using crash and volume data from intersections without left turn lanes by intersection category and crash category. Intersections throughout Connecticut were selected, representing six different types of intersections based on rural versus urban location, number of approach legs and number of through lanes on the main road. Negative binomial modeling was used with generalized estimation equations to account for the correlation among the crash counts for an intersection through the years. The expected number of crashes was predicted using the prediction models for intersections with left turn lanes assuming no left turn lanes were present. If the observed crash counts were significantly lower than the predicted, then there was evidence that the left turn lane created a safer condition. The results of comparing the observed and predicted crashes showed that the intersections were safer for same direction crashes when left turn lanes were installed, except for those on urban two lane roads, at which no safety effect is discernible.
KW  - Connecticut
KW  - Crash data
KW  - Crash risk forecasting
KW  - Decision support systems
KW  - Highway safety
KW  - Left turn lanes
KW  - Traffic safety
KW  - Traffic volume
KW  - Unsignalized intersections
KW  - Warrants (Traffic control devices)
UR  - http://www.uvm.edu/~transctr/pdf/netc/netcr72_05-7.pdf
UR  - https://trid.trb.org/view/890792
ER  - 

TY  - ABST
AN  - 01549592
TI  - Research Program Design---Administration of Highway and Transportation Agencies. Implementable Strategies for Shifting to Direct Usage-Based Charges for Transportation Funding
AB  - Road-user charges based on vehicle-miles traveled (VMT) are considered by a number of groups to be a potentially viable alternative to motor-vehicle fuel taxes as a primary source of revenue to fund the nation's highway system. The concept has been the subject of notable research (for example, studies conducted by the State of Oregon and the University of Iowa) and its implications for public policy considered by a number of groups such as the TRB Committee for the Study of the Long-Term Viability of Fuel Taxes for Transportation Finance and the AASHTO Board of Directors. (Reports of these two groups' thinking on the subject are available at http://onlinepubs.trb.org/Onlinepubs/sr/sr285.pdf and http://www.transportation.org/sites/policy_docs/docs/viii.pdf.) While such studies have found the concept to be promising, they also have highlighted challenges. New communications and information technology must be installed to enable VMT charges to be implemented fully and public acceptance has yet to be proven. Even with public support, years may be required for the new technology to be deployed throughout the vehicle fleet and highway network. Recent declines in fuel-tax revenues and the impending expiration of the SAFETEA-LU legislation in September 2009 are prominent among motivations for policy makers to consider changes in how we pay for highway construction and maintenance. Those who envision that VMT charges may be adopted as a long-term means for generating revenues seek interim mechanisms which can be quick to implement, acceptable to the public, and effective as a transition step toward fully-developed VMT charges that account for miles traveled, roads used, time-of-day, vehicle weight and emissions, and other factors influencing the cost of service. AASHTO is working to ensure that the various issues surrounding VMT charges are fully explored. However, there is considerable interest among policy makers in ways that a move toward VMT fees might be very quickly implemented both to raise revenues in the near term and to facilitate a transition to sustainable alternatives to fuel taxes as a primary revenue source. Senator Barbara Boxer (D-CA) has suggested, for example, that a VMT fee that is collected annually (or semi-annually, quarterly, or bi-annually) along with existing vehicle registration or inspection fees could provide an immediate means for revenue collection. For such a fee to be successfully implemented, attention must be given to ensuring its ease and reasonable costs of administration, low burden on road users, public and political acceptance of the concept, variations in legal and political situations among states, and availability of enabling technology. The objectives of this research are to (1) identify and evaluate possibly viable alternative mechanisms for assessing and collecting VMT fees that can be developed and implemented within the near term, 2010 through 2015; (2) propose a practical strategy--for example, considering political and institutional as well as economic and financial issues to be resolved--for implementing a mechanism that will have a high likelihood of sustainable success nationwide; (3) describe the immediate actions necessary to achieve implementation, and (4) identify a longer-term strategy for making a smooth and effective transition from the proposed immediately-implementable mechanism to a robust and sustainable system of VMT-based user fees and an approach to monitoring progress. While analysis and forecasting of VMT trends are beyond the scope of this project, the research must be conducted with consideration for the likely short- and longer-term viability of VMT fees as a significant source of revenue for financing the nation's highway system for the foreseeable future.
KW  - Financial analysis
KW  - Fuel taxes
KW  - Information technology
KW  - Public acceptability
KW  - Revenues
KW  - Road construction
KW  - Vehicle miles of travel
UR  - http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=2626
UR  - https://trid.trb.org/view/1339746
ER  - 

TY  - RPRT
AN  - 01493381
AU  - Schmidt, Jennifer D
AU  - Sicking, Dean L
AU  - Faller, Ronald K
AU  - Lechtenberg, Karla A
AU  - Holloway, James C
AU  - University of Nebraska, Lincoln
AU  - Mid-America Transportation Center
AU  - Iowa State University, Ames
AU  - Federal Highway Administration
TI  - Analysis of Existing Work-Zone Devices with MASH Safety Performance Criteria
PY  - 2009/02/04/Final Report
SP  - 391p
AB  - Crashworthy, work-zone, portable sign support systems accepted under National Cooperative Highway Research Program (NCHRP) Report No. 350 were analyzed to predict their safety performance according to the Test Level 3 (TL-3) Manual for Assessing Safety Hardware (MASH) evaluation criteria. An analysis was conducted to determine which hardware parameters of sign support systems would likely contribute to the safety performance with MASH. The accuracy of the method was evaluated through full-scale crash testing. Four full-scale crash tests were conducted with a pickup truck. Two tall-mounted, sign support systems with aluminum sign panels failed the MASH criteria due to windshield penetration. One low-mounted system with a vinyl, roll-up sign panel failed the MASH criteria due to windshield and floorboard penetration. Another low-mounted system with an aluminum sign panel successfully met the MASH criteria. Four full-scale crash tests were conducted with a small passenger car. The low-mounted tripod system with an aluminum sign panel failed the MASH criteria due to windshield penetration. One low-mounted system with aluminum sign panel failed the MASH criteria due to excessive windshield deformation, and another similar system passed the MASH criteria. The low-mounted system with a vinyl, roll-up sign panel successfully met the MASH criteria. Hardware parameters of work-zone sign support systems that were determined to be important for failure with MASH include sign panel material, the height to the top of the mast, the presence of flags, sign-locking mechanism, base layout and system orientation. Flowcharts were provided to assist manufacturers when designing new sign support systems.
KW  - AASHTO Manual for Assessing Safety Hardware
KW  - Crashworthiness
KW  - Highway safety
KW  - Impact tests
KW  - Materials
KW  - Passenger cars
KW  - Pickup trucks
KW  - Sign supports
KW  - Work zone traffic control
KW  - Work zones
UR  - http://publications.iowa.gov/14961/1/IA_DOT_SWZDI_TPF5-081_Schmidt_Mash_report_red.pdf
UR  - https://trid.trb.org/view/1262148
ER  - 

TY  - ABST
AN  - 01464466
TI  - Next Generation Transportation Pooled Fund (TPF) Website
AB  - The existing transportation pooled fund (TPF) website was developed several years ago. Based on discussions with various levels of government and in cooperation with AASHTO's Research Advisory Committee (RAC) it is felt that an upgrade to the TPF website is necessary. The upgrade should enhance capabilities, expand the usage and functionality of the existing TPF website, and include the development of new templates and tools. A business model approach should be used when upgrading the website to assure the core capabilities of the entire research website are examined. Prior to actually funding an upgrade to the TPF website, an analysis of the website's current and future business processes and procedures should be reviewed at a strategic level. Looking at existing processes and systems from a strategic level will help identify gaps and opportunities and provide a strategic formation of the new website without overlooking the smallest detail. The development of TPF website business model would provide long-lasting value for the website customers. The business model and requirements that support the new and existing mission critical functions of the TPF website then can be incorporated into the design and deployment of a new TPF website. The implementation of the new FHWA SP&amp;R Financial Accounting Procedures has increased the urgency of a new and improved TPF website. The need for additional information on the financial status and progress being made on SP&amp;R pooled fund research projects via the TPF webite is essential.</font></span></div>
KW  - Information technology
KW  - Next generation design
KW  - Pooled funds
KW  - Research
KW  - Strategic planning
KW  - Transportation planning
KW  - Websites (Information retrieval)
UR  - http://www.trb.org/TRBNet/ProjectDisplay.asp?ProjectID=2515
UR  - https://trid.trb.org/view/1232696
ER  - 

TY  - ABST
AN  - 01464483
TI  - Road Pricing, Public Perceptions and Program Development
AB  - The current system of funding our roads and highways does not provide sufficient capacity or quality of service for all who want to use them, and traffic congestion has grown to such an extent that building new roads by itself will not solve the problem. Direct charging for road use in major metropolitan areas (where prices vary by level of demand) has been proven to enable traffic flows at posted speed limits and could maintain transportation funding at current levels. Recent research has shown that the public and key transportation stakeholders do not have a sense of the comparative costs and benefits of various solutions to traffic congestion, particularly road pricing. Recent research into public opinion of tolling and road pricing indicates that supportive attitudes increase when more information is made available. To affect stakeholders' and the public's attitudes and behavior regarding road pricing, a commitment would have to be made to implement a long-term national public education initiative. This research effort would build upon past research to provide the underpinnings for such an initiative. Public officials, technical experts, and advocates on either side of the tolling and road pricing issue would use the information gleaned from this research to develop improved messages and techniques for communicating about road pricing with their constituents. </font></span></div>
KW  - Benefit cost analysis
KW  - Quality of service
KW  - Road pricing
KW  - Speed limits
KW  - Stakeholders
KW  - Traffic congestion
UR  - http://www.trb.org/TRBNet/ProjectDisplay.asp?ProjectID=2499
UR  - https://trid.trb.org/view/1232713
ER  - 

TY  - RPRT
AN  - 01128368
AU  - Volpe National Transportation Systems Center
AU  - Research and Innovative Technology Administration
AU  - Federal Highway Administration
TI  - Evaluation of the Focused Approach to Pedestrian Safety Program
PY  - 2009/02/02
SP  - 51p
AB  - This report summarizes the results of an evaluation of the Federal Highway Administration (FHWA) Focused Approach to Pedestrian Safety Program. The study was done by the Volpe National Transportation Systems Center at the request of the FHWA Office of Safety (HSA). Five of the 19 “focus” locations were chosen for this evaluation based on geographic diversity, number and types of Program activities, and the availability of data about Program implementation. The study consisted of semistructured telephone interviews with 29 pedestrian safety stakeholders (mostly from government agencies) across the five locations.
KW  - Evaluation and assessment
KW  - Focused Approach to Pedestrian Safety Program (Federal Highway Administration)
KW  - Interviewing
KW  - Pedestrian safety
KW  - Safety programs
KW  - Stakeholders
UR  - http://ntl.bts.gov/lib/35000/35300/35359/efapsp020509.pdf
UR  - https://trid.trb.org/view/888838
ER  - 

TY  - ABST
AN  - 01549302
TI  - The Guayule Plant: A Renewable, Domestic Source of Binder Materials for Flexible Pavement Mixtures
AB  - The guayule (pronounced 'why-YOU-lee') plant grows in arid and semi-arid regions (e.g. the southwestern U.S.) and is a source of natural rubber. It was cultivated and processed during the World War II rubber shortage and is currently being processed primarily for the manufacture of hypo-allergenic latex (e.g. medical gloves, personal hygiene products). Depending on the process, many materials can be extracted from guayule. However, there are three basic products: rubber, resin, and bagasse. The rubber and resin (biopolymers) are of particular interest as they could prove to be renewable binder materials for flexible pavement mixtures. Limited preliminary testing showed that the resin could potentially be used as a recycling agent (viscosity modifier) when designing flexible pavement mixtures with a high percentage of reclaimed asphalt pavement (RAP), a small percentage of processed roofing shingles, and some virgin aggregate. The concept is to design a flexible pavement mixture produced with little to no virgin petroleum-based material. Due to the rising price of crude oil, flexible pavement costs have increased significantly. In regard to the concept, the potential impact on highway construction could be lower costs. A thorough experimental program is necessary to assess the limits of the use of the guayule rubber and resin in the context of this concept. Additionally, the guayule processing industry could benefit through the opening of another market for its products. Maybe more importantly, national security could be enhanced by decreasing the dependence on foreign oil.
KW  - Binders
KW  - Flexible pavements
KW  - Materials
KW  - Mixtures
KW  - National Cooperative Highway Research Program
KW  - Natural resources
KW  - Natural rubber
KW  - Pavement mixtures
KW  - Rubber
UR  - http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=2703
UR  - https://trid.trb.org/view/1339618
ER  - 

TY  - ABST
AN  - 01461938
TI  - Structural Testing of Field-Cast UHPC Connections between Precast Bridge Deck Level Elements
AB  - UHPC is being considered for use in bridge decks as a cast-in-place joint fill material between precast concrete elements. As part of the Federal Highway Administration's (FHWA&amp;rsquo;s) ongoing UHPC research effort and in support of a UHPC deployment effort by the New York State Department of Transportation (NYSDOT), FHWA has initiating a testing program focused on the behavior of field cast UHPC connections between precast bridge deck elements. The six slab specimens are designed to model two different situations wherein UHPC might be used as a joint fill or closure pour material. Four of the slabs are designed to mimic the types of connections that might occur between precast bridge deck elements with the joint being perpendicular to the length of the bridge. The remaining two slabs are designed to mimic the type of connection that might occur between the flanges of a pair of deck-bulb-Tee prestressed girders with the joint being parallel to the length of the bridge. Each of these slabs will be tested for two different behaviors; namely performance under cyclic service level loads and performance under monotonic ultimate loads. Loads will be applied vertically along the midline of the span through a 10 inch by 20 inch load patch which simulates a truck wheel load. After the conclusion of the cyclic testing, the slabs will be loaded monotonically to failure. Assessments of specimen cracking and joint performance will be completed throughout the testing.
KW  - Bridge decks
KW  - Cast in place concrete
KW  - Cracking
KW  - Joint fillers
KW  - Performance evaluations
KW  - Research projects
KW  - Slabs
UR  - https://trid.trb.org/view/1230158
ER  - 

TY  - RPRT
AN  - 01548631
AU  - Kwon, Taek
AU  - Weidemann, Ryan
AU  - University of Minnesota, Duluth
AU  - Minnesota Department of Transportation
AU  - Michigan Department of Transportation
AU  - Federal Highway Administration
TI  - Solar/Wind Hybrid Renewable Power Generator for a Dynamic Message Sign
PY  - 2009/02//Final Report
SP  - 103p
AB  - This report describes the development and field test results of a solar/wind Hybrid Renewable Power Generator (HRPG) that powers a typical highway Dynamic Message Sign (DMS). This report is composed as follows: Chapter 2 describes a step-by-step design procedure of the HRPG implemented. Since solar radiation and winds are highly dependent upon the location and season, a careful analysis must be performed based on the statistics of weather data. The details on how to estimate the power generation using the available solar/wind maps are shown. The estimate of wind and solar resources and the power requirement of the DMS are then used for designing the solar/wind HRPG and computing the battery bank requirement. In the design procedure, part selection is important and the details are provided. Chapter 3 describes how the HRPG was installed. This includes installation of the pole, mounting the solar panels and wind turbine, battery and controller cabinet installation, controller setups, and the total cost of the HRPG. Data was collected from the HRPG via the data logging system. A total of 509 days worth of data was collected. Chapter 4 analyzes this data and also summarizes the testing of the DMS. Chapter 5 describes a generalized design procedure that needs to be considered when designing a HRPG for an application. Finally, Chapter 6 describes conclusions of this project.
KW  - Costs
KW  - Data analysis
KW  - Data collection
KW  - Design
KW  - Electric batteries
KW  - Electric generators
KW  - Installation
KW  - Solar power generation
KW  - Variable message signs
KW  - Weather
KW  - Wind power generation
UR  - http://enterprise.prog.org/Projects/2002_2009/finalreports/D3-DMS-SolarWind-FinalReport-V9.pdf
UR  - https://trid.trb.org/view/1333234
ER  - 

TY  - RPRT
AN  - 01473090
AU  - Anderson, Douglas I
AU  - Fazio, Michael
AU  - Leonard, Blaine
AU  - Wakil, Abdul
AU  - Berg, Kenneth
AU  - Sharp, Richard
AU  - Anderson Transportation Consulting
AU  - Utah Department of Transportation
AU  - Federal Highway Administration
TI  - Research Division Manual of Instruction
PY  - 2009/02//Final Report
SP  - 130p
AB  - This manual documents the Research and Development Program at the Utah Department of Transportation (UDOT). It describes the policies and procedures driving the program, the division’s organization and staffing, how the customers and stakeholders are supported, and how the program interfaces with the strategic goals of the Department. The manual describes the processes used to select and conduct research projects, how the Annual Work Program is prepared, and discusses the major funding sources supporting the program. It outlines the Development Program including the Technology Transfer, Experimental Features, New Products Evaluation, Implementation, and Library Sciences initiatives.
KW  - Financing
KW  - Manuals
KW  - Organization
KW  - Policy
KW  - Research projects
KW  - Strategic planning
KW  - Technology transfer
KW  - Utah Department of Transportation
UR  - http://utah.ptfs.com/awweb/awarchive?type=file&item=24009
UR  - https://trid.trb.org/view/1243727
ER  - 

TY  - RPRT
AN  - 01456909
AU  - Tadros, Maher K
AU  - Morcous, George
AU  - University of Nebraska, Lincoln
AU  - Nebraska Department of Roads
AU  - Mid-America Transportation Center
AU  - Federal Highway Administration
AU  - Federal Transit Administration
AU  - Research and Innovative Technology Administration
TI  - Application of Ultra-High Performance Concrete to Bridge Girders
PY  - 2009/02//Final Report
SP  - 86p
AB  - Ultra-High Performance Concrete (UHPC) is a new class of concrete that has superior performance characteristics compared to conventional concrete. The enhanced strength and durability properties of UHPC are mainly due to optimized particle gradation that produces a very tightly packed mix, extremely low water to powder ratio, and use of steel fibers. The unique strength and durability properties of UHPC make it an attractive material for precast prestressed bridge girder construction. However, commercial UHPC mixes currently available in the U.S. market cost about 10 times the cost of conventional concrete mixes, in addition to the need for special mixing and curing procedures that are not convenient to most precasters. The general objective of this project is to promote the use of UHPC in bridge construction. The specific objectives include: 1) review the various UHPC mixes developed in North America, Europe, and Japan and compare them in terms of economics and performance characteristics; 2) develop non-proprietary UHPC mix that are optimized in terms of the total cost of production while providing a final compressive strength of at least 18 ksi; 3) evaluate the mechanical properties of the developed mixes; and 4) investigate the application of the developed mixes to standard precast prestressed concrete bridge I-girders. The developed mixes consist of type III cement, fine sand, class C fly ash, silica fume, high range water reducer, and water. Steel fibers are eliminated due to their high cost and Grade 80 ksi welded wire reinforcement (WWR) is used instead to substitute for the loss in the tensile/shear capacity. The results of the laboratory tests and the full-scale girder tests indicated that the developed mixes are attainable using practical and affordable mixing and curing procedures and their mechanical properties are superior to those of the mixes currently used in Nebraska.
KW  - Bridge construction
KW  - Concrete bridges
KW  - Costs
KW  - Girders
KW  - Laboratory tests
KW  - Mechanical loads
KW  - Nebraska
KW  - Precast concrete
KW  - Prefabricated bridges
KW  - Ultra high performance concrete
UR  - https://trid.trb.org/view/1224014
ER  - 

TY  - RPRT
AN  - 01448594
AU  - Ayres Associates, Incorporated
AU  - Federal Highway Administration
AU  - National Highway Institute
TI  - Stream Instability, Bridge Scour, and Countermeasures: A Field Guide for Bridge Inspectors
PY  - 2009/02
SP  - 49p
AB  - The bridge inspector must understand the behavior of rivers in order to recognize changing conditions associated with unstable streams or scour at bridge foundations that may threaten the stability of the bridge.  This field guide contains information on the following:  stream instability; scour at bridges; National Bridge Inventory (NBI), coding, and plans of action; countermeasures; and flood watch and bridge closure.
KW  - Bridge closure
KW  - Bridges
KW  - Countermeasures
KW  - Floods
KW  - Guidelines
KW  - Inspection
KW  - National Bridge Inventory
KW  - Scour
KW  - Streams
UR  - https://trid.trb.org/view/1215851
ER  - 

TY  - RPRT
AN  - 01383127
AU  - Federal Highway Administration
TI  - RSA toolkit
PY  - 2009/02//v1.0
SP  - 1 CD ROM
AB  - This CD-ROM houses all of the assorted materials created under the Road Safety Audit (RSA) Program.  The toolkit includes the following sections: 1. RSA videos; 2. guidelines; 3. case studies; 4. program contacts; 5. sample reports; 6. program web links; 7. RSA training information; 8. RSA peer-to-peer program information.
KW  - Case studies
KW  - Case study
KW  - Education
KW  - Education
KW  - Highway safety
KW  - Road safety
KW  - Safety audit
KW  - Usa
UR  - https://trid.trb.org/view/1151069
ER  - 

TY  - RPRT
AN  - 01160549
AU  - Ibrahim, Firas I Sheikh
AU  - Federal Highway Administration
TI  - Load Rating Guidance and Examples for Bolted and Riveted Gusset Plates in Truss Bridges
PY  - 2009/02
SP  - 50p
AB  - The Federal Highway Administration (FHWA) Gusset Plate Evaluation Guidance – Part A and Part B with Illustrated Examples has been published to provide guidelines to bridge owners in meeting the requirements of the FHWA Technical Advisory T 5140.29 Load-carrying Capacity Considerations of Gusset Plates in Non-load-path Redundant Steel Truss Bridges, dated January 15, 2008. The FHWA Guidance is based on the latest edition of the AASHTO LRFD, LRFR and LFR, and comments from many bridge professionals. It represents minimum requirements. This guidance will be updated as new information becomes available from the FHWA-AASHTO joint study on the Load and Resistance Factor Design and Rating of Riveted, Bolted, and Welded Gusset-Plate Connections for Steel Bridges.
KW  - AASHTO LRFD Bridge Design Specifications
KW  - Bearing capacity
KW  - Guidelines
KW  - Gusset plates
KW  - Load and resistance factor design
KW  - Load factor
KW  - Steel bridges
KW  - Structural connection
KW  - Truss bridges
UR  - http://bridges.transportation.org/Documents/FHWA-IF-09-014LoadRatingGuidanceandExamplesforGussetsFebruary2009rev3.pdf
UR  - https://trid.trb.org/view/921262
ER  - 

TY  - RPRT
AN  - 01158464
AU  - Tonon, Fulvio
AU  - Youn, Heejung
AU  - Raibagkar, Anay P
AU  - University of Texas, Austin
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Effect of Verification Cores on Tip Capacity of Drilled Shafts
PY  - 2009/02//Technical Report
SP  - 397p
AB  - This research addressed two key issues:  (1) Will verification core holes fill during concrete backfilling? If so, what are the mechanical properties of the filling material? In dry conditions, verification core holes always completely fill with concrete whose compressive strength is of equal strength to the concrete in the drilled shaft column. In wet conditions, the bottom half of the verification core hole fills with non-cemented gravel-sand mixture (φ = 52°), while the upper half of the verification core hole fills with weakly cemented material (Vp = 2000 fps).  (2) When drilling in materials, such as shales, susceptible to degradation: does this degradation specifically around shaft verification core holes affect point bearing capacity? The shear strength of Del Rio Clay and Eagle Ford Shale is not affected by drying-duration, but is related to water content; the shear strength of Taylor Marl and Navarro Shale decreases considerably as drying-duration increases. The elastic modulus of all four clay shales drops significantly when clay shales are dried and then wetted. When shales are first dried and then rewetted and concrete is poured in the wet, the verification core hole reduces tip capacity by a maximum of 10% (14% for Taylor Marl). In all other cases, the verification core does not decrease the tip capacity.
KW  - Bearing capacity
KW  - Clay
KW  - Cores (Specimens)
KW  - Drilled shafts
KW  - Marl
KW  - Shale
UR  - http://www.utexas.edu/research/ctr/pdf_reports/0_5825_1.pdf
UR  - https://trid.trb.org/view/919256
ER  - 

TY  - RPRT
AN  - 01155878
AU  - Irwin, Lynne H
AU  - Orr, David P
AU  - Atkins, Daniel
AU  - Cornell University
AU  - Federal Highway Administration
TI  - FWD Calibration Center and Operational Improvements: Redevelopment of the Calibration Protocol and Equipment
PY  - 2009/02//Final Report
SP  - 261p
AB  - The objective of this study is to upgrade the existing falling weight deflectometer (FWD) calibration system to make calibration sustainable for the next decade without a loss of quality while ensuring any new procedures are compatible with all brands of FWDs sold in the United States. This involves upgrading the hardware and software used in calibration to take advantage of improvements in technology. The primary result of the FWD calibration procedure is to obtain “gain factors” used to correct FWD load cell and deflection sensor data to agree with the calibration instrumentation. Changes incorporated in the new FWD calibration procedure include: replacing the reference Linear Variable Differential Transducer (LVDT) with an accelerometer for deflection sensor calibration, development of a multiple sensor stand to allow calibration of all deflection sensors simultaneously, updating the calibration software to a modern programming language with the ability to read native data formats from each brand of FWD, and the use of modern data acquisition techniques to eliminate sensitivity problems from the older SHRP FWD calibration protocol. The time to complete an FWD calibration was greatly reduced. This report outlines the updated procedures and provides details about the equipment and methods needed to perform the updated protocol.
KW  - Accelerometers
KW  - Calibration
KW  - Data collection
KW  - Deflection
KW  - Falling weight deflectometers
KW  - Linear variable differential transducers
KW  - Pavements
UR  - http://www.pooledfund.org/documents/TPF-5_039/FWD_Cal_Report_2009_Mar_8.pdf
UR  - https://trid.trb.org/view/916535
ER  - 

TY  - RPRT
AN  - 01142623
AU  - Long, James H
AU  - Hendrix, Joshua
AU  - Jaromin, David
AU  - University of Illinois, Urbana-Champaign
AU  - Wisconsin Department of Transportation
AU  - Federal Highway Administration
TI  - Comparison of Five Different Methods for Determining Pile Bearing Capacities
PY  - 2009/02//Final Report
SP  - 176p
AB  - The purpose of this study is to assess the accuracy and precision with which five methods can predict axial pile capacity. The methods are the Engineering News formula currently used by Wisconsin Department of Transportation (WisDOT), the FHWA-Gates formula, the Pile Driving Analyzer, the method developed by the Washington State DOT (WSDOT), and further analysis conducted on the FHWA-Gates method to improve its ability to predict axial capacity. Improvements were made by restricting the application of the formula to piles with axial capacity less than 750 kips, and by applying adjustment factors based on the pile being driven, the hammer being used, and the soil into which the pile is being driven. Two databases of pile driving information and static or dynamic load tests were used to evaluate these methods. Analysis is conducted to compare the impact of changing to a more accurate predictive method, and incorporating load and resistance factor design (LRFD). The results of this study indicate that a “corrected” FHWA-Gates and the WSDOT formulas provide the greatest precision. Using either of these two methods and changing to LRFD should increase the need for foundation (geotechnical) capacity by less than 10 percent.
KW  - Accuracy
KW  - Bearing capacity
KW  - Formulas
KW  - Load and resistance factor design
KW  - Load tests
KW  - Mathematical prediction
KW  - Pile driving
KW  - Piles (Supports)
KW  - Precision
UR  - http://wisdotresearch.wi.gov/wp-content/uploads/07-04pilebearingcapacities-f1.pdf
UR  - http://wisdotresearch.wi.gov/wp-content/uploads/07-04pilebearingcapacities-f1.pdf
UR  - https://trid.trb.org/view/902909
ER  - 

TY  - RPRT
AN  - 01142395
AU  - Jayawickrama, Priyantha Warnasuriya
AU  - Merrick, Michael E
AU  - Senadheera, Sanjaya P
AU  - Texas Tech University, Lubbock
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Develop a New Testing and Evaluation Protocol to Assess Flexbase Performance Using Strength of Soil Binder
PY  - 2009/02//Technical Report
SP  - 125p
AB  - This research involved a detailed laboratory study of a new test method for evaluating road base materials based on the strength of the soil binder. In this test method, small test specimens (5 in. length and 0.75 in. square cross section) of binder material are load tested to obtain a flexural strength value. The laboratory study conducted in this research included material collected from 19 different sources. The results from the study demonstrated that good correlation can be established between the binder strength and 0-psi Texas Triaxial strength for certain types of base materials such as crushed limestone and materials treated with cement or flyash. However, the test method could not be used to measure the flexural strengths of many sand and gravel materials because these materials did not produce consistent data. The data obtained from repeatability analyses provided an average Coefficient of Variation (COV) of 12.6% for the base binder flexometer test and a COV of 23.2% for the 0-psi Texas Triaxial Test. The research effort also included the design and fabrication of a low cost, easy-to-operate prototype test device for the measurement of binder flexural strength. The reliability of the test equipment was verified by running parallel tests using another commercially available loading device.
KW  - Base course (Pavements)
KW  - Binders
KW  - Cement treated soils
KW  - Coefficient of variation
KW  - Crushed limestone
KW  - Flexural strength
KW  - Fly ash
KW  - Laboratory tests
KW  - Load tests
KW  - Test procedures
KW  - Triaxial shear tests
UR  - http://library.ctr.utexas.edu/pdf02/5873-1.pdf
UR  - https://trid.trb.org/view/902763
ER  - 

TY  - SER
AN  - 01142066
JO  - Civil Engineering Studies, Illinois Center for Transportation Series
PB  - University of Illinois, Urbana-Champaign
AU  - Al-Qadi, Imad L
AU  - Carpenter, Samuel
AU  - Leng, Zhen
AU  - Ozer, Hasan
AU  - Trepanier, James S
AU  - University of Illinois, Urbana-Champaign
AU  - Illinois Department of Transportation
AU  - Federal Highway Administration
TI  - Tack Coat Optimization for HMA Overlays: Accelerated Pavement Test
Report
PY  - 2009/02//Final Report
IS  - 09-035
SP  - 56p
AB  - Interface bonding between hot-mix asphalt (HMA) overlays and Portland cement concrete (PCC) pavements is one of the most significant factors affecting overlay service life. This study was performed to quantify the effects of HMA type, tack coat type, tack coat application rate, and PCC surface texture on the interface bonding and overlay performance through laboratory testing, accelerated pavement testing (APT), and numerical modeling. This report presents the outcomes of the APT, as well as the numerical modeling of pavement interfaces. The results of the laboratory testing are covered in a companion report. The APT built on and validated previously completed laboratory tests where an HMA overlay was placed on top of an existing PCC pavement having various surface textures including smooth, transverse tined, longitudinal tined, and milled. In addition, zebra sections were included to evaluate the effect of non-uniform tack coat application. Asphalt emulsion SS-1hP and cutback asphalt RC-70 were applied at three residual application rates, 0.02, 0.04, and 0.09 gal/yd2 (0.09, 0.18, and 0.41 L/m2); asphalt binder PG64-22 was applied at 0.04 gal/yd2 (0.41 L/m2). Two HMA designs, standard binder mix and moisture sensitive binder mix, were used along with the three tack coats. Twenty-five pavement test sections were constructed and loaded with the Accelerated Transportation Loading ASsembly (ATLAS) at the centerline. The tensile strains at the bottom of HMA, to quantify potential interface slippage, were measured for selective sections, and primary HMA rutting was analyzed for all sections. The APT results validated laboratory determined optimum tack coat application rate, which provided the lowest interface strain and surface rutting in the field. Both PG64-22 and SS-1hP showed better rutting resistance than RC-70. Milled PCC surface provided lower rutting than transverse-tined and smooth surfaces. The field testing also showed that PCC cleaning methods play an important role in the HMA-PCC bonding. Higher rutting depth was measured in sections with uneven tack coat distribution compared to that with uniform tack coat distribution. Field testing results don’t show enough evidence to prove that using a moisture-sensitive mix will result in higher HMA surface rutting.
KW  - Accelerated pavement tests
KW  - Bituminous overlays
KW  - Bonding
KW  - Hot mix asphalt
KW  - Optimization
KW  - Portland cement concrete
KW  - Tack coats
UR  - http://ntl.bts.gov/lib/31000/31000/31023/ICT-09-035.pdf
UR  - https://trid.trb.org/view/902076
ER  - 

TY  - RPRT
AN  - 01140583
AU  - Murrugarra, Ruth
AU  - Renna, Nicholas
AU  - Wallace, William A
AU  - Wojtowicz, Jeffrey M
AU  - Rensselaer Polytechnic Institute
AU  - New York State Department of Transportation
AU  - Federal Highway Administration
TI  - Post New York State Fair Performance Assessment
PY  - 2009/02//Final Task Report
SP  - 137p
AB  - The New York State (NYS) Fair project was a $200,000 effort sponsored by the Federal Highway Administration and the New York State Department of Transportation.  The project began in July 2007 and completed in February 2009; this included the times the 2007 and 2009 NYS Fair was in operation.  The goal of the project was to assess the traffic conditions at and in close proximity to the NYS Fairgrounds located in Syracuse, NY.  The reason this was important was due to a major interstate bridge replacement project that was located nearby the fairgrounds and that was planned to disrupt traffic for two years.  In order to accomplish the goals, six wireless solar powered RFID tag readers (E-ZPass) were deployed to collect and display vehicle travel times in real-time as well as collect other sources of data such as traffic counts on the surrounding road network.  In addition to the data collection efforts a traffic microsimulation model was built to mimic the conditions around the NYS Fair.  This model served as a tool for assessing possible improvements in the traffic flow from both an efficiency and safety point of view.
KW  - Data collection
KW  - E-ZPass
KW  - Highway operations
KW  - Highway traffic control
KW  - Microsimulation
KW  - New York State Fair
KW  - Real time information
KW  - Special events
KW  - Syracuse (New York)
KW  - Traffic analysis tools
KW  - Traffic counts
KW  - Traffic flow
KW  - Traffic models
KW  - Traffic safety
KW  - Travel time
UR  - http://www.nysdot.gov/divisions/engineering/technical-services/trans-r-and-d-repository/Z-01-02(4)_Combined.pdf
UR  - https://trid.trb.org/view/900967
ER  - 

TY  - RPRT
AN  - 01139985
AU  - Flanigan, Erin
AU  - Howard, Mark
AU  - Volz, Matt
AU  - Cambridge Systematics, Incorporated
AU  - Federal Highway Administration
TI  - Rural Interstate Corridor Communications Study Report to States
PY  - 2009/02//Final Report
SP  - 140p
AB  - Section 5507 of the Safe, Accountable, Flexible, Efficient Transportation Act: A Legacy for Users (SAFETEA-LU) directed the Secretary of Transportation, in cooperation with the Secretary of Commerce, State departments of transportation, and other appropriate State, regional, and local officials, to assess the feasibility of installing fiber optic cabling and wireless communication infrastructure along multistate Interstate System route corridors for improved communications services to rural communities along such corridors. This document is the second of two reports that explore the potential for the use of rural Interstate Highway corridor rights-of-way for the deployment of fiber optic cable and/or wireless communication infrastructure, across multiple States linked by the Interstate Highway system. The first document, the Rural Interstate Corridor Communications Study: Report to Congress, was submitted to Congress on August 18, 2008. This document, the Report to States, provides a summary of study resources available to the Corridor States to begin the process for possible deployment of high-speed telecommunications (HST) in the corridors in question. As part of the task to develop the Report to States, a preliminary backbone alignment plan for telecommunications has been developed. The report, a White Paper on the Preliminary Backbone Alignment, is included as an appendix to this Report to States. This preliminary backbone alignment report presents information related to the development of preliminary telecommunication infrastructure, alignments, and other supporting material developed by the study team to be utilized by the corridor States in the future. It addresses issues of constructability, scheduling and maintenance, environmental considerations, and utility accommodation policies.
KW  - Broadband
KW  - Fiber optics
KW  - High speed telecommunications
KW  - Highway corridors
KW  - Right of way (Land)
KW  - Rural highways
KW  - Wireless communication systems
UR  - http://www.ops.fhwa.dot.gov/publications/fhwahop09021/fhwahop09021.pdf
UR  - https://trid.trb.org/view/899354
ER  - 

TY  - RPRT
AN  - 01139273
AU  - Younce, Rick
AU  - Hopwood, Theodore
AU  - Palle, Sudhir
AU  - University of Kentucky, Lexington
AU  - Kentucky Transportation Cabinet
AU  - Federal Highway Administration
TI  - Experimental Painting of the I-64 Riverside Parkway in Louisville, KY
PY  - 2009/02//Final Report
SP  - 42p
AB  - The Kentucky Transportation Cabinet conducted a large-scale zone maintenance painting operation on 13 elevated steel bridges along the I-64 Riverside Parkway in Louisville, KY in 2007. That work included abrasive blast-cleaning and painting of steel underlying open deck joints on 3.2 miles of steel structures. The painting was performed by spray application of one coat of a calcium sulfonate alkyd coating. The painting covered an area of 237,060 ft2 of steel cleaned and painted at a unit cost of $15.82/ft2. The project incorporated a high level of containment as the existing coating possessed lead-based paints and the project was located in a densely populated area. The project was successfully completed in 4 months. Follow-on inspections conducted at 2 and 14 months respectively indicated that almost all of the zone painting was in good condition and performing satisfactorily.
KW  - Alkyd resins
KW  - Blast cleaning
KW  - Highway bridges
KW  - Joints (Engineering)
KW  - Louisville (Kentucky)
KW  - Maintenance
KW  - Painting
KW  - Steel structures
UR  - http://www.ktc.uky.edu/files/2014/09/KTC_09_02-KH59_07_1F-FINAL.pdf
UR  - https://trid.trb.org/view/899066
ER  - 

TY  - RPRT
AN  - 01138762
AU  - Harrison, Robert
AU  - Hutson, Nathan M
AU  - Prozzi, Jolanda P
AU  - Gonzalez, Juan J
AU  - McCray, John P
AU  - West, Jason R
AU  - University of Texas, Austin
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - The Impacts of Port, Rail, and Border Drayage Activity in Texas
PY  - 2009/02//Technical Report
SP  - 137p
AB  - This report examines Texas dray operations of interest to Texas Department of Transportation (TxDOT) planners. Chapter 1 provides background to the study and summarizes an earlier study report. Chapter 2 reports on a large drayage driver survey conducted at the Union Pacific Englewood intermodal terminal in Houston. Chapter 3 moves the study to the southern border and estimates annual dray vehicle miles of travel (VMT) for those dray vehicles that crossed the border in a northbound direction at the McAllen/Pharr, Laredo, and El Paso gateways in 2007. Chapter 4 stays in Laredo but moves to the Union Pacific intermodal terminal where a driver survey was conducted on August 11 and 12, 2008, to gain insight into the origins and destinations of containers coming into and out of the terminal. Chapter 5 measures dray impacts created by the movement of containers from Port of Houston Authority (POHA) terminals on the Houston highway network. The level of service (LOS) on the network serving the port is determined, using different volumes of dray vehicles. It also reports output from the EPA DrayFLEET emissions and activity model developed by the Tioga Group. Chapter 6 identifies potential strategies to mitigate adverse impacts associated with dray operations. The strategies cover terminal operations, dray fleet technologies, reducing interactions with other highway users, and identifying opportunities to divert dray traffic to other modes. Finally, Chapter 7 presents the conclusions and recommendations of the study.
KW  - Container traffic
KW  - Drayage
KW  - Intermodal terminals
KW  - Level of service
KW  - Origin and destination
KW  - Port of Houston
KW  - Ports of entry
KW  - Strategic planning
KW  - Terminal operations
KW  - Texas
KW  - Texas-Mexico Border region
KW  - Transborder traffic
KW  - Vehicle miles of travel
UR  - http://www.utexas.edu/research/ctr/pdf_reports/0_5684_1.pdf
UR  - https://trid.trb.org/view/899000
ER  - 

TY  - RPRT
AN  - 01135308
AU  - Shi, X
AU  - Fay, Laura
AU  - Gallaway, Chase
AU  - Volkening, Kevin
AU  - Peterson, Marijean M
AU  - Western Transportation Institute
AU  - Colorado Department of Transportation
AU  - Federal Highway Administration
TI  - Evaluation of Alternative Anti-Icing and Deicing Compounds Using Sodium Chloride and Magnesium Chloride as Baseline Deicers - Phase I
PY  - 2009/02
SP  - 294p
AB  - This project aims to evaluate potassium acetate, sodium acetate/formate-blend deicers, and potassium formate as alternative anti-icing and deicing compounds relative to sodium chloride (NaCl), salt-sand mixtures, and magnesium chloride (MgCl2) currently used by CDOT. Based on the literature review, deicers may pose detrimental effects to portland cement concrete infrastructure and asphalt pavement, cause corrosion damage to the transportation infrastructure, or have significant impacts on the environment. We conducted laboratory tests to evaluate the performance of several alternative deicers compared with traditional chloride-based deicers, including: SHRP ice melting, penetration and undercutting tests, differential scanning calorimetry tesst, and tribometer tests. The negative effects of deicers on metals and concrete were investigated both in the laboratory and in the field. It was estimated that even for highquality concrete, the implications of chloride-based deicers on the service life of steel-reinforced concrete might be significant. At the three field locations, water samples were collected periodically and the data showed no immediate impact from chloride-based deicers following application adjacent to waterways. We described a deicer composite index that would allow winter maintenance managers to numerically evaluate deicers based on their agency priorities or local needs and constraints.
KW  - Acetates
KW  - Anti-icing
KW  - Chemical properties
KW  - Colorado
KW  - Deicing chemicals
KW  - Ice prevention
KW  - Laboratory tests
KW  - Pavement maintenance
KW  - Performance evaluations
KW  - Winter maintenance
UR  - http://www.coloradodot.info/programs/research/pdfs/2009/antiicing.pdf/at_download/file
UR  - http://www.dot.state.co.us/Publications/PDFFiles/antiicing.pdf
UR  - https://trid.trb.org/view/894394
ER  - 

TY  - RPRT
AN  - 01135213
AU  - Middleton, D
AU  - Park, Eun Sug
AU  - Longmire, Ryan
AU  - Charara, Hassan A
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Improvements to Video Imaging Detection for Dilemma Zone Protection
PY  - 2009/02
SP  - 146p
AB  - The use of video imaging vehicle detection systems (VIVDS) at signalized intersections in Texas has increased significantly due primarily to safety issues and costs. Installing non-intrusive detectors at intersections is almost always safer than installing inductive loops due to greater separation between passing motorists and field crews installing the detectors. Other factors that have contributed to the increased usage of VIVDS include the flexibility offered in terms of adjusting detection zones (e.g., with lane reassignments), the ability to send an image of the traffic stream to a traffic operations center, and no damage to the pavement structure as with inductive loops. Despite these advantages, there are situations where VIVDS need further research to ensure safe operations. The objective of this research is to determine how well the current video imaging systems deployed by the Texas Department of Transportation (TxDOT) provide dilemma zone protection at high-speed signalized intersections. Findings of this research indicate that VIVDS is better suited for stop line detection than dilemma zone detection. It will usually require two cameras and dedicated upstream poles to ensure adequate performance at speeds of 50 mph or higher. VIVDS has some inherent weaknesses that increase the number of max-outs and minor street delays compared to point detectors.
KW  - Image processing
KW  - Loop detectors
KW  - Signalized intersections
KW  - Texas
KW  - Traffic control devices
KW  - Traffic safety
KW  - Traffic surveillance
KW  - Vehicle detectors
KW  - Video cameras
KW  - Video imaging detectors
UR  - http://tti.tamu.edu/documents/0-5774-1.pdf
UR  - https://trid.trb.org/view/894432
ER  - 

TY  - SER
AN  - 01132427
JO  - Civil Engineering Studies, Illinois Center for Transportation Series
PB  - University of Illinois, Urbana-Champaign
AU  - Mohammadian, Kouros
AU  - Takuriah, Piushimita
AU  - Rashidi, Taha H
AU  - University of Illinois, Chicago
AU  - Illinois Department of Transportation
AU  - Federal Highway Administration
TI  - Effectiveness of Transit Strategies Targeting Elderly People: Survey Results and Preliminary Data Analysis
PY  - 2009/02//Final Report
IS  - 09-033
SP  - 57p
AB  - The U.S. Department of Health and Human Services has shown that America’s senior population has been growing and will almost double by 2030. This trend continues to challenge researchers who are looking to increase seniors’ awareness or favorable views toward public transportation and researchers who are developing innovative public transportation alternatives for seniors. These alternatives will try to wean seniors from their reliance on cars, while not compromising other transit riders’ safety and comfort. The research team at the University of Illinois at Chicago undertook this study as a first step toward meeting this challenge. To collect information on seniors’ travel attributes and their opinions about Northeastern Illinois’ public transportation system and potential service alternatives, the research team developed a comprehensive survey, covering four common trip purposes (doctor visits, shopping trips, social or recreational travel, and work trips) and various travel modes. These modes included combinations of nonmotorized travel, auto use, and three commonly used public transportation modes (Metra, Pace, and the Chicago Transit Authority). The research team tested this survey on a small sample of respondents; modified it to maximize the number of accurate, unbiased responses; and sent it to 2,000 seniors who have resided in one of metropolitan Chicago’s six counties. Two hundred eighty seniors sent back complete and useful surveys that provided data for this study. Most of these seniors were unfamiliar with Northeastern Illinois’ public transportation system and did not view it as a driving alternative, partly because they view it as more hazardous than driving their own cars and less convenient than getting a ride from friends or family members. To help change these perceptions, the research team suggests that Northeastern Illinois’ public transit operators provide printed timetables and maps on their trains, buses, or stations; increase vehicle frequencies; provide real-time arrival information at stations and on cell phones; order more low floor and kneeling buses, clean their stations and vehicles better, and provide shuttle services specifically designed for seniors.
KW  - Aged
KW  - Awareness
KW  - Chicago Metropolitan Area
KW  - Convenience
KW  - Public transit
KW  - Safety
KW  - Strategic planning
KW  - Surveys
KW  - Transportation modes
KW  - Trip purpose
UR  - http://ntl.bts.gov/lib/31000/31000/31021/ICT-09-033.pdf
UR  - https://trid.trb.org/view/892207
ER  - 

TY  - RPRT
AN  - 01131282
AU  - Stone, John R
AU  - Mei, Bing
AU  - Demers, Alixandra
AU  - Paladugu, Bharath
AU  - North Carolina State University, Raleigh
AU  - North Carolina State University, Raleigh
AU  - North Carolina Department of Transportation
AU  - Federal Highway Administration
TI  - NC Truck Network Model Development Research
PY  - 2009/02//Final Report
SP  - 102p
AB  - This research develops a validated prototype truck traffic network model for North Carolina. The model includes all counties and metropolitan areas of North Carolina and major economic areas throughout the U.S. Geographic boundaries. Population and employment define the study areas. The network is based on the National Highway Planning Network and it includes Interstates, US Highways, and secondary roads. The North Carolina network attributes include highway type, speed, and terrain. The base year long haul truck data are based on Federal Highway Administration (FHWA) Freight Analysis Forecasting (FAF) origin-destination data for North Carolina including origins and destinations outside North Carolina. Short haul traffic and back haul truck traffic are generated using simplified trip generations rates and adjustments to the FAF data. Base year 2006 truck traffic estimates for North Carolina are validated by over 450 truck traffic counts throughout the state. Only ADTT (average daily truck traffic) is estimated by the network model, not total vehicle traffic including automobiles. Since the model does not include automobile trips and truck-only traffic is usually far below roadway capacity, the current network model is not built with a capacity-constrained traffic assignment feature. The network is sensitive to input speed but not to traffic volumes on the highway. Consequently any network changes for scenario testing have to be expressed in terms of speed changes to the network links affected.
KW  - Back haul
KW  - Long haul
KW  - Mathematical models
KW  - National Highway Planning Network
KW  - North Carolina
KW  - Origin and destination
KW  - Short haul
KW  - Traffic forecasting
KW  - Truck traffic
UR  - http://www.ncdot.org/doh/preconstruct/tpb/research/download/2006-09FinalReport.pdf
UR  - https://trid.trb.org/view/891104
ER  - 

TY  - RPRT
AN  - 01130737
AU  - LaVassar, Colin J
AU  - Mahoney, Joe  P.
AU  - Willoughby, Kim A
AU  - Washington State Transportation Center
AU  - Washington State Department of Transportation
AU  - Federal Highway Administration
TI  - Statistical Assessment of Quality Assurance-Quality Control Data for Hot Mix Asphalt
PY  - 2009/02//Final Research Report
SP  - 138p
AB  - Recent trends in the paving industry have resulted in increased contractor involvement in the design, acceptance, and performance of hot mix asphalt (HMA) pavements. As a result, questions have arisen about whether contractor process control tests, alternatively known as quality control (QC), should be incorporated into the acceptance and pay factor processes that state highway agencies currently use. To examine this issue, various statistical tests were used including F and t-tests to compare QC data to agency-obtained quality assurance (QA) results. The percentage of projects that exhibited statistically significant differences in mean values and variances was calculated and assessed. For projects that had statistically similar QC and QA results, the average difference between the two testing programs was calculated. The results of the statistical analysis were analyzed from both a statistical and engineering perspective. This report contains data from four state DOTs—California, Minnesota, Texas, and Washington. These states also provided the funding for the study.
KW  - California
KW  - F test
KW  - Hot mix asphalt
KW  - Minnesota
KW  - Quality assurance
KW  - Quality control
KW  - State departments of transportation
KW  - Statistical analysis
KW  - T test
KW  - Texas
KW  - Washington (State)
UR  - http://www.wsdot.wa.gov/research/reports/fullreports/686.1.pdf
UR  - https://trid.trb.org/view/891062
ER  - 

TY  - RPRT
AN  - 01129979
AU  - Quiroga, Cesar
AU  - Kraus, Edgar
AU  - Koncz, Nicholas
AU  - Lyle, Stacey
AU  - Li, Yingfeng
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Right of Way Real Property Asset Management – Prototype Data Architecture
PY  - 2009/02//Technical Report
SP  - 162p
AB  - The Texas Department of Transportation (TxDOT) is responsible for managing 1.1 million acres of land that provide right of way for approximately 80,000 centerline miles of state-maintained roads. Management of the huge right of way asset involves considerable resources and the integration of numerous business processes. There is an urgent need to develop a right of way asset data architecture to facilitate the inventory and management of TxDOT right of way assets. This architecture would facilitate the identification of current right of way boundaries, tracking of right of way boundary changes, automatic mapping of right of way surveying data to other layers of information such as control section job and route number locations, and complete attribution of right of way assets. It would also simplify the production of reports, including those needed to address financial reporting requirements. As part of the research, the researchers evaluated current right of way data practices at TxDOT and other agencies, and developed and tested a prototype geographic information system (GIS)-based right of way asset data model. The data model included a logical model, a physical model, and data dictionary, following current TxDOT data architecture standards and findings from recent research and implementation projects.
KW  - Asset management
KW  - Boundaries (Geography)
KW  - Data architecture
KW  - Data models
KW  - Financial reporting
KW  - Geographic information systems
KW  - Inventory
KW  - Mapping
KW  - Prototypes
KW  - Right of way (Land)
UR  - http://tti.tamu.edu/documents/0-5788-1.pdf
UR  - https://trid.trb.org/view/890633
ER  - 

TY  - RPRT
AN  - 01129896
AU  - Szary, Patrick J
AU  - Maher, Ali
AU  - Center for Advanced Infrastructure and Transportation
AU  - New Jersey Department of Transportation
AU  - Federal Highway Administration
TI  - Implementation of Weigh-in-Motion (WIM) Systems
PY  - 2009/02//Final Report
SP  - 125p
AB  - This research finished the development and implementation of a novel and durable, higher voltage, and lower temperature dependant weigh-in-motion (WIM) sensor that was begun under an earlier research project. These better sensors will require fewer lane closings and replacements than the existing sensors. They will also aid the departments of transportation to better identify those vehicles which use the nation's major highways and do not comply with the current weight restrictions that are placed on larger vehicles. The primary focus of the research was to create a full-scale WIM sensor that is less temperature dependent and more durable than traditional WIM sensors. Traditionally, the data collected from the sensor may be utilized in two ways. The first is by using static vehicle effects on the sensor, which corresponds to the weight of the vehicle; these data can be used for enforcement of the vehicle legal weight limits. The second is by using the dynamic loading of the sensor, which relates to the actual loading that the roadway is experiencing; these data will be useful to engineers who must design the roadway as well as plan for repair schedules. However, there is a growing trend to broaden the use of WIM data and use the data to the fullest extent. Instead of just using WIM data to screen commercial vehicles or for pavement design, there is a new recognition that good data can be useful for bridge structural analysis, safety analysis, traffic control and operations, freight management and operations, facility planning and programming, and standards and policy enforcement as per the recent report “Effective Use of Weigh-in-Motion Data, the Netherlands Case Study” (FHWA October 2007). In lieu of this development, the need for better sensors to provide good data is more important today than ever before.
KW  - Design
KW  - Durability
KW  - Sensors
KW  - Weigh in motion
UR  - http://www.nj.gov/transportation/refdata/research/reports/FHWA-NJ-2009-001.pdf
UR  - https://trid.trb.org/view/890119
ER  - 

TY  - RPRT
AN  - 01129609
AU  - Toth, Charles
AU  - Grejner-Brzezinska, Dorota A
AU  - Ohio State University, Columbus
AU  - Ohio Department of Transportation
AU  - Federal Highway Administration
TI  - Airborne LiDAR Reflective Linear Feature Extraction for Strip Adjustment and Horizontal Accuracy Determination
PY  - 2009/02
SP  - 122p
AB  - Ohio Department of Transportation's (ODOT's) Office of Aerial Engineering (OAE) has been using an Opetch 30/70 ALTM airborne Light Detection and Ranging (LiDAR) system for about four years. The introduction of LiDAR technology was a major development towards improving the mapping operations. The overall experiences are excellent as evidenced by numerous projects where highly accurate surface data were produced in an unprecedentedly short time. As is typically with new technology, OAE has identified areas for improvements in terms of achieving better accuracy and increasing data processing efficiency. In particular, the horizontal accuracy of the LiDAR product required further attention. The objectives of this research were to (1) introduce ground control to LiDAR by using road pavement makings that can be precisely surveyed by ODOT's system; (2) preform a strip adjustment for seamless integration of strips into the final product; (3) improve the horizontal accuracy in order to better characterize the final product; and (4) improve accuracy (both horizontal and vertical) to use ground control that is less labor-intense, requires no or limited surveying and imposes less restrictions in normal field operations. The ultimate objective of this research project was to advance the earlier developed LiDAR-specific ground control-based LiDAR data accuracy improvement technique by including existing natural and man-made objects as targets, in particular using pavement markings, and extending the methodology for handling both types of targets in a highly automated way. Obviously, the total elimination of the deployable targets was the desirable long-term research objective.
KW  - Data accuracy
KW  - Feature extraction
KW  - Laser radar
KW  - Linear features
KW  - Mapping
KW  - Reflectivity
KW  - Road markings
UR  - http://worldcat.org/oclc/318903743/viewonline
UR  - http://ntl.bts.gov/lib/35000/35500/35502/134316-FR.pdf
UR  - https://trid.trb.org/view/889731
ER  - 

TY  - SER
AN  - 01128993
JO  - Civil Engineering Studies, Illinois Center for Transportation Series
PB  - University of Illinois, Urbana-Champaign
AU  - Chapman, Patrick
AU  - Wiczkowski, Piotr
AU  - University of Illinois, Urbana-Champaign
AU  - Illinois Department of Transportation
AU  - Federal Highway Administration
TI  - Wind-Powered Electrical Systems - Highway Rest Areas, Weigh Stations, and Team Section Buildings
PY  - 2009/02//Final Report
IS  - 09-034
SP  - 26p
AB  - This project considered the use of wind for providing electrical power at Illinois Department of Transportation (IDOT) highway rest areas, weigh stations, and team section buildings. The goal of the project was to determine the extent to which wind power could offset electricity costs, provide a reasonable return on investment, offset energy use, and provide educational opportunities. The project gathered and analyzed the natural wind resources available at (or near) these facilities. These data were then used in conjunction with various wind turbines that are currently commercially available. The result of this analysis is an approximation to the wind-based electrical energy potential of a given wind turbine at a given site. Thereafter, the monetary value of this electrical energy was computed and put in context of the cost of the wind turbine and associated overhead. In order to assess economic feasibility, the levelized cost of energy was then compared to current electricity rates for Illinois. This analysis showed that indeed there are some combinations of location and wind turbines that may produce electricity at a competitive rate. One of the most important factors in this analysis is the cost of wind turbines, which is generally unknown (but can be approximated) and depends on many factors. To account for this variability, the authors of this report have provided a spreadsheet containing all the data necessary to rapidly calculate the levelized cost of energy. The user of the spreadsheet need only enter some simple information, such as cost of the turbine and interest rates. The spreadsheet should enable procurement agents to rigorously compare the prices and returns for given locations and turbine manufacturers.
KW  - Cost estimating
KW  - Economic analysis
KW  - Electric power generation
KW  - Illinois Department of Transportation
KW  - Roadside rest areas
KW  - Spreadsheets
KW  - Weigh stations
KW  - Wind power generation
KW  - Wind turbines
UR  - http://ntl.bts.gov/lib/31000/31000/31022/ICT-09-034.pdf
UR  - https://trid.trb.org/view/889138
ER  - 

TY  - SER
AN  - 01128977
JO  - TechBrief
PB  - Federal Highway Administration
TI  - Traffic Calming on Main Roads Through Rural Communities
PY  - 2009/02
SP  - 16p
AB  - Traffic calming has been evaluated and used extensively within low-speed urban areas in the United States but less so in rural areas where driver expectations and traffic characteristics are different. This TechBrief summarizes an evaluation of the effects on speed of low-cost, traffic-calming treatments on main rural highways passing through small, rural communities in Iowa. A brief description and photograph of each treatment is provided, along with a summary of the effects on speed.
KW  - Iowa
KW  - Rural areas
KW  - Rural highways
KW  - Speed control
KW  - Traffic calming
UR  - http://www.fhwa.dot.gov/publications/research/safety/08067/index.cfm
UR  - http://ntl.bts.gov/lib/31000/31200/31215/FHWA-HRT-08-067.pdf
UR  - https://trid.trb.org/view/889152
ER  - 

TY  - RPRT
AN  - 01128404
AU  - Kraus, Edgar
AU  - Dawood, Hussam
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Utility Accommodation and Conflict Tracker (UACT) User Manual
PY  - 2009/02//Technical Report
SP  - 114p
AB  - Project 0-5475 performed a comprehensive analysis of utility conflict data/information flows between utility accommodation stakeholders in the Texas Department of Transportation project development process, developed data models to accommodate work and data flows between such stakeholders, developed a prototype system for the management of utility conflict data, and developed a tool for the visualization and analysis of utility conflicts within the prototype. This report provides a guideline for users of the prototype system called Utility Accommodation and Conflict Tracker (UACT). The report details how users can access UACT, how UACT displays information, and how users can navigate the interface. The report further provides an overview of UACT’s business areas and the actions that are available to users in those business areas. Specifically, the report provides detailed guidance on how to import project data, import utility facility data, add stakeholders to projects, manage UACT users and permissions, upload and convert documents to PDF, create utility conflicts, create a utility agreement assembly, and create reports based on UACT data.
KW  - Computer program documentation
KW  - Conflict management
KW  - Construction projects
KW  - Data flow
KW  - Data management systems
KW  - Data models
KW  - Data needs
KW  - Project development process
KW  - Prototypes
KW  - Public utilities
KW  - Relocation (Facilities)
KW  - Road construction
KW  - Stakeholders
KW  - Underground utility lines
KW  - Utility conflicts
KW  - Visualization
UR  - http://tti.tamu.edu/documents/0-5475-3.pdf
UR  - https://trid.trb.org/view/888957
ER  - 

TY  - RPRT
AN  - 01128403
AU  - Locander, Robert
AU  - Colorado Department of Transportation
AU  - Colorado Department of Transportation
AU  - Federal Highway Administration
TI  - Analysis of Using Reclaimed Ashpalt Pavement (RAP) as a Base Course Material
PY  - 2009/02//Final Report
SP  - 68p
AB  - The Colorado Department of Transportation (CDOT) has used Reclaimed Asphalt Pavement (RAP) as a base on many projects as a reconstruction strategy. CDOT’s specifications allow RAP to be substituted for unbound aggregate base course (ABC). The laboratory tested properties of reclaimed asphalt pavement are similar to CDOT’s aggregate base course specifications. Conclusions are: RAP has pavement design properties similar to aggregate base course; a suggested gradation specification band is presented for RAP; RAP requirements for plasticity index (PI) and liquid limit (LL) may be the same as ABC Class 6, PI not to exceed six and LL not greater than 30; the stiffness strength properties obtained from laboratory testing shows that RAP has stiffness strength above an unbound ABC Class 6; and the permeability of RAP showed a slight increase over an unbound ABC Class 6. The analysis was performed on limited data. It is recommended to do additional RAP testing for R-value and correlate with CDOT standard correlation equations. Cold milling projects would create material stockpiles of 100% RAP. Gradations, densities, and R-value testing could be sampled and tested from this material. Long-term performance has not been addressed. A recommendation is to obtain performance data at five and ten years. This should be compared to an unbound aggregate base material. The comparison is to see if any distresses prematurely appear, if the stiffness strength changes negatively, or if permanent deformations occur.
KW  - Base course (Pavements)
KW  - Laboratory tests
KW  - Liquid limits
KW  - Pavement design
KW  - Permeability
KW  - Plasticity index
KW  - Recycled asphalt pavements
KW  - Specifications
KW  - Stiffness
UR  - http://www.dot.state.co.us/Publications/PDFFiles/rapbase.pdf
UR  - https://trid.trb.org/view/888988
ER  - 

TY  - RPRT
AN  - 01128400
AU  - Kraus, Edgar
AU  - Le, Jerry
AU  - Dawood, Hussam
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Utility Accommodation and Conflict Tracker (UACT) Installation and Configuration Manual
PY  - 2009/02//Technical Report
SP  - 128p
AB  - Project 0-5475 performed a comprehensive analysis of utility conflict data/information flows between utility accommodation stakeholders in the Texas Department of Transportation project development process, developed data models to accommodate work and data flows between such stakeholders, developed a prototype system for the management of utility conflict data, and developed a tool for the visualization and analysis of utility conflicts within the prototype. This report provides a description of the required steps to install and configure the prototype system for the management of utility conflict data called Utility Accommodation and Conflict Tracker, or UACT. The report details the application’s architecture and system requirements, and provides guidance for the installation and configuration of all software components, including the Geographic Information System (GIS) mapping component and Oracle database. The report also details the activities required to populate the Oracle tablespaces after configuration is complete.
KW  - Configuration management
KW  - Conflict management
KW  - Construction projects
KW  - Data flow
KW  - Data management systems
KW  - Data models
KW  - Data needs
KW  - Project development process
KW  - Prototypes
KW  - Public utilities
KW  - Relocation (Facilities)
KW  - Road construction
KW  - Stakeholders
KW  - Underground utility lines
KW  - Utility conflicts
KW  - Visualization
UR  - http://tti.tamu.edu/documents/0-5475-2.pdf
UR  - http://ntl.bts.gov/lib/31000/31100/31139/0-5475-3.pdf
UR  - http://ntl.bts.gov/lib/31000/31100/31141/0-5475-2.pdf
UR  - https://trid.trb.org/view/888956
ER  - 

TY  - RPRT
AN  - 01128392
AU  - Williams, R Christopher
AU  - Iowa State University, Ames
AU  - Missouri Department of Transportation
AU  - Federal Highway Administration
TI  - Early Permeability Test for Asphalt Acceptance
PY  - 2009/02//Final Report
SP  - 124p
AB  - One of the primary assumptions in structural pavement design for conventional pavements is that a flexible (hot mix asphalt) pavement be impermeable. The basis for this design approach is to minimize moisture infiltration and thus maintain adequate support from the underlying unbound materials. In recent years, with the implementation of the Superpave mix design system, hot mix asphalt (HMA) pavements have been produced with coarser gradations than previously with the Marshall mix design method. A non-destructive method, such as permeability testing, also has the potential to partially characterize the HMA quality more timely than destructive methods, and not leave imperfections in a newly constructed pavement. This study identified the nominal maximum aggregate size, the theoretical maximum specific gravity of the mixture (Gmm), and thickness of the pavement or core as statistically important factors influencing permeability and air voids. Three methods of permeability testing were identified as viable: the Kentucky Air Permeameter, the Karol-Warner Permeameter, and the NCAT Permeameter. This report recommends utilizing an NCAT Permeameter for field testing as part of the quality assurance/quality control process.
KW  - Aggregate gradation
KW  - Air voids
KW  - Field tests
KW  - Flexible pavements
KW  - Hot mix asphalt
KW  - Nominal maximum aggregate size
KW  - Nondestructive tests
KW  - Pavement design
KW  - Permeability
KW  - Permeameters
KW  - Quality assurance
KW  - Quality control
KW  - Specific gravity
KW  - Superpave
KW  - Thickness
UR  - http://library.modot.mo.gov/RDT/reports/Ri07053/or09017.pdf
UR  - https://trid.trb.org/view/888985
ER  - 

TY  - RPRT
AN  - 01128374
AU  - Kraus, Edgar
AU  - Quiroga, Cesar
AU  - Koncz, Nicholas
AU  - Dawood, Hussam
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Development of a Utility Conflict Management System
PY  - 2009/02//Technical Report
SP  - 248p
AB  - A critical process for the timely development and delivery of highway construction projects is the early identification and depiction of utility interests that may interfere with proposed highway facilities. The effective management of such utility interests or conflicts involves utility relocation (or design changes), inspection, and documentation. The large number of stakeholders and the magnitude of the process results in an enormous amount of data. Despite substantial data exchange between stakeholders, there are currently no standards for the exchange of utility data/information in the project development process. The research will address this issue by analyzing specific information flows and data needs to determine data models and by developing a prototype utility conflict data management system. More specifically, the research will perform a comprehensive analysis of utility conflict data/information flows between utility accommodation stakeholders in the Texas Department of Transportation project development process, develop data models to accommodate work and data flows between such stakeholders, develop a prototype system for the management of utility conflict data, and develop a tool for the visualization and analysis of utility conflicts within the prototype. This report includes a review of utility relocation and coordination practices, describes the development of data models, and illustrates the development of the prototype conflict management system.
KW  - Conflict management
KW  - Construction projects
KW  - Data flow
KW  - Data management systems
KW  - Data models
KW  - Data needs
KW  - Project development process
KW  - Prototypes
KW  - Public utilities
KW  - Relocation (Facilities)
KW  - Road construction
KW  - Stakeholders
KW  - Underground utility lines
KW  - Utility conflicts
KW  - Visualization
UR  - http://tti.tamu.edu/documents/0-5475-4.pdf
UR  - http://ntl.bts.gov/lib/31000/31100/31137/0-5475-4.pdf
UR  - https://trid.trb.org/view/888856
ER  - 

TY  - SER
AN  - 01127437
JO  - TechBrief
PB  - Federal Highway Administration
TI  - High-Performance Materials for Substructures, Foundations, and Earth Retaining Systems Workshop
PY  - 2009/02
SP  - 12p
AB  - High-performance materials (HPM) are being applied to many areas of highway construction and maintenance. These materials range from engineered concrete and composite materials to specialty steels and recycled materials. Currently, most applications of these materials are in pavements and bridge superstructures. With the constant pressure on our stakeholders to manage the existing highway infrastructure with tighter budgets, higher costs, and continuing environmental concerns, the extended use of HPMs to other elements of the highway system, specifically substructures, foundations, and retaining structures, warrants investigation. To facilitate discussion on this subject, a workshop was held at the Turner-Fairbank Highway Research Center (TFHRC) on August 28–29, 2006. This tech brief is a summary of the workshop proceedings.
KW  - Bridge foundations
KW  - Bridge substructures
KW  - Composite materials
KW  - Earth retaining systems
KW  - High performance concrete
KW  - High performance materials
KW  - High performance steels
KW  - Recycled materials
KW  - Structural steel
KW  - Workshops
UR  - http://www.fhwa.dot.gov/publications/research/infrastructure/bridge/08058/08058.pdf
UR  - https://trid.trb.org/view/887922
ER  - 

TY  - RPRT
AN  - 01127423
AU  - Federal Highway Administration
TI  - Evaluation of Sign and Marking Alternatives for Displaced Left-Turn Lane Intersections
PY  - 2009/02//Summary Report
SP  - 16p
AB  - This document describes research conducted by the Federal Highway Administration (FHWA) to support guidance on the signing and marking of displaced left-turn lane intersections (DLT)--also known as continuous flow intersections (CFI).  The DLT is an at-grade intersection that is intended to support high-traffic flow where there is a large volume of left turns and heavy through volumes.  Its design permits the use of two- or three-phase traffic signals at the junction of two roads, while still providing at-grade protected left-turn movements.
KW  - Continuous flow intersections
KW  - Displaced left turn intersections
KW  - Left turns
KW  - Road markings
KW  - Throughput (Traffic)
KW  - Traffic flow
KW  - Traffic signs
KW  - Traffic volume
UR  - http://www.fhwa.dot.gov/publications/research/safety/08071/index.cfm
UR  - http://ntl.bts.gov/lib/30000/30700/30768/08071.pdf
UR  - https://trid.trb.org/view/887920
ER  - 

TY  - RPRT
AN  - 01127421
AU  - Middleton, Dan
AU  - Charara, Hassan A
AU  - Longmire, Ryan
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Alternative Vehicle Detection Technologies for Traffic Signal Systems: Technical Report
PY  - 2009/02//Technical Report
SP  - 108p
AB  - Due to the well-documented problems associated with inductive loops, most jurisdictions have replaced many intersection loops with video image vehicle detection systems (VIVDS). While VIVDS have overcome some of the problems with loops such as traffic disruption and pavement degradation, they have not been as accurate as originally anticipated. The objective of this project is to conduct evaluations of alternative detector technologies for application into the state’s traffic signal systems. The research will include investigating the available detectors that could replace loops or VIVDS through a literature search and agency contacts, followed by field and/or laboratory investigations of promising technologies. Deliverables will include a research report, a project summary report, and a detector selection guide. Findings indicate that three detectors should be considered as alternatives to VIVDS for signalized intersections – one is a radar detector and the other two are magnetic detectors. The radar detector is only for dilemma zone detection and does not cover the stop line area. The other two are point detectors, so their basic function would be for loop replacements. One is an intrusive detector, requiring a short lane closure for installation and replacement. Field testing of performance for all three detectors indicated they are worth considering as inductive loop or VIVDS replacements.
KW  - Alternatives analysis
KW  - Dilemma zone
KW  - Field tests
KW  - Loop detectors
KW  - Magnetic detectors
KW  - Radar vehicle detectors
KW  - Traffic signal control systems
KW  - Video imaging detectors
UR  - https://trid.trb.org/view/887939
ER  - 

TY  - RPRT
AN  - 01127114
AU  - Vyas, Maria
AU  - Fehr & Peers
AU  - Utah Department of Transportation
AU  - Federal Highway Administration
TI  - Infrasound Avalanche Monitoring System Research Evaluation
PY  - 2009/02
SP  - 62p
AB  - Little Cottonwood Canyon Road (SR-210) has one of the highest risks for avalanche activity for almost any road in North America. Until recently, Utah Department of Transportation (UDOT) staff members have generally relied on visual cues to know whether avalanche control operations have successfully triggered slides (the same holds true for naturally occurring slides). However, in poor lighting or blizzard/whiteout conditions, staff cannot visually monitor whether control operations were successful, or if there is still a risk of avalanche. In 2006, UDOT installed an Infrasonic Avalanche Detection system to monitor three locations in Little Cottonwood Canyon. The Infrasonic provides remote sensing of avalanche activity, so that in poor visibility conditions UDOT staff members are aware of whether an avalanche risk remains or not. The purpose of this research is to evaluate the performance and value of the Infrasonic and determine whether it increases the reliability of avalanche control operations, thereby enhancing public safety.
KW  - Avalanches
KW  - Detection and identification systems
KW  - Infrasound
KW  - Little Cottonwood Canyon (Utah)
KW  - Monitoring
KW  - Remote sensing
UR  - http://tris.trb.org/common/TRIS%20Suite/includes/getfile.aspx?subdir=docs&nodl=1&f=Infrasound%20research%20evaluation%20final%20022409.pdf
UR  - http://utah.ptfs.com/awweb/awarchive?type=file&item=18921
UR  - https://trid.trb.org/view/887773
ER  - 

TY  - RPRT
AN  - 01127016
AU  - Zhang, Yunlong
AU  - Tong, Jiaxin
AU  - Carlson, Paul J
AU  - Hawkins, H Gene
AU  - Keating, Peter B
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Development of Measures to Improve Field Performance of Retroreflective Raised Pavement Markers
PY  - 2009/02//Technical Report
SP  - 204p
AB  - Retroreflective raised pavement markers (RRPMs) are routinely used in Texas to supplement highway pavement markings. In recent years, problems of marker failure such as poor retention on pavements, physical damage, and loss of retroreflectivity are common. All marker models used in Texas meet the requirements set by American Society of Testing and Materials (ASTM) specifications. However, their performance varies significantly. The results from existing testing methods also do not correlate with field performance. It is therefore critical to identify or develop new lab testing methods that can accurately predict marker performance in the field. This report presents the research conducted over the three-year period to develop new lab tests that can predict marker field performance. Four field test decks were installed and monitored. Retroreflectivity and physical condition data were collected on six selected RRPM models at four deck locations that were selected based on traffic condition, pavement surface type, geographic and other environmental factors. Currently recommended ASTM tests, modified ASTM tests, and other new lab tests were conducted. Finite element modeling (FEM) of RRPMs under tire-marker impact and lab setting testing was also conducted. The marker performances from the test decks, under lab tests, and in simulation are compared. Based on the results of comparisons, a new lab test that best correlates with the field performance of the RRPMs is recommended.
KW  - American Society for Testing and Materials
KW  - Durability
KW  - Field performance
KW  - Finite element method
KW  - Laboratory tests
KW  - Performance measurement
KW  - Raised retroreflective road markers
KW  - Raised road markings
KW  - Retroreflectivity
KW  - Simulation
UR  - http://tti.tamu.edu/documents/0-5089-1.pdf
UR  - https://trid.trb.org/view/887716
ER  - 

TY  - RPRT
AN  - 01126879
AU  - Liu, Juanyu
AU  - Mukhopadhyay, Anal Kanti
AU  - Celaya, Manuel
AU  - Nazarian, Soheil
AU  - Zollinger, Dan G
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Best Practices for the Use of Siliceous River Gravel in Concrete Paving
PY  - 2009/02//Technical Report
SP  - 298p
AB  - Fracture toughness (K sub IC) value at early ages of concrete was used to represent the interfacial bond between aggregate and mortar of a variety of coarse aggregates types and concrete mixtures. A fractional factorial design based on Taguchi’s orthogonal array using four factors (i.e., aggregate type, w/cm, replacement of ultra-fine fly ash, and curing method) was selected to conduct the detailed laboratory study. The statistical analysis indicated the following decreasing rank order with respect to the relative importance of each factor to K sub IC: aggregate type, curing method, w/cm, and ultra-fine fly ash content. A comprehensive investigation of aggregate properties relative to physical, geometric, and chemical characteristics was conducted. The research findings indicated that the aggregate-mortar interfacial bond for a given cement paste was found not to be a simple function of any one of the aggregate properties, but a function of all three properties aggregated together. The application of utility theory to the evaluation of overall contribution of aggregate properties to the bonding performance of concrete, and feasibility of design combinations enables agencies to select the best aggregate type, modify aggregates by blending different aggregates, and optimize the design combinations for concrete paving construction, to relieve delamination and further spalling distresses. The interfacial fracture energy can be predicted once a design combination is known based on the linear relation with both concrete and mortar fracture energy. A fracture mechanics based approach was proposed with the facilitation of numerical analysis to predict the occurrence of delamination. The criterion for predicting early age delamination occurrence is that delamination occurs when the stress intensity factor (K sub I) > K sub IC. Through examples of practical design and construction methods, this approach is able to assess the probability of delamination occurrence, which will facilitate selection and evaluation of the effectiveness of pavement design methods to prevent delamination and spalling problems in concrete paving. Test sections of both winter and summer were established based on the research finding from laboratory investigations, theoretical modeling, and numerical analysis. Future performance of these sections will determine if the measures taken to arrest delamination were successful or not.
KW  - Aggregates
KW  - Best practices
KW  - Bond strength (Materials)
KW  - Concrete
KW  - Concrete curing
KW  - Delamination
KW  - Fly ash
KW  - Fracture mechanics
KW  - Fracture properties
KW  - Laboratory tests
KW  - Properties of materials
KW  - Siliceous river gravel
KW  - Spalling
KW  - Stress intensity factor
KW  - Utility theory
KW  - Water cement ratio
UR  - http://tti.tamu.edu/documents/0-4826-1.pdf
UR  - https://trid.trb.org/view/887694
ER  - 

TY  - RPRT
AN  - 01124973
AU  - Kuhn, Beverly T
AU  - Goodin, Ginger D
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Managed Lanes Handbook Training: Year 2 Report of Activities
PY  - 2009/02//Technical Report
SP  - 20p
AB  - This report summarizes the Year 2 activities under Implementation Project 5-4160-01, Managed Lanes Handbook Training. The overall objective of the project is to develop a 12-hour workshop covering "The Managed Lanes Handbook," and teach the materials at seven locations across the state, including two pilot workshops. "The Managed Lanes Handbook" was developed for the Texas Department of Transportation (TxDOT) to help the staff make informed planning, design, and operational decisions when considering managed lanes facilities for its jurisdiction. The handbook presents the critical research results obtained over the five years of the related research project, presented in a usable format, providing a clear, concise, and step-wise approach to planning, designing, operating, and enforcing a managed lanes facility. It also refers the user to other pertinent documents that provide additional detailed information on various aspects of managed lanes. The workshop is designed to facilitate statewide use of the handbook with TxDOT and partnering agency staff involved in managed lanes project development and design. Year 2 activities included teaching the workshops, updating of workshop material as appropriate, and preparing the final deliverables for TxDOT.
KW  - Curricula
KW  - Handbooks
KW  - Managed lanes
KW  - Training
KW  - Workshops
UR  - http://tti.tamu.edu/documents/5-4160-01-2.pdf
UR  - https://trid.trb.org/view/886172
ER  - 

TY  - RPRT
AN  - 01124968
AU  - Fernando, Emmanuel G
AU  - Middleton, Dan
AU  - Carlson, Todd B
AU  - Longmire, Ryan
AU  - Sepulveda, Edward D
AU  - Ruback, Leonard G
AU  - Freeman, Thomas John
AU  - Oh, Jeongho
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Deploying Weigh-in-Motion Installations on Asphalt Concrete Pavements
PY  - 2009/02//Technical Report
SP  - 300p
AB  - The strategic plan for establishing a vehicle weight monitoring net across Texas calls for deploying two technology types – piezoelectric and bending plate systems, and seeks to install weigh-in-motion (WIM) systems in roadways that are under new construction or re-construction. Because the goal is to provide accurate truck weight data for pavement design, the strategic plan prefers deploying WIM installations on 500-ft continuously reinforced concrete pavements. While these pavements have, from experience, provided suitable stable foundations for WIM sensors, building a continuously reinforced concrete pavement is expensive. This project aimed to find less costly but equally viable alternatives for deploying WIM installations by developing guidelines for finding sections within existing asphalt concrete pavements that provide the level of smoothness, pavement support, and projected service life deemed suitable for weigh-in-motion sites, particularly for installations that use piezoelectric technology. Additionally, the project sought to evaluate the use of solar cells to power WIM systems, and wireless alternatives for data communication. These alternatives become particularly relevant in areas where bringing electrical and telephone wires to the site would add significantly to the cost of the WIM installation.
KW  - Asphalt concrete pavements
KW  - Piezoelectric transducers
KW  - Service life
KW  - Smoothness
KW  - Solar cells
KW  - Texas
KW  - Weigh in motion
KW  - Wireless communication systems
UR  - http://tti.tamu.edu/documents/0-5551-1.pdf
UR  - https://trid.trb.org/view/886132
ER  - 

TY  - RPRT
AN  - 01124847
AU  - Sprinkel, Michael M
AU  - Virginia Transportation Research Council
AU  - Virginia Department of Transportation
AU  - Federal Highway Administration
TI  - Condition of Concrete Overlays on Route 60 Over Lynnhaven Inlet After 10 Years
PY  - 2009/02//Final Report
SP  - 26p
AB  - In 1996, 16 high performance concrete overlays were placed on two 28-span bridges on Route 60 over the Lynnhaven Inlet in Virginia Beach, Virginia. Thirteen concrete mixtures included a variety of combinations of silica fume (SF), fly ash, slag, latex, corrosion-inhibiting admixtures, a shrinkage-reducing admixture, and fibers; one overlay was constructed with a thickness of only 0.75 in. (19 mm), and spans were overlaid with and without topical treatments of two corrosion inhibitors. With the exception of one of the overlay systems, the overlays were required to have a minimum thickness of 1.25 in. (32 mm). Another overlay system had a variable thickness ranging from 1.25 to 0.75 in. (32 to 19 mm) to provide good ride quality. The demonstration was designed to show that many different combinations of materials can be used for overlays. The overlays were last evaluated in the fall of 1999 after 3 years in service. The objective of this research was to determine the condition of the overlays at 10 years of age. The results indicated that all overlays have performed well with the exception of most of the areas adjacent to joints. Many of these areas were replaced by the original contractor and replaced again by the City of Virginia Beach. The overlays were ranked with respect to permeability, chloride content, and cost. The 7% SF overlay on the eastbound lane had the lowest permeability, and the 7% SF overlay on the westbound lane had the highest permeability. The overall best performing overlay was the latex-modified concrete (LMC) overlay, which had the second lowest permeability and chloride diffusion constant and the lowest chloride ion content. Overlays containing fibers and the LMC overlay were estimated to have the highest cost, and the 40% slag overlay was estimated to have the lowest cost. Although the overlays performed differently with respect to permeability to chloride ion and chloride intrusion, all of the overlays can provide good skid resistance and protection against intrusion by chloride ions and can be an economical technique for extending the life of hydraulic cement concrete decks. The Virginia Department of Transportation should continue to extend the life of bridge decks using LMC and should consider using overlays containing combinations of SF, fly ash, and slag as evaluated in this study when justified based on the cost-benefit analysis for a project.
KW  - Admixtures
KW  - Benefit cost analysis
KW  - Bridge decks
KW  - Chloride content
KW  - Concrete overlays
KW  - Condition surveys
KW  - Corrosion resistant materials
KW  - Costs
KW  - Fiber reinforced concrete
KW  - Fly ash
KW  - High performance concrete
KW  - Latex modified concrete
KW  - Permeability
KW  - Shrinkage reducing admixtures
KW  - Silica fume
KW  - Skid resistance
KW  - Slag
KW  - Thickness
KW  - Virginia Beach (Virginia)
UR  - http://www.virginiadot.org/vtrc/main/online_reports/pdf/09-r13.pdf
UR  - https://trid.trb.org/view/886074
ER  - 

TY  - RPRT
AN  - 01124743
AU  - Venglar, Steven P
AU  - Porter, Richard J
AU  - Obeng-Boampong, Kwaku O
AU  - Kuchangi, Shamanth P
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Establishing Advisory Speeds on Non Direct-Connect Ramps: Technical Report
PY  - 2009/02//Technical Report
SP  - 92p
AB  - Current procedures for setting ramp advisory speeds in the state of Texas are outlined in the Texas Department of Transportation’s official procedures for establishing speed zones. For ramps, these procedures suggest using exit speed or ramp speed signing where an engineering investigation shows the necessity of advising drivers of the maximum recommended speed on a ramp. Research conducted under this investigation involved speed studies of ramps with a broad range of horizontal and vertical curvatures, frontage road to freeway speed differentials and distances between the ramp and the downstream cross street in order to create a predictive model of ramp speed. Utilizing the degree of curvature (if any) found along the ramp and the distance along the ramp from the freeway exit ramp gore to the downstream intersection along the ramp or frontage road, analysts use the predictive model to identify the expected mean truck speed along the ramp. Based on the difference in speed between the freeway and the mean truck speed expected along the ramp, a ramp advisory speed signing scheme is recommended.
KW  - Advisory speeds
KW  - Frontage roads
KW  - Horizontal curvature
KW  - Intersections
KW  - Off ramps
KW  - On ramps
KW  - Speed control
KW  - Texas
KW  - Vertical curvature
UR  - http://tti.tamu.edu/documents/0-6035-1.pdf
UR  - https://trid.trb.org/view/886036
ER  - 

TY  - RPRT
AN  - 01124739
AU  - Fitzpatrick, Kay
AU  - Brewer, Marcus A
AU  - Obeng-Boampong, Kwaku
AU  - Park, Eun Sug
AU  - Trout, Nada D
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Speeds in School Zones
PY  - 2009/02//Technical Report
SP  - 196p
AB  - School speed zones are frequently requested traffic controls for school areas, based on the common belief that if the transportation agency would only install a reduced speed limit, then drivers would no longer speed through the area. This research project was tasked with reviewing existing practices and developing guidelines regarding the establishment of school zones. Researchers documented existing knowledge on traffic control devices in school zones using a review of previous research that examined effectiveness of devices, a survey of practitioners on signing and marking, a review of state and city school zone guidelines and warrants, and a telephone survey of law enforcement officers. Researchers also collected field data at 24 school zones across Texas and analyzed the data for findings on speed-distance relationships, speed-time relationships, influences of various site characteristics on speeds, and special characteristics of school zones with buffer zones. The findings from these analyses were used in developing suggested guidelines for traffic control devices, including school speed zones, near schools in Texas. The Guidelines are designed to serve as a supplement to the Texas Manual on Uniform Traffic Control Devices and the manual on Procedures for Establishing Speed Zones. They are included in this report as Appendix A. Major topics in the Guidelines include: definitions, school location, school speed zone characteristics, pavement markings, crosswalks, school entrances, and conditions for removing a school speed zone.
KW  - Crosswalks
KW  - Data collection
KW  - Field data
KW  - Guidelines
KW  - Literature reviews
KW  - Road markings
KW  - School zones
KW  - Schools
KW  - Speed zones
KW  - Texas
KW  - Traffic control devices
UR  - http://tti.tamu.edu/documents/0-5470-1.pdf
UR  - https://trid.trb.org/view/886039
ER  - 

TY  - RPRT
AN  - 01124565
AU  - Hawkins, H Gene
AU  - Pike, Adam M
AU  - Azimi, Mehdi
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Evaluation of Traffic Control Devices: Fifth-Year Activities
PY  - 2009/02//Technical Report
SP  - 59p
AB  - This project was established to provide a means of conducting limited scope evaluations of numerous traffic control device issues. During the fifth, and final, year of the project, researchers conducted four activities: improving the interface for the automated process for identifying the start and end of no-passing zones developed during the fourth year, continuing the evaluation of the performance of lead-free yellow thermoplastic pavement markings started at the end of the fourth year, continuing development of the "Work Zone Implementation Handbook," and creating an updated edition of the "Sign Crew Field Book." The last two of these activities produced stand-alone documents for Texas Department of Transportation (TxDOT) use. The evaluation of lead-free thermoplastic found that the material performs well in most, but not all, areas. The improved interface for the automated no-passing zone was tested in the field at two sites, and the results indicate that the results are consistent with existing no-passing zone markings when considered for vertical alignment only.
KW  - Handbooks
KW  - No passing zones
KW  - Road markings
KW  - Sign Crew Field Book
KW  - Thermoplastic materials
KW  - Traffic control devices
KW  - Work zone traffic control
UR  - http://tti.tamu.edu/documents/0-4701-5.pdf
UR  - https://trid.trb.org/view/885839
ER  - 

TY  - RPRT
AN  - 01124561
AU  - Earsom, Stephen
AU  - Poe, Carson D
AU  - Federal Highway Administration
AU  - Volpe National Transportation Systems Center
TI  - Carbon Sequestration Pilot Program: Implementation and Next Steps
PY  - 2009/02//Progress Report
SP  - 21p
AB  - This report documents the elements likely required to implement a carbon sequestration process tailored to state Departments of Transportation (DOTs). Findings are based on the challenges, key lessons, and preliminary results from New Mexico DOT’s initial five months of implementing the Federal Highway Administration’s (FHWA's) Carbon Sequestration Pilot Program (CSPP). Although communication of the progress and outcomes should continue through the life-cycle of the pilot program, it is expected that the body of knowledge formed from NMDOT’s early experience can help other state DOTs evaluate the viability of carbon sequestration practices in lands they control. The CSPP is also considered a demonstration project. As such, this report offers preliminary recommendations and considerations that can assist FHWA and other federal agencies in making well-informed decisions related to carbon sequestration in the highway right of way during discussions surrounding the reauthorization of the nation’s next transportation bill. Since the NMDOT effort is ground-breaking nationally, and perhaps globally, it is expected that NMDOT’s experience can provide insights useful in determining whether efforts to accomplish a similar program at a broader scale are practical.
KW  - Air quality management
KW  - Biological control
KW  - Carbon dioxide
KW  - Carbon sequestration
KW  - Carbon Sequestration Pilot Program
KW  - Decision making
KW  - Demonstration projects
KW  - Exhaust gases
KW  - Implementation
KW  - New Mexico Department of Transportation
KW  - Right of way (Land)
UR  - http://climate.dot.gov/documents/FINAL_C-Seq_Report_021109.pdf
UR  - http://ntl.bts.gov/lib/33000/33500/33592/FINAL_C-Seq_Report_021109.pdf
UR  - https://trid.trb.org/view/885823
ER  - 

TY  - RPRT
AN  - 01124560
AU  - Papagiannakis, A Thomas
AU  - Gharaibeh, Nasir G
AU  - Weissmann, Jose
AU  - Wimsatt, Andrew J
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Pavement Scores Synthesis
PY  - 2009/02//Technical Report
SP  - 152p
AB  - The purpose of this synthesis was to summarize the use of pavement scores by the states, including the rating methods used, the score scales, and descriptions; if the scores are used for recommending pavement maintenance and rehabilitation actions; how the scores are computed; the distresses that are used for generating the scores; the sampling method; the survey frequency; and each state agency’s legislative or internal goal. The distresses considered and the way they are summarized into indices varies between states. Typically, the extent and severity is used for computing scores. In rating distresses, some agencies use the most dominant distress present, while others use all the distresses present. For each distress type/severity level, criteria are established in terms of the distress index that indicates the need for rehabilitation. In addition, how the data analysis results are used varies from state to state. According to the information collected for this synthesis, only three states indicated that they have goals set by, or reported to, their respective legislatures. Internal agency goals vary from state to state as well. Since the scores are computed differently for each state, and since the sampling methods vary from state to state, the definition of good or better varies significantly between each state; therefore, direct comparisons between scores or percent lane miles in good or better condition between states are not valid.
KW  - Pavement distress
KW  - Pavement management systems
KW  - Pavement performance
KW  - Pavements
KW  - Ratings
KW  - Sampling strategies
KW  - Scores
UR  - http://tti.tamu.edu/documents/0-6386-1.pdf
UR  - https://trid.trb.org/view/885843
ER  - 

TY  - RPRT
AN  - 01124332
AU  - Glover, Charles J
AU  - Martin, Amy Epps
AU  - Chowdhury, Arif
AU  - Han, Rongbin
AU  - Prapaitrakul, Nikornpon
AU  - Jin, Xin
AU  - Lawrence, James
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Evaluation of Binder Aging and Its Influence in Aging of Hot Mix Asphalt Concrete: Literature Review and Experimental Design
PY  - 2009/02//Technical Report
SP  - 68p
AB  - Binder oxidation in pavements and its impact on pavement performance has been addressed by numerous laboratory studies of binder oxidation chemistry, reaction kinetics, and hardening and its impact on mixture fatigue. Studies also have included some work on binder oxidation and hardening in pavements and the effectiveness of maintenance treatments. Yet more such studies are needed to better understand the fundamentals of pavement performance as a function of climate and pavement parameters. Based on these reports in the literature, an experimental design has been developed to meet three objectives and to provide four products. The objectives are: 1) to develop and calibrate a laboratory test to assess binder aging during the production process and during the field service of the pavement; 2) to incorporate aging for use in a HMA mix design system to produce mixtures that provide adequate resistance to fatigue cracking, including guidelines to optimize resistance of HMA to aging; and 3) to evaluate the use of maintenance treatments to reduce the aging of asphalt pavements starting at early ages. The products: 1) a new test procedure to characterize binder aging, and predict service life for different applications; 2) an HMA mix design component that incorporates aging and its effect on resistance to fatigue cracking; 3) guidelines for optimizing HMA mixture resistance to aging; and 4) guidelines for the best maintenance treatments to reduce the aging of binders. The experimental design includes measurements of binder oxidation and hardening at various stages of binder service, fundamental studies of binder oxidation and hardening kinetics, developing a transport model of binder oxidation in pavements, measurements of field oxidation and hardening rates, measurements of mixture fatigue decline as a function of binder oxidative hardening in both the field and laboratory, and measurements of maintenance treatment effectiveness at retarding binder oxidative hardening.
KW  - Aging (Materials)
KW  - Asphalt concrete
KW  - Asphalt hardening
KW  - Asphalt pavements
KW  - Binders
KW  - Hot mix asphalt
KW  - Laboratory tests
KW  - Literature reviews
KW  - Mix design
KW  - Oxidation
KW  - Pavement maintenance
UR  - http://tti.tamu.edu/documents/0-6009-1.pdf
UR  - https://trid.trb.org/view/885778
ER  - 

TY  - RPRT
AN  - 01124325
AU  - Potts, Ingrid B
AU  - Hutton, Jessica M
AU  - Harwood, Douglas W
AU  - Midwest Research Institute
AU  - Federal Highway Administration
TI  - Strategic Intersection Safety Program Guide
PY  - 2009/02
SP  - 44p
AB  - The Strategic Intersection Safety Program Guide is a tool to assist agencies at the State and local levels in developing strategic, systematic approaches for planning, developing, implementing, and maintaining an intersection safety program.  It provides insights for how a strategic process for improving intersection safety can influence the selection of future projects that have measurable safety outcomes, such as reduction of specific crash types that help achieve strategic goals.  This guide provides a step by step process for a strategic intersection safety program, including steps for the development of specific intersection safety action plans.  It can assist in the development of the intersection-related portions of a State Strategic Highway Safety Plan (SHSP) and assist local agencies in aligning their intersection safety programs with the SHSP intersection safety goals.  A summary is included of the intersection-related goals and improvement strategies incorporated by States in their current SHSPs as a resource for local agencies creating their own intersection safety program and for State agencies updating their SHSPs or developing an intersection safety program.
KW  - Guidelines
KW  - Highway safety
KW  - Intersections
KW  - Local government agencies
KW  - Safety programs
KW  - State government agencies
KW  - Strategic Highway Safety Plan
KW  - Strategic planning
UR  - http://www.worldcat.org/title/strategic-intersection-safety-program-guide/oclc/319891901
UR  - https://trid.trb.org/view/885698
ER  - 

TY  - RPRT
AN  - 01124310
AU  - Shi, Xianming
AU  - Fay, Laura
AU  - Gallaway, Chase
AU  - Volkening, Kevin
AU  - Peterson, Marijean M
AU  - Pan, Tongyan
AU  - Creighton, Andrew
AU  - Lawlor, Collins
AU  - Mumma, Stephanie
AU  - Liu, Yajun
AU  - Nguyen, Tuan Anh
AU  - Western Transportation Institute
AU  - Colorado Department of Transportation
AU  - Federal Highway Administration
TI  - Evaluation of Alternate Anti-Icing and Deicing Compounds Using Sodium Chloride and Magnesium Chloride as Baseline Deicers – Phase I
PY  - 2009/02//Final Report
SP  - 294p
AB  - This project aimed to evaluate potassium acetate, sodium acetate/formate-blend deicers, and potassium formate as alternative anti-icing and deicing compounds relative to sodium chloride (NaCl), salt-sand mixtures, and magnesium chloride (MgCl2) currently used by the Colorao Department of Transportation (CDOT). Based on the literature review, deicers may pose detrimental effects to portland cement concrete infrastructure and asphalt pavement, cause corrosion damage to the transportation infrastructure, or have significant impacts on the environment. The authors conducted laboratory tests to evaluate the performance of several alternative deicers compared with traditional chloride-based deicers, including: SHRP ice melting, penetration and undercutting tests, differential scanning calorimetry tests, and tribometer tests. The negative effects of deicers on metals and concrete were investigated both in the laboratory and in the field. It was estimated that even for high-quality concrete, the implications of chloride-based deicers on the service life of steel-reinforced concrete might be significant. At the three field locations, water samples were collected periodically and the data showed no immediate impact from chloride-based deicers following application adjacent to waterways. The authors described a deicer composite index that would allow winter maintenance managers to numerically evaluate deicers based on their agency priorities or local needs and constraints.
KW  - Anti-icing
KW  - Deicing chemicals
KW  - Field tests
KW  - Laboratory tests
KW  - Literature reviews
KW  - Magnesium chloride
KW  - Potassium acetate
KW  - Potassium formate
KW  - Reinforced concrete
KW  - Service life
KW  - Sodium acetate
KW  - Sodium chloride
KW  - Sodium formate
KW  - Water quality
KW  - Waterways
KW  - Winter maintenance
UR  - http://www.coloradodot.info/programs/research/pdfs/2009/antiicing.pdf
UR  - https://trid.trb.org/view/885627
ER  - 

TY  - RPRT
AN  - 01124301
AU  - Alavi, Sirous
AU  - Tavares, Michael P
AU  - Sierra Transportation Engineers, Incorporated
AU  - Montana Department of Transportation
AU  - Federal Highway Administration
TI  - Highway Project Cost Estimating and Management
PY  - 2009/02//Final Report
SP  - 162p
AB  - This report provides detailed information about the project objectives, deliverables, and findings. The project team thoroughly reviewed the Montana Department of Transportation (MDT) structure, operations, and current procedures as related to MDT highway projects cost estimation practices. This was achieved through a series of visits and a comprehensive set of interviews of MDT staff involved with highway project cost estimation. A literature review of the state-of-practice cost estimating procedures was also conducted and compared with MDT practices. This report contains the project team recommendations along with a series of strategic procedures to implement those recommendations. The report also provides a timeframe for the implementation of recommendations and strategic procedures.
KW  - Cost estimating
KW  - Highway projects
KW  - Implementation
KW  - Interviewing
KW  - Literature reviews
KW  - Montana
KW  - Montana Department of Transportation
KW  - Project management
KW  - Recommendations
KW  - State of the practice
UR  - http://www.mdt.mt.gov/other/research/external/docs/research_proj/project_cost/final_report.pdf
UR  - http://www.mdt.mt.gov/research/projects/const/project_cost.shtml
UR  - https://trid.trb.org/view/885624
ER  - 

TY  - RPRT
AN  - 01124299
AU  - Johnson, Brad
AU  - Beardsley, Mark
AU  - Doran, Jessica
AU  - Colorado State University, Fort Collins
AU  - Colorado Department of Transportation
AU  - Federal Highway Administration
TI  - Functional Assessment of Colorado Wetlands (FACWet) Method – User Manual Version 1.0
PY  - 2009/02//Final Report
SP  - 94p
AB  - The Functional Assessment of Colorado Wetlands (FACWet) Method is a stressor-based, rapid assessment method developed to address key aspects of the Colorado Department of Transportation's (CDOT’s) Clean Water Act permitting needs. FACWet is a collaborative effort involving the Colorado Department of Transportation, Colorado State University, EcoMetrics, LLC, the U.S. Army Corps of Engineers, and the U.S. Environmental Protection Agency. This new mode of wetland assessment is designed to address the regulatory community’s need for functional assessment in administration of the Clean Water Act in Colorado, including pre-project assessment, mitigation planning, and post-project evaluation This document includes the user guide and data sheets for Version 1.0 of the FACWet. This is the current working version of the methodology, but FACWet development is ongoing and the method will be iteratively updated and revised. Updates will be posted on the FACWet website: http://rydberg.biology.colostate.edu/FACWet/. FACWet should be used during the planning stage of projects that may impact wetlands or riparian habitats. Application of the FACWet Method may be required by federal regulatory agencies as part of the Clean Water Act permitting process. It is recommended that staff involved in environmental permitting attend a training course.
KW  - Clean Water Act
KW  - Colorado
KW  - Environmental permits
KW  - Evaluation and assessment
KW  - Habitat (Ecology)
KW  - Manuals
KW  - Methodology
KW  - Wetlands
UR  - http://www.dot.state.co.us/Publications/PDFFiles/facwet.pdf
UR  - https://trid.trb.org/view/885634
ER  - 

TY  - RPRT
AN  - 01124298
AU  - Goswami, Arkopal K
AU  - Miller, John S
AU  - Hoel, Lester A
AU  - Virginia Transportation Research Council
AU  - Virginia Department of Transportation
AU  - Federal Highway Administration
TI  - Airport Offsite Passenger Service Facilities: An Option for Improving Landside Access: Volume II: Access Characteristics and Travel Demand
PY  - 2009/02//Final Report
SP  - 62p
AB  - Offsite airport facilities provide ground transportation, baggage and passenger check in, and other transportation services to departing air passengers from a remote location. The purpose of this study was to develop models to determine the airports that might be candidates for such a facility and estimate the percentage of travelers that would choose to use one to access the airport. Offsite airport facility operations were examined in New York, Los Angeles, Zurich, London, and Hong Kong, and passenger data were obtained from surveys distributed at six U.S. airports. A total of 1,700 air-traveler questionnaires were completed at four airports without offsite facilities, i.e., Baltimore/Washington International Thurgood Marshall Airport (BWI), Charlottesville-Albemarle Airport (CHO), Norfolk International Airport (ORF), and Richmond International Airport (RIC), and at two airports with offsite facilities that provide ground transportation only, i.e., Boston Logan International Airport (BOS) and San Francisco International Airport (SFO). The survey results show that 68% of passengers who traveled directly to the airport terminal would consider using an offsite airport facility if available. Of the passengers who currently use an offsite airport facility that provides only ground transportation, almost 70% indicated that their access would be improved by expanded services including baggage and passenger check in. The two main reasons cited for using the offsite airport facilities surveyed in this study were reduced travel time variability (43%) and lower cost (39%). With the data collected at the six airports, two models were developed sequentially to determine the demand for offsite facilities. The airport access quality model was used to establish initial demand by assuming that the likelihood of a viable offsite facility is directly proportional to the difficulty, or resistance, encountered during the current access trip to the airport. This model yielded expected results when tested with a former offsite airport facility. The offsite facility usage model was used to determine the probability of passengers using an offsite facility while accessing an airport and accurately estimated 58% of the test set responses. The airport access quality model develops a value for total resistance and ranks the airports according to the current difficulty encountered by passengers during their access trip to the airport. When applied to three Virginia airports, passengers accessing RIC had the largest total resistance. Accordingly, RIC is considered to have the highest potential demand for an offsite facility. The offsite airport facility usage model was based on flight departure time and variability in ground travel time as predictors of the final demand. For example, the model estimated an offsite airport facility demand of 74% for passengers departing between 8 and 10:30 A.M. when ground travel times vary by 45 min (rounded to the nearest 15-min interval). For passengers departing before 8:00 A.M. and with a ground travel time that varies by no more than 5 min, the models estimated demand at only 26%. The offsite airport facility usage model was also used to identify the zones (defined by zip codes) where potential use of offsite terminals is substantial.
KW  - Airport access
KW  - Airport operations
KW  - Baggage handling
KW  - Costs
KW  - Demand
KW  - Landside operations (Airports)
KW  - Passenger service
KW  - Questionnaires
KW  - Satellite terminals (Airports)
KW  - Surveys
KW  - Travel time
UR  - http://www.virginiadot.org/vtrc/main/online_reports/pdf/09-r6.pdf
UR  - http://ntl.bts.gov/lib/37000/37700/37729/09-r6.pdf
UR  - https://trid.trb.org/view/885609
ER  - 

TY  - RPRT
AN  - 01124211
AU  - Strathman, James G
AU  - Bronfman, Lois Martin
AU  - Dong, Hongwei
AU  - Portland State University
AU  - Oregon Department of Transportation
AU  - Federal Highway Administration
AU  - Oregon Transportation Research and Education Consortium
TI  - Evaluation of the Oregon DMV Medically At-Risk Driver Program
PY  - 2009/02//Final Report
SP  - 136p
AB  - Oregon is one of six states with requirements for mandatory reporting of drivers with medical impairments. In 2003, the state’s mandatory reporting program, administered by the Oregon Driver and Motor Vehicle (DMV) Services, was revised to cover an extensive range of cognitive and functional impairments. This report examines the safety risk of persons treated in Oregon’s revised Medically At-Risk Driver program. The incidence of crashes and traffic offense convictions before and after license suspension is documented and compared to crash and conviction incidence of persons treated in the DMV’s voluntary medical reporting program. Comparisons are also made to a representative sample of the state’s driver population. Structured interviews of program stakeholders were also undertaken to identify issues related to the program’s performance. The safety analysis and interview findings provided a basis for recommendations made in the report.
KW  - Crashes
KW  - Diseases and medical conditions
KW  - Driver licenses
KW  - Drivers
KW  - Impaired drivers
KW  - Oregon
KW  - Reporting medical impairment
KW  - Reporting requirements
KW  - Traffic conviction
UR  - http://www.otrec.us/project/80
UR  - https://trid.trb.org/view/885569
ER  - 

TY  - RPRT
AN  - 01123009
AU  - Molino, John A
AU  - Wachtel, Jerry
AU  - Farbry, John E
AU  - Hermosillo, Megan B
AU  - Granda, Thomas M
AU  - Federal Highway Administration
AU  - Federal Highway Administration
TI  - The Effects of Commercial Electronic Variable Message Signs (CEVMS) on Driver Attention and Distraction: An Update
PY  - 2009/02//Final Report, Phase I
SP  - 96p
AB  - The present report reviews research concerning the possible effects of Commercial Electronic Variable Message Signs (CEVMS) used for outdoor advertising on driver safety. Such CEVMS displays are alternatively known as Electronic Billboards (EBB) and Digital Billboards (DBB). The report consists of an update of earlier published work, a review of applicable research methods and techniques, recommendations for future research, and an extensive bibliography. The literature review update covers recent post-hoc crash studies, field investigations, laboratory investigations, previous literature reviews, and reviews of practice. The present report also examines the key factors or independent variables that might affect a driver’s response to CEVMS, as well as the key measures or dependent variables which may serve as indicators of driver safety, especially those that might reflect attention or distraction. These key factors and measures were selected, combined, and integrated into a set of alternative research strategies. Based on these strategies, as well as on the review of the literature, a proposed three stage program of research has been developed to address the problem. The present report also addresses CEVMS programmatic and research study approaches. In terms of an initial research study, three candidate methodologies are discussed and compared. These are: (1) an on-road instrumented vehicle study, (2) a naturalistic driving study, and (3) an unobtrusive observation study. An analysis of the relative advantages and disadvantages of each study approach indicated that the on-road instrumented vehicle approach was the best choice for answering the research question at the first stage.
KW  - Attention
KW  - Distraction
KW  - Future research
KW  - Highway safety
KW  - Instrumented vehicles
KW  - Literature reviews
KW  - Methodology
KW  - Research
KW  - Roadside advertising
KW  - Variable message signs
UR  - http://www.fhwa.dot.gov/realestate/cevms.htm
UR  - http://www.fhwa.dot.gov/realestate/cevms.pdf
UR  - https://trid.trb.org/view/884747
ER  - 

TY  - ABST
AN  - 01461763
TI  - Support to the Nonmotorized Pilot Program
AB  - This Interagency Agreement (IAA) allows the Volpe Center to continue related support begun under Project Plan Agreement HW3C last amended on July 27, 2007. HW3C initiated Volpe support to the Nonmotorized Transportation Pilot Program (NTPP), including for program management and technical support to FHWA, funded directly by FHWA and for support to the pilot communities for project level evaluation. There are four communities (Columbia, Missouri; Sheboygan County, Wisconsin; Marin County, California and Minneapolis, Minnesota) that are authorized $100 million by the NTPP to construct transportation infrastructure facilities, including sidewalks, bicycle lanes and trails that connect to transit stations, schools, residences, businesses, recreation areas and other activity centers. Under this IAA, the Volpe Center will continue working with the FHWA and the pilot communities to develop and implement a comprehensive technical approach to evaluate the results of investments made in the pilot communities and the overall results of the program as required to meet the Congressional reporting requirements. Although the Volpe Center will be responsible for specific technical tasks and deliverables, it will also provide flexible support to assist the FHWA in administering the program and to work collaboratively with the communities to develop and implement an evaluation process for this new and high profile national program. The Volpe Center will serve as a   technical advisor to and member of the working group composed of staff leads from the four communities, the FHWA, the Rails to Trails Conservancy, the U.S. Centers for Disease Control and other organizations involved with the program.
KW  - Bicycle lanes
KW  - Bicycling
KW  - Bikeways
KW  - Nonmotorized transportation
KW  - Pedestrian areas
KW  - Pedestrians
KW  - Pilot programs
KW  - Project management
KW  - Research projects
KW  - Technical assistance
KW  - Walkways
UR  - https://trid.trb.org/view/1229983
ER  - 

TY  - ABST
AN  - 01464464
TI  - Roadside Safety Analysis Program (RSAP) Update
AB  - Roadside Safety Analysis Program (RSAP) was developed under NCHRP Project 22-9, "Improved Methods for the Cost-Effectiveness Evaluation of Roadside Safety Feature," to update and enhance the cost-effectiveness analysis algorithms and procedures of the ROADSIDE software included in the Roadside Design Guide (RDG). Subsequently, under NCHRP Project 22-9(2), RSAP was revised and Appendix A was included in the 2002 edition of the AASHTO Roadside Design Guide. Since the release of RSAP, users have identified some bugs and problems with the program in field applications. Efforts to fix these program bugs and problems resulted in numerous revisions and "patches" to the program over the years. In addition, a number of needed enhancements have been identified that would improve the operation and functionality of the program under current PC operating systems. Another area of concern is the appropriateness and consistency of the default relationships and data tables embedded in the program. Recent research has improved insights on the relationships about the probability of roadside encroachments, the severity of crashes, and nature of roadside features. The NCHRP projects that led to the development of RSAP did not have the resources to update the relationships and data, so the best available were used. For example, the severity indices tables are believed to need a critical review and updating based upon the results of thousands of RSAP runs made under NCHRP Project 22-12(2), which is aiming to provide guidelines for cost-effective deployment of barriers. Other, more mundane default items, such as costs and lists of basic user-selectable elements in the program, may also warrant updating. This effort is expected to make appropriate updates to the RSAP documentation to allow an updated version to be included in the next version of the Roadside Design Guide. The objectives of this project are to rewrite the software and update the embedded default data tables (e.g., severity indices) of the RSAP. To accomplish the project objective the following tasks are recommended: (1) conduct a literature review for updating the algorithms, procedures and built-in data of the RSAP program, including the severity indices; (2) rewrite the software; (3) update the severity indices; (4) conduct beta testing of the program and make revisions; and (5) submit the final report and software.</font></span></div>
KW  - Algorithms
KW  - Cost effectiveness
KW  - Guidelines
KW  - Highway design
KW  - Roadside
KW  - Roadside Safety Analysis Program
KW  - Traffic safety
UR  - http://www.trb.org/TRBNet/ProjectDisplay.asp?ProjectID=2517
UR  - https://trid.trb.org/view/1232694
ER  - 

TY  - RPRT
AN  - 01131252
AU  - Fisher, Donald L
AU  - Knodler, Michael
AU  - Muttart, Jeffrey W
AU  - University of Massachusetts, Amherst
AU  - New England Transportation Consortium
AU  - Federal Highway Administration
TI  - Driver-Eye-Movement-Based Investigation for Improving Work-Zone Safety
PY  - 2009/01/28/Final Report
SP  - 61p
AB  - Crashes continue to be a problem in work zones. Analyses have indicated that rear-end and sideswipe crashes are the most frequent. Investigators have hypothesized that distractions are often the cause of both types of crashes. These distractions will only increase as more and more drivers attend to other tasks, such as cell phone conversations. Three experiments were run to determine whether cell phone use in work zones increased drivers’ inattention to the forward roadway. In Experiment 1, drivers were asked to navigate a virtual roadway on a driving simulator which contained a number of work zones. In Experiment 2, drivers were asked to navigate a test track in a real car which contained an actual work zone. And in Experiment 3, drivers were again asked to navigate a virtual roadway with signs warning drivers not to use their cell phones in the work zone. In all experiments, the drivers were asked to engage in a mock cell phone conversation for some portion of the trials. And in all experiments, the drivers’ eyes were tracked. Cell phones clearly decreased drivers’ ability to respond to events around them as determined both by vehicle and eye behavior. And warning signs were effective at increasing drivers’ attention to the roadway.
KW  - Attention
KW  - Cellular telephones
KW  - Countermeasures
KW  - Distraction
KW  - Drivers
KW  - Eye movements
KW  - Utilization
KW  - Warning signs
KW  - Work zone safety
UR  - http://www.uvm.edu/~transctr/pdf/netc/netcr71_04-2.pdf
UR  - https://trid.trb.org/view/890791
ER  - 

TY  - ABST
AN  - 01464290
TI  - AASHTO Workshop to Develop Integrated Policy Approaches to Slow VMT Growth and to Increase Transportation System Efficiency
AB  - <div>This project will be executed via Project 8-36, Task 94.</div>
KW  - Integrated systems
KW  - Policy making
KW  - Transportation efficiency
KW  - Transportation system management
KW  - Vehicle miles of travel
UR  - http://www.trb.org/TRBNet/ProjectDisplay.asp?ProjectID=2620
UR  - https://trid.trb.org/view/1232519
ER  - 

TY  - ABST
AN  - 01462236
TI  - Evaluation of Low-Cost Safety Improvements Pooled Fund Study, Phase IV
AB  - The objectives of this research project are to develop and conduct driving simulations to evaluate safety strategies for: 1) enhanced shoulder or in-lane delineation and marking for sharp curves; 2) enhanced delineation along the curve; 3) advanced warning of unexpected changes in horizontal alignment; 4) dynamic curve warning system; and 5) traffic calming at small-town intersections.
KW  - Driving simulators
KW  - Highway curves
KW  - Intersections
KW  - Low cost
KW  - Research projects
KW  - Safety improvement
KW  - Safety improvement projects
KW  - Small towns
KW  - Traffic calming
KW  - Traffic safety
KW  - Warning devices
UR  - https://trid.trb.org/view/1230457
ER  - 

TY  - ABST
AN  - 01462235
TI  - Evaluation of the Safety Edge Pooled Fund Study
AB  - Evaluate the effectiveness of using the Safety Edge (a filleted rather than vertical edge of pavement) to help prevent and reduce the severity of pavement edge drop-off related crashes.
KW  - Edge detection
KW  - Ran off road crashes
KW  - Research projects
KW  - Roadway edge
KW  - Safety edge (Pavement safety feature)
KW  - Traffic crashes
KW  - Traffic safety
UR  - https://trid.trb.org/view/1230456
ER  - 

TY  - ABST
AN  - 01462231
TI  - DYNASMART-P: Improve Interfaces with Planning Models
AB  - The purpose of this project is to improve the input and output interfaces in DYNASMART-P so that DYNASMART-P can easily interface with general demand models used in the planning process.
KW  - DYNASMART-P (Computer program)
KW  - Research projects
KW  - Traffic control devices
KW  - Traffic simulation
KW  - Transportation planning
UR  - https://trid.trb.org/view/1230452
ER  - 

TY  - ABST
AN  - 01462226
TI  - Adaptive Control System (ACS) Lite--Phase II
AB  - This project will develop enhancements to the Graphical User Interface (GUI) and improve the adaptive control logic.
KW  - Adaptive control
KW  - Autonomous intelligent cruise control
KW  - Graphical user interfaces
KW  - Highway operations
KW  - Research projects
KW  - Traffic control devices
UR  - https://trid.trb.org/view/1230447
ER  - 

TY  - ABST
AN  - 01462225
TI  - Clear Roads Pooled Fund Study
AB  - This research project will rigorously test winter maintenance materials, equipment, and methods for use by highway maintenance crews. Current projects underway include: National Winter Safety Campaign.Computer based training modules for the Anti-Icing/RWIS CBT package.Development of Standardized Test Procedures for Carbide and Deicing Chemicals. National Winter Maintenance Peer Exchange.
KW  - Deicing
KW  - Deicing chemicals
KW  - Research projects
KW  - Road weather information systems
KW  - Snow and ice control
KW  - Winter maintenance
UR  - https://trid.trb.org/view/1230446
ER  - 

TY  - ABST
AN  - 01462224
TI  - High Plains ITS Coalition
AB  - The purpose of the coalition is to gather and share information that will help agency personnel in each state make operational decisions-based conditions and actions taking place in the surrounding state. Under this project, a Web-based system will be built that disseminates information about those conditions and actions on the highway system.
KW  - Coalitions
KW  - Highway operations
KW  - Information dissemination
KW  - Information technology
KW  - Intelligent transportation systems
KW  - Research projects
UR  - https://trid.trb.org/view/1230445
ER  - 

TY  - ABST
AN  - 01462222
TI  - Report to Congress on Pavement Marking Demonstration Project--Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users Section 1907
AB  - This research project will evaluate the durability and cost effectiveness of alternative pavement marking materials, the impact of wider edge lines on driver performance/safety, and the environmental impact of alternative pavement marking materials. Submit the report to the U.S. Congress by June 2009; and conduct additional field data collection and analysis through 2010.
KW  - Cost effectiveness
KW  - Data collection
KW  - Driver performance
KW  - Durability
KW  - Highway safety
KW  - Research projects
KW  - Road markings
UR  - https://trid.trb.org/view/1230443
ER  - 

TY  - ABST
AN  - 01485466
TI  - Autonomous Driving System Development
AB  - This project will develop methodologies for determining when autonomous driving is not safe due to environment, traffic, or in-vehicle conditions and inform drivers accordingly. This project is part of the FHWA Exploratory Advanced Research (EAR) Program.
KW  - Autonomous intelligent cruise control
KW  - Autonomous vehicle guidance
KW  - Driver information systems
KW  - In vehicle sensors
KW  - Methodology
KW  - Research projects
KW  - Traffic safety
UR  - https://trid.trb.org/view/1254184
ER  - 

TY  - ABST
AN  - 01462257
TI  - Asphalt Mixtures with Improved Oxidative Aging Resistance
AB  - The objective of this research project is to develop methods for tracking the oxidation of asphalt binders by measuring changes in aromaticity, elemental composition, and carbonyl content and link these changes to physical changes in the mix. Data will be used to develop methods for retarding the oxidation process.
KW  - Aging (Materials)
KW  - Asphalt mixtures
KW  - Binders
KW  - Mix design
KW  - Oxidation
KW  - Pavement performance
KW  - Research projects
KW  - Resistance (Mechanics)
KW  - Retarders (Chemistry)
UR  - https://trid.trb.org/view/1230478
ER  - 

TY  - ABST
AN  - 01462256
TI  - Procedure for Identifying Aggregate/Concrete Mix Potential to Form Alkali-Silica Reaction Gels
AB  - The objective of this research project is to develop accurate, rapid tests using spectroscopic techniques to identify aggregate components responsible for inducing alkali-silica reaction formation.
KW  - Admixtures
KW  - Aggregates
KW  - Alkali aggregate reactions
KW  - Alkali silica reactions
KW  - Concrete
KW  - Mix design
KW  - Research projects
KW  - Spectroscopic analysis
UR  - https://trid.trb.org/view/1230477
ER  - 

TY  - ABST
AN  - 01462255
TI  - Increased Use of Fly Ash in Concrete Pavements
AB  - The objective of this research project is to develop new classification for fly ash for use in concrete pavements. Develop techniques to use more fly ash as a replacement for cement in concrete pavements.
KW  - Cement
KW  - Concrete pavements
KW  - Fly ash
KW  - Pavement performance
KW  - Replacement
KW  - Research projects
UR  - https://trid.trb.org/view/1230476
ER  - 

TY  - ABST
AN  - 01462254
TI  - Concrete Pavement Road Map: Mix Design Research Track
AB  - This research project will take a leadership role in working with the States and industry to accomplish the objectives defined for concrete mix design in the Concrete Pavement Road Map. This will include further evaluation, development, and integration of existing software and guidelines concerning mixture component compatibility, along with the development of improved test methods and guidance.
KW  - Admixtures
KW  - Concrete pavements
KW  - Guidelines
KW  - Mix design
KW  - Pavement design
KW  - Research projects
KW  - Software
KW  - Test procedures
UR  - https://trid.trb.org/view/1230475
ER  - 

TY  - ABST
AN  - 01462253
TI  - Moisture Damage
AB  - The objective of this research project is to determine the affinity of asphalts and modified asphalts to aggregates through evaluation of mechanical and thermodynamic tests. Develop test methods to determine the rates of diffusion of moisture through asphalt binders, mastics, and mixtures. Characterize the mineralogical and chemical properties of the materials.
KW  - Aggregates
KW  - Asphalt mixtures
KW  - Binders
KW  - Chemical properties
KW  - Moisture content
KW  - Moisture damage
KW  - Research projects
KW  - Test procedures
KW  - Thermodynamics
UR  - https://trid.trb.org/view/1230474
ER  - 

TY  - ABST
AN  - 01462252
TI  - Fatigue Damage
AB  - The objective of this research project is to develop a fundamental understanding of the material properties and mechanics associated with fatigue through a systematic process of test method development, modeling, and field validation.
KW  - Fatigue (Mechanics)
KW  - Field tests
KW  - Mechanical properties
KW  - Moisture damage
KW  - Research projects
KW  - Validation
UR  - https://trid.trb.org/view/1230473
ER  - 

TY  - ABST
AN  - 01462251
TI  - Engineered Materials
AB  - This research project will address increasing functional demand on pavements and decreasing sources of funding and virgin materials through engineering. Create pavements designed for specific conditions while optimizing the use of recycled/reused materials and additives.
KW  - Additives
KW  - Engineered materials
KW  - Pavement design
KW  - Pavement performance
KW  - Recycled materials
KW  - Research projects
UR  - https://trid.trb.org/view/1230472
ER  - 

TY  - ABST
AN  - 01462250
TI  - Vehicle-Pavement Interaction
AB  - This research project will examine the interaction between the rubber and the road, especially as it relates to special design considerations for geometry, safety, and noise. This includes evaluating pavement textures, developing lab test protocols, parametric studies, and building a vehicle dynamics and interface stress distribution database.
KW  - Pavement design
KW  - Research projects
KW  - Rolling contact
KW  - Rubber
KW  - Texture
KW  - Tire/pavement noise
KW  - Vehicle dynamics
UR  - https://trid.trb.org/view/1230471
ER  - 

TY  - ABST
AN  - 01462249
TI  - Validation Sites
AB  - Test methods and models developed in the consortium research areas will be validated with real materials and pavement test sections. This area involves identifying materials and test sections with known performance suitable for validation. It also involves construction of new test sections to validate new materials.
KW  - Pavement design
KW  - Pavement performance
KW  - Pavement test sections
KW  - Paving
KW  - Research projects
KW  - Test procedures
KW  - Test sections
KW  - Validation
UR  - https://trid.trb.org/view/1230470
ER  - 

TY  - ABST
AN  - 01462248
TI  - Measures of Pedestrian Exposure to Risk
AB  - This research project will develop and test a methodology to quantify pedestrian exposure to risk by identifying previous pedestrian exposure metrics, developing a new metric that addresses limitations of previous metrics, and testing and refining the new metric in the field.
KW  - Crash risk forecasting
KW  - Metrics (Quantitative assessment)
KW  - Pedestrian safety
KW  - Pedestrian-vehicle crashes
KW  - Research projects
KW  - Risk assessment
KW  - Testing
UR  - https://trid.trb.org/view/1230469
ER  - 

TY  - ABST
AN  - 01462247
TI  - Real-Time Pedestrian Detection System
AB  - The objective of this research project is to develop a real-time vision system that detects moving or stationary pedestrians on sidewalks and along roadways and would be able to warn drivers of pending crashes. This project is part of the FHWA Exploratory Advanced Research (EAR) Program.
KW  - Driver information systems
KW  - Pedestrian detectors
KW  - Pedestrian movement
KW  - Pedestrian safety
KW  - Pedestrian-vehicle crashes
KW  - Real time information
KW  - Research projects
KW  - Warning systems
UR  - https://trid.trb.org/view/1230468
ER  - 

TY  - ABST
AN  - 01462246
TI  - Evaluation of Pedestrian/Bicycle Safety Measures
AB  - This research project will study the effectiveness of new and innovative countermeasures in reducing pedestrian fatalities, injuries, conflicts, and other surrogate measures.
KW  - Bicycle crashes
KW  - Bicycle travel
KW  - Crash injuries
KW  - Fatalities
KW  - Pedestrian safety
KW  - Pedestrian-vehicle crashes
KW  - Research projects
KW  - Traffic conflicts
UR  - https://trid.trb.org/view/1230467
ER  - 

TY  - ABST
AN  - 01462245
TI  - Effects of Terrain on Vehicle Trajectories
AB  - This research project will study vehicle dynamics and crash simulations to determine the need for revisions to the criteria for slope traversability in the Roadside Design Guide and highway design manuals. The analysis will consider a range of vehicles, various speeds and angles of departure, different side and back slope conditions, and road types.
KW  - Highway design
KW  - Ran off road crashes
KW  - Research projects
KW  - Slopes
KW  - Terrain
KW  - Vehicle dynamics
KW  - Vehicle trajectories
UR  - https://trid.trb.org/view/1230466
ER  - 

TY  - ABST
AN  - 01462244
TI  - Cable Median Barrier Design & Placement Analysis
AB  - Analyze the effects of barrier placement, number of cables, post spacing, presence of curbs, and other features on safety performance to improve guidelines for the design and placement of cable median barriers. Utilize Finite Element Analysis models of cable barrier systems and vehicle dynamics models to consider both low- and high-tension cable systems for an array of vehicle types, varying median configurations, and impact conditions.
KW  - Cable barriers
KW  - Curbs
KW  - Finite element method
KW  - Highway safety
KW  - Median barriers
KW  - Posts
KW  - Ran off road crashes
KW  - Research projects
KW  - Spacing
KW  - Vehicle dynamics
UR  - https://trid.trb.org/view/1230465
ER  - 

TY  - ABST
AN  - 01462243
TI  - Analysis of the Impacts on Existing Roadside Hardware of Updated Crashworthiness Criteria
AB  - The objective of this research project is to determine through crash simulations whether commonly deployed roadside safety hardware will meet the updated safety performance criteria. Update or create new vehicle hardware models to determine if there are practical options to upgrade existing hardware to meet the new criteria.
KW  - Crashworthiness
KW  - Hardware
KW  - Highway safety
KW  - Ran off road crashes
KW  - Research projects
KW  - Roadside
KW  - Roadside safety hardware
KW  - Roadside structures
UR  - https://trid.trb.org/view/1230464
ER  - 

TY  - ABST
AN  - 01462242
TI  - Future ITS Development
AB  - This project will determine how advanced crosscutting technologies in the ITS area, such as real-time measurements from multiple sensors and the next generation of telecommunication systems, can contribute to transportation systems that are safer and more efficient.
KW  - Intelligent transportation systems
KW  - Next generation design
KW  - Real time control
KW  - Real time information
KW  - Research projects
KW  - Sensors
KW  - Technological innovations
KW  - Telecommunications
UR  - https://trid.trb.org/view/1230463
ER  - 

TY  - ABST
AN  - 01462268
TI  - Intelligent Construction System (ICS) Computer-Based Field Curing Tool for Concrete Pavement
AB  - Perform ruggedness tests on the several methods for determining the CTE of concrete cores or molded cylinders and report recommendations to the American Association of State Highway and Transportation Officials Subcommittee on Materials. Continue gathering data on the coefficient of thermal expansion and coarse aggregate type identification for cores taken from portland cement concrete pavements in the long-term pavement performance, with data provided for addition to the Long-Term Pavement Performance database.
KW  - Construction
KW  - Curing agents
KW  - Guidelines
KW  - High performance materials
KW  - HIPERPAVE (Computer software)
KW  - Pavement design
KW  - Pavement performance
KW  - Paving
KW  - Real time information
KW  - Research projects
UR  - https://trid.trb.org/view/1230489
ER  - 

TY  - ABST
AN  - 01462267
TI  - Coefficient of Thermal Expansion (CTE) Research and Test Development
AB  - This research project will perform ruggedness tests on the several methods for determining the coefficient of thermal expansion (CTE) of concrete cores or molded cylinders and report recommendations to the American Association of State Highway and Transportation Officials Subcommittee on Materials. Continue gathering data on the coefficient of thermal expansion and coarse aggregate type identification for cores taken from portland cement concrete pavements in the long-term pavement performance, with data provided for addition to the Long-Term Pavement Performance database.
KW  - Coarse aggregates
KW  - Coefficient of thermal expansion
KW  - Concrete
KW  - Concrete pavements
KW  - Cores (Specimens)
KW  - Data collection
KW  - Long-Term Pavement Performance Program
KW  - Pavement performance
KW  - Portland cement concrete
KW  - Research projects
KW  - Thermal expansion
UR  - https://trid.trb.org/view/1230488
ER  - 

TY  - ABST
AN  - 01462266
TI  - Geotextile Separation Layer for Aggregate Base Courses
AB  - This research project will provide a clear quantification of the long-term benefits a pavement structure can receive focusing specifically on the base and subgrade separation capability of geotextiles.
KW  - Aggregate gradation
KW  - Base course (Pavements)
KW  - Benefits
KW  - Geotextiles
KW  - Pavement performance
KW  - Research projects
KW  - Subgrade (Pavements)
UR  - https://trid.trb.org/view/1230487
ER  - 

TY  - ABST
AN  - 01462265
TI  - Concrete Extrusion Workability
AB  - The objective of this research project is to evaluate or develop devices that can be used to determine the workability of paving concrete mixtures. Relate paste and mortar rheology with concrete workability. The project will work with National Institute of Standards and Technology, Virtual Cement and Concrete Testing Laboratory.
KW  - Admixtures
KW  - Concrete tests
KW  - Mortar
KW  - Pastes
KW  - Research projects
KW  - Rheology
KW  - Workability
UR  - https://trid.trb.org/view/1230486
ER  - 

TY  - ABST
AN  - 01462264
TI  - Aggregate Research Investigation
AB  - This research project will perform an investigation of properties related to aggregate shape, angularity, and texture; the aggregate interfacial zone and bond in concrete and asphalt mixtures; and ways of quickly identifying deleterious aggregate materials or constituents, including fine aggregate blending and grading in concrete and research on the effect of aggregate interface properties in hot-mix asphalt and warm-mix asphalt.
KW  - Aggregates
KW  - Angularity
KW  - Asphalt mixtures
KW  - Blending
KW  - Fine aggregates
KW  - Hot mix asphalt
KW  - Research projects
UR  - https://trid.trb.org/view/1230485
ER  - 

TY  - ABST
AN  - 01462263
TI  - New Methods to Identify Oxidized Layers/Durability
AB  - This research project will establish a framework with pavement management systems in mind for rapid field and laboratory tests which can capture relationship between asphalt pavement oxidation and embrittlement and the subsequent loss in pavement durability.
KW  - Asphalt pavements
KW  - Durability tests
KW  - Field tests
KW  - Laboratory tests
KW  - Oxidation
KW  - Pavement layers
KW  - Pavement management systems
KW  - Research projects
UR  - https://trid.trb.org/view/1230484
ER  - 

TY  - ABST
AN  - 01462262
TI  - Computer Aided Mix Design: Asphalt Pavements
AB  - The objective of this research project is the development of computer aided mix design tools to provide increased aggregate sensitivity of the Superpave Mix Design to reduce the risk of low durability asphalt mixtures.
KW  - Asphalt mixtures
KW  - Asphalt pavements
KW  - Computer aided design
KW  - Durability
KW  - Mix design
KW  - Research projects
KW  - Sensitivity analysis
KW  - Superpave
UR  - https://trid.trb.org/view/1230483
ER  - 

TY  - ABST
AN  - 01462261
TI  - Alkali-Silica Reactivity (ASR) Research to Classify Aggregates and Provide ASR Mitigation in Concrete
AB  - The objective of this projects is to assess the potential of innovative quick chemical tests of aggregates and participate with alkali-silica reactivity (ASR) tests of blends and mixtures in mortar and concrete.
KW  - Admixtures
KW  - Aggregates
KW  - Alkali silica reactions
KW  - Blends
KW  - Chemical analysis
KW  - Concrete
KW  - Mix design
KW  - Mortar
KW  - Research projects
UR  - https://trid.trb.org/view/1230482
ER  - 

TY  - ABST
AN  - 01462260
TI  - Understanding Moisture Damage in Asphalt Pavements-Phase I
AB  - The objective of this research project is to establish and conduct fundamental research on moisture damage in asphalt pavements.
KW  - Asphalt pavements
KW  - Moisture content
KW  - Moisture damage
KW  - Pavement distress
KW  - Pavement performance
KW  - Research projects
UR  - https://trid.trb.org/view/1230481
ER  - 

TY  - ABST
AN  - 01462259
TI  - Procedure for Identifying Deleterious Materials in Hot-mix asphalt
AB  - The objective of this research projects is to develop methods to identify and quantify surface-active clays and other contaminants, which contribute to moisture damage of hot-mix asphalt.
KW  - Clay
KW  - Contaminants
KW  - Hot mix asphalt
KW  - Moisture content
KW  - Moisture damage
KW  - Pavement distress
KW  - Research projects
UR  - https://trid.trb.org/view/1230480
ER  - 

TY  - ABST
AN  - 01462258
TI  - Full-Scale Aggregate Base Design and Construction
AB  - This research project will provide a best practice manual to advance the state-of-the-practice for base course construction based on innovative pavement design and materials characterization, test section construction and instrumentation, and development of relevant pavement models to support pavement design methodology.
KW  - Aggregates
KW  - Base course (Pavements)
KW  - Best practices
KW  - Construction
KW  - Pavement design
KW  - Pavement test sections
KW  - Paving
KW  - Research projects
KW  - State of the practice
UR  - https://trid.trb.org/view/1230479
ER  - 

TY  - ABST
AN  - 01462282
TI  - Long-Term Pavement Performance 20-Year Report
AB  - This report will document the research and analytical activities undertaken by FHWA in the conduct of the Long-Term Pavement Performance program. This document will provide an overview of the 20-year Long-Term Pavement Performance Program.
KW  - Long-Term Pavement Performance Program
KW  - Pavement design
KW  - Pavement performance
KW  - Research projects
KW  - Service life
UR  - https://trid.trb.org/view/1230503
ER  - 

TY  - ABST
AN  - 01462281
TI  - Measuring the Effectiveness of State Construction Quality Assurance Programs
AB  - This research project will develop a procedure for measuring the effectiveness of State construction quality assurance programs and provide guidelines for use of the procedure.
KW  - Construction
KW  - Construction management
KW  - Guidelines
KW  - Pavement performance
KW  - Paving
KW  - Quality assurance
KW  - Quality control
KW  - Research projects
UR  - https://trid.trb.org/view/1230502
ER  - 

TY  - ABST
AN  - 01462280
TI  - Fiber-Reinforced Polymer (FRP) in Concrete Pavement
AB  - This research project will develop guidelines for the design and use of second-generation fiber-reinforced polymer (FRP) dowels in jointed pavements and FRP reinforcement in continuously reinforced concrete pavements.
KW  - Concrete pavements
KW  - Dowels (Fasteners)
KW  - Fiber reinforced polymers
KW  - Pavement design
KW  - Reinforced concrete
KW  - Reinforced concrete pavements
KW  - Research projects
UR  - https://trid.trb.org/view/1230501
ER  - 

TY  - ABST
AN  - 01462279
TI  - Concrete Mix Optimization Software
AB  - This research project will develop computer-based guidelines for job-specific optimization of paving concrete to help materials engineers and suppliers make day-to-day decisions about how to best proportion a mix to meet their desired criteria.
KW  - Admixtures
KW  - Guidelines
KW  - Materials
KW  - Mix design
KW  - Optimization
KW  - Research projects
KW  - Software
UR  - https://trid.trb.org/view/1230500
ER  - 

TY  - ABST
AN  - 01462278
TI  - Percent Within Limits Risk Analysis Software
AB  - This research project will develop computer program capable of analyzing the risks associated with multi-characteristic acceptance systems and pay schedules based on the percent within limits quality measure.
KW  - Acceptance tests
KW  - Computer programs
KW  - Pay schedules
KW  - Quality control
KW  - Research projects
KW  - Risk analysis
KW  - Software
UR  - https://trid.trb.org/view/1230499
ER  - 

TY  - ABST
AN  - 01462277
TI  - Alternatives to the Use of Contractor Test Results
AB  - The objective of this research project is to develop guidance for highway agencies that are short-staffed and want to make better use of their inspection and testing personnel.
KW  - Acceptance tests
KW  - Contractors
KW  - Guidelines
KW  - Inspection
KW  - Research projects
KW  - Test sections
KW  - Testing
UR  - https://trid.trb.org/view/1230498
ER  - 

TY  - ABST
AN  - 01462276
TI  - Geosynthetics in Pavements
AB  - The objective of this project is to provide a comprehensive reference to the pavement design engineer by presenting state-of-the-art methods and practice on the use of geosynthetics in design and construction of permanent (paved) roadways. A roadmap will be developed to identify additional work needed in terms of testing, modeling and specifications to improve the application of geosynthetic materials to pavement design and construction.
KW  - Best practices
KW  - Geosynthetics
KW  - Pavement design
KW  - Paving
KW  - Research projects
KW  - Specifications
KW  - State of the art
UR  - https://trid.trb.org/view/1230497
ER  - 

TY  - ABST
AN  - 01462275
TI  - Synthesis on Current State of the Practice in Composite Pavements
AB  - This study, part of a larger pooled fund study being led by Minnesota Department of Transportation, will develop a synthesis document on the state of the practice and knowledge on the design, construction, and performance of composite pavements. The assessment will include both national and international projects and practices.
KW  - Best practices
KW  - Composite pavements
KW  - Pavement design
KW  - Pavement performance
KW  - Paving
KW  - Research projects
KW  - State of the practice
UR  - https://trid.trb.org/view/1230496
ER  - 

TY  - ABST
AN  - 01462293
TI  - Speed, Signature, Acceleration and Jerk - Loop Sensor
AB  - This project utilizes provides one of the sensor tools needed to provide information to the signal transition logic on the actual composition of the traffic flow approaching an intersection, ramp, traffic circle, arterial section, or freeway section.
KW  - Acceleration
KW  - Arterial highways
KW  - Freeway operations
KW  - Ramps (Interchanges)
KW  - Research projects
KW  - Roundabouts
KW  - Sensors
KW  - Traffic circles
KW  - Traffic flow
KW  - Traffic speed
UR  - https://trid.trb.org/view/1230514
ER  - 

TY  - ABST
AN  - 01462292
TI  - Nondestructive Evaluation of Loop Sensor Installation
AB  - This project utilizes Ground Penetration Radar (GPR) to analyze the loop wire and sealant around inductive loop installations. It measures the locations and sizes of cracks, the sealant, the loop wire, and the pavement. This should allow determination of whether the loop was installed correctly in accord with specifications and whether it needs maintenance.
KW  - Crack sealants
KW  - Fracture mechanics
KW  - Ground penetrating radar
KW  - Loop detectors
KW  - Pavement maintenance
KW  - Research projects
KW  - Sensors
UR  - https://trid.trb.org/view/1230513
ER  - 

TY  - ABST
AN  - 01462291
TI  - Cooperative Intersection Collision Avoidance Systems (CICAS) Supported by the Infrastructure Consortium (IC)
AB  - Partnering with automobile manufacturers, the Infrastructure Consortium (IC) will design, develop, and test prototype a Cooperative Intersection Collision Avoidance System (CICAS) technologies in support of the U.S. Department of Transportation's CICAS Initiative. Following testing of prototype systems, the IC will support field operational testing of the CICAS technologies.
KW  - Automobile manufacturers
KW  - Crash avoidance systems
KW  - Field tests
KW  - Prototypes
KW  - Research projects
KW  - Technological innovations
UR  - https://trid.trb.org/view/1230512
ER  - 

TY  - ABST
AN  - 01462286
TI  - Nontraditional Intersections/Interchanges: Informational Report
AB  - This research project will develop design, safety, and operational information on four novel intersections and two interchanges that are expected to be more efficient in terms of capacity and improved safety in comparison to conventional intersections.
KW  - Highway design
KW  - Highway operations
KW  - Information technology
KW  - Interchanges and intersections
KW  - Intersection elements
KW  - Research projects
KW  - Traffic safety
UR  - https://trid.trb.org/view/1230507
ER  - 

TY  - ABST
AN  - 01462285
TI  - Field Evaluation of Continuous-Flow Intersection and Diverging Diamond Interchange
AB  - The objective of this research project is to conduct safety and operational field evaluations of continuous-flow intersections in Louisiana and Utah and a diverging diamond interchange to be constructed in Kansas City, Missouri.
KW  - Continuous flow intersections
KW  - Diamond interchanges
KW  - Interchanges and intersections
KW  - Intersection elements
KW  - Research projects
KW  - Traffic control devices
KW  - Traffic flow
UR  - https://trid.trb.org/view/1230506
ER  - 

TY  - ABST
AN  - 01462319
TI  - Scour in Cohesive Soils
AB  - Scour for cohesive soils is a very complex phenomenon that is not completely understood. The research study will study the incipient motion of cohesive soils and the influence of turbulence on the erodibility of soils, which could significantly enhance the scour prediction.
KW  - Bridge design
KW  - Bridge foundations
KW  - Cohesive soils
KW  - Erosion control
KW  - Research projects
KW  - Scour
UR  - https://trid.trb.org/view/1230540
ER  - 

TY  - ABST
AN  - 01462318
TI  - Ex Situ Scour Testing Device
AB  - The intent of this study is to develop an Ex situ Scour Testing Device (ESTD) that can be used for estimating bridge scour in cohesive soils. The ESTD technology can determine the erosion rate of soil samples, which are used to transfer the soil test results to the bridge pier scour computations. The ESTD technology is capable to simulate pressure fluctuations that are associated with the extreme turbulence that occurs around a bridge pier.
KW  - Bridge design
KW  - Bridge foundations
KW  - Bridge piers
KW  - Cohesive soils
KW  - Erosion
KW  - Research projects
KW  - Scour
KW  - Soil tests
UR  - https://trid.trb.org/view/1230539
ER  - 

TY  - ABST
AN  - 01462311
TI  - Global Positioning System (GPS) Surface Observation System Installation for Integrated Perceptible Water Vapor (IPWV)
AB  - The installation of GPS Surface Observation System (GSOS) meteorological sensors at NDGPS sites provides useful weather observations and the information needed to calculate atmospheric water vapor.
KW  - Atmospheric water vapor
KW  - Global Positioning System
KW  - Meteorology
KW  - Precipitation (Meteorology)
KW  - Research projects
KW  - Sensors
KW  - Water vapor
KW  - Weather
KW  - Weather forecasting
UR  - https://trid.trb.org/view/1230532
ER  - 

TY  - ABST
AN  - 01462310
TI  - National Environmental Policy Act Environmental Investigations in Support of NDGPS
AB  - The National Differential Global Positioning System (NDGPS) program serves transportation, public safety, and scientific applications. As part of this effort, the Federal Highway Administration (FHWA) presently is gathering information to prepare documentation to support a Finding Of No-Significant Impact (FONSI) as outlined in the NDGPS Environmental Assessment (PEA), which was prepared for the entire NDGPS Program.
KW  - Differential Global Positioning System
KW  - Environmental impacts
KW  - Environmental policy
KW  - Finding of no significant impact
KW  - Global Positioning System
KW  - Research projects
UR  - https://trid.trb.org/view/1230531
ER  - 

TY  - ABST
AN  - 01462305
TI  - In-Depth Laboratory Evaluation of Fatigue Cracks in Steel Bridges
AB  - As part of the Steel Bridge Testing Program, this research project will complete laboratory testing comparing capabilities of state-of-the-art nondestructive evaluation technologies for the detection of growing cracks in steel girders.
KW  - Bridge design
KW  - Crack detection
KW  - Cracking
KW  - Nondestructive tests
KW  - Research projects
KW  - State of the art
KW  - Steel bridges
KW  - Technological innovations
UR  - https://trid.trb.org/view/1230526
ER  - 

TY  - ABST
AN  - 01462304
TI  - Steel Bridge One-Coat Paint Study
AB  - This project will identify durable and economically viable commercial one-coat paint system(s) applicable to steel bridges. Interim reports will be available in late 2008.
KW  - Coatings, fillers and paints
KW  - Painting
KW  - Research projects
KW  - Steel
KW  - Steel bridges
KW  - Steel structures
UR  - https://trid.trb.org/view/1230525
ER  - 

TY  - ABST
AN  - 01462303
TI  - Steel Bridge 100-Year Coating Study: Phase 1
AB  - This project will evaluate existing polymeric and metallic coating materials, which have demonstrated possibilities of providing 100-year, maintenance-free, service life on steel bridges.
KW  - Bridge maintenance
KW  - Bridges
KW  - Coatings, fillers and paints
KW  - Metallic composites
KW  - Research projects
KW  - Service life
KW  - Steel bridges
UR  - https://trid.trb.org/view/1230524
ER  - 

TY  - ABST
AN  - 01462301
TI  - Nondestructive Evaluation (NDE) Web Manual
AB  - The objective of this research project is to development of a basic framework of a Web-based manual, comparing nondestructive evaluation (NDE) capabilities for bridges, pavements, and other ancillary structures.
KW  - Bridges
KW  - Computer program documentation
KW  - Nondestructive tests
KW  - Pavements
KW  - Research projects
KW  - Websites (Information retrieval)
UR  - https://trid.trb.org/view/1230522
ER  - 

TY  - ABST
AN  - 01462300
TI  - Alkali-Silica Reaction (ASR) Research and Deployment Program
AB  - Elucidate the ASR mechanism, develop accelerated reliable laboratory methods and nondestructive evaluation methods for field use and methodology for rehabilitation of structures affected with ASR with cost effective techniques. Interim progress reports on various objectives as outlined above will be available.
KW  - Alkali silica reactions
KW  - Cost effectiveness
KW  - Laboratory tests
KW  - Nondestructive tests
KW  - Rehabilitation (Maintenance)
KW  - Research projects
UR  - https://trid.trb.org/view/1230521
ER  - 

TY  - ABST
AN  - 01462298
TI  - Small Business Innovation Research: 3-66 Signal Transition Logic--Phase II
AB  - This research project will implement the National Cooperative Highway Research Program research 3-66 signal transition logic into a real-world, advanced transportation controller (ATC). Signal transition logic utilizes dynamic programming algorithms to choose the next series of signal states to arrive in a desired state to minimize both delay and other criteria when faced with unusual traffic sensor inputs such as trains, fire trucks, police, ambulances, funeral processions, and tractor trailers. Current technologies only allow non-optimal processing of these items as preempts.
KW  - Algorithms
KW  - Research projects
KW  - Special events
KW  - Technological innovations
KW  - Traffic control centers
KW  - Traffic signal control systems
KW  - Traffic signal timing
UR  - https://trid.trb.org/view/1230519
ER  - 

TY  - ABST
AN  - 01464268
TI  - Research for AASHTO Standing Committee on Highways. Task 275. SCOH Strategic Plan Support
AB  - The objective of this project is to develop a new strategic plan for the </span><span style="FONT-SIZE: 11.5pt">AASHTO Standing Committee on Highways (SCOH). </span></div>
KW  - American Association of State Highway and Transportation Officials
KW  - Highways
KW  - Planning and design
KW  - Strategic planning
KW  - Transportation planning
UR  - http://www.trb.org/TRBNet/ProjectDisplay.asp?ProjectID=2603
UR  - https://trid.trb.org/view/1232497
ER  - 

TY  - RPRT
AN  - 01129338
AU  - City of Cedar Falls
AU  - Iowa Department of Transportation
AU  - Federal Highway Administration
TI  - Finding of No Significant Impact for Greenhill Road Extension from Hudson Road to 27th Street, STP-U-1185(635)--70-07, City of Cedar Falls, Iowa
PY  - 2009/01/15
SP  - v.p.
AB  - The Federal Highway Administration (FHWA) has determined that the Greenhill Road Extension from Hudson Road to 27th Street in Cedar Falls, Iowa, will not have any significant impact on the human and natural environment.  This Finding of No Significant Impact (FONSI) is based on the attached Environmental Assessment which has been independently evaluated by the FHWA and determined to adequately and accurately discuss the need, environmental issues, impacts of the proposed project and appropriate mitigation measures.  It provides sufficient evidence and analysis for determining that an Environmental Impact Statement is not required.
KW  - Cedar Falls (Iowa)
KW  - Environmental impact analysis
KW  - Highway planning
UR  - https://trid.trb.org/view/889634
ER  - 

TY  - ABST
AN  - 01462078
TI  - A Multiple-Sensor Wireless Network for Bridge Structural Health Monitoring
AB  - The ability to monitor the condition of a bridge structure to detect damage or change in condition at early stages is of significant interest to many bridge owners. The objective of this study is to develop and test a bridge structural health monitoring system that is low cost and efficient. The system combines various types of sensor information and provides early warning of critical structural problems through cooperative data processing and diagnosis. With minimal human intervention, the system can potentially achieve real-time "smart" health monitoring or primary and secondary bridge structures such as beams, truss, joints, welds that are critical for bridge integrity.
KW  - Bridge design
KW  - Bridge structures
KW  - Bridges
KW  - Remote sensing
KW  - Research projects
KW  - Sensors
KW  - Structural health monitoring
KW  - Structural integrity
KW  - Wireless communication systems
UR  - https://trid.trb.org/view/1230298
ER  - 

TY  - SER
AN  - 01128975
JO  - Civil Engineering Studies, Illinois Center for Transportation Series
PB  - University of Illinois, Urbana-Champaign
AU  - Roesler, Jeffery R
AU  - Huntley, J Gregory
AU  - University of Illinois, Urbana-Champaign
AU  - Illinois Department of Transportation
AU  - Federal Highway Administration
TI  - Performance of I-57 Recycled Concrete Pavement
PY  - 2009/01/09/Final Report
IS  - 09-032
SP  - 89p
AB  - In 1986-1987 the Illinois Department of Transportation (IDOT) constructed a demonstration project on I-57 near Effingham, Illinois to evaluate the viability of recycling an existing jointed reinforced concrete pavement for use as its primary aggregates in the surface mixture of a 10-in. continuously reinforced concrete pavement (CRCP). This CRCP test section on northbound and southbound I-57 contained a 7-in. cement-stabilized subbase and a 13.5-ft extended lane width. Longitudinal reinforcement bars were placed using the tube feeding method. Functional and structural data, including falling weight deflectometer testing (FWD), distress surveys, friction testing, surface profile testing, and conditions rating surveys were collected periodically throughout the life of the pavement. Structural test data demonstrate a pavement section that has exhibited excellent load carrying capacity (less than 0.006-in. deflection under 9-kip load), and load transfer efficiency across the transverse cracks. Furthermore, the cement-treated subbase and subgrade have performed well over the CRCP’s service life. There also was no structural response or cracking difference between the sections with the stabilized base extended under the shoulder versus the base that is only a standard lane width. Few structural distresses are observed except for the prominent amount of longitudinal cracking that appears over the reinforcement bars in all lanes. This abnormal cracking pattern has been noted for many years and has been attributed to settlement cracking associated with the original tube feeding process, the bar size selected, the bulk density of the concrete with recycled concrete aggregate (RCA), and the higher drying shrinkage of RCA concrete. The section has developed a significant amount of localized distresses and patches over the past 5 years as a result of the further deterioration of this longitudinal cracking distress. A petrographic examination has concluded that there is no deleterious alkali-silica reaction occurring in the RCA test section, and that the air void system is normal. The mean transverse crack spacing is approximately 1.5 ft, which is significantly shorter than normal CRCP and can be attributed to the greater drying shrinkage potential, slightly lower tensile strength, and reduced fracture properties of RCA. Functionally, the pavement shows good skid resistance and fair-to-good ride quality. Overall, the performance of this CRCP with RCA has exceeded roughly 50% of the 10-in. CRCP within Illinois in terms of age and 25% in terms of traffic. Based on the 20 years of performance on the I-57 CRCP section, the future use of RCA on concrete pavement in Illinois can be approached with confidence and optimism. IDOT’s original material assessment has avoided any material-related distress such as freeze–thaw damage (D-cracking), ASR, and corrosion of the steel from excess chloride content. Future application of RCA in concrete pavements should consider its higher drying shrinkage potential and lower tensile strength and fracture energy. Future implementation of moist curing on concrete pavements with RCA or use of two-lift construction technique would minimize risk of the extremely close crack spacing due to excessive drying shrinkage noted on the I-57 CRCP test section.
KW  - Continuously reinforced concrete pavements
KW  - Deflection
KW  - Load transfer
KW  - Longitudinal cracking
KW  - Pavement performance
KW  - Recycled concrete aggregate
KW  - Ride quality
KW  - Shrinkage
KW  - Skid resistance
KW  - Tensile strength
KW  - Transverse cracking
UR  - http://www.ict.uiuc.edu/Publications/report%20files/FHWA-ICT-09-032.pdf
UR  - http://ntl.bts.gov/lib/31000/31000/31020/ICT-09-032.pdf
UR  - https://trid.trb.org/view/889134
ER  - 

TY  - RPRT
AN  - 01129339
AU  - Iowa Department of Transportation
AU  - Illinois Department of Transportation
AU  - Federal Highway Administration
TI  - Interstate 74 Quad Cities Corridor Study, Scott County, Iowa and Rock Island County, Illinois: Final Environmental Impact Statement and Section 4(f) Statement
PY  - 2009/01/08
SP  - v.p.
AB  - The Iowa and Illinois Departments of Transportation (DOTs) and the Federal Highway Administration (FHWA) are proposing improvements to the Interstate 74 (I-74) corridor in the Quad Cities from Avenue of the Cities (23rd Avenue) in Moline, Illinois, to 1 mile north of 53rd Street in Davenport, Iowa.  The study corridor traverses the cities of Moline, Bettendorf, and Davenport and includes a crossing of the Mississippi River.  This Final Environmental Impact Statement (FEIS) is presented in the form of a condensed FEIS.  In addition to summarizing the information in the Draft Environmental Impact Statement (DEIS) released in 2003, this condensed FEIS presents information that has changed since the circulation of the DEIS and identifies the Preferred Alternative of the project sponsors, the Iowa DOT, the Illinois DOT, and the FHWA.  Other differences from the DEIS include a summary and disposition of the comments received from the public and agencies during the circulation of the DEIS and a more detailed discussion of mitigation for impacts to resources.  The DEIS is included on a CD in a sleeve inside the back cover of this document.
KW  - Environmental impact statements
KW  - Highway planning
KW  - Improvements
KW  - Rock Island County (Illinois)
KW  - Scott County (Iowa)
UR  - https://trid.trb.org/view/889636
ER  - 

TY  - ABST
AN  - 01464308
TI  - Effects of Changing Transportation Energy Supplies and Alternative Fuel Sources on Transportation
AB  - Increases in global energy consumption, especially within the transportation sector, are expected to increase demand for oil. Fossil fuel emissions and greenhouse gases from all sources may continue to increase, contributing to air pollution and climate change. As the effects of climate change become more evident, there will be a continual push to move toward energy efficiency and alternative fuels in the transportation sector. Given that the entire transportation sector accounted for more than 90% of all liquid fuel consumption in 2006, it is clear that changes in energy infrastructure and energy sources will affect transportation activities. World population growth and energy demand are inexorably linked, but the fossil-based energy supply is finite. Alternative technologies are emerging in the marketplace and may have the potential to require enormous changes over time in how state departments of transportation (DOTs) operate. Implementation of alternative fuels will also necessitate a change in highway funding strategies. Most of the revenue that DOTs use for the construction, operation, and maintenance of the highway system comes from federal and individual state gas taxes assessed on traditional motor vehicle fuels. The ability to finance future transportation programs has already been negatively affected by various technological, economic, and social changes, and these affects will be magnified over time. The objectives of this research are (1) to determine how the mandate, role, funding, and operations of DOTs will likely be affected by future changes in long-term energy supply and demand and (2) to identify strategies and actions that can be used by the DOTs to plan and prepare for these effects.
KW  - Alternate fuels
KW  - Climate change
KW  - Demographics
KW  - Fuel costs
KW  - Land use planning
KW  - Technological innovations
UR  - http://www.trb.org/TRBNet/ProjectDisplay.asp?ProjectID=2632
UR  - https://trid.trb.org/view/1232537
ER  - 

TY  - ABST
AN  - 01549596
TI  - Research Program Design---Administration of Highway and Transportation Agencies. Implications of Performance Standards, Conformity-Style Approaches, and Other Mechanisms for Assessing Greenhouse Gas (GHG) Reduction Strategies and Integrating GHG Objectives into Transportation Decision Making
AB  - The issue of greenhouse gas (GHG) emissions from transportation sources is likely to be addressed in key national legislation in the coming two years, including possibly passage of a national climate and energy bill - such as S. 2191 - as well as potential new provisions in the next surface transportation authorization bill.  Some groups have suggested also modifying the Clean Air Act to include GHG emissions in the transportation conformity process or to establish carbon budgets against which transportation GHG emissions would be compared or both.  Managing GHG emissions from transportation sources will entail analysis and decision making at several levels of planning and possibly changes in the underlying process currently used in transportation system planning. New legislation may influence how responsible government agencies develop, coordinate, monitor, and maintain Metropolitan and Statewide Plans and Transportation Improvement Programs, project-level plans and related environmental reviews, and the relationships among these various documents and national-level plans, for example, multi-sector cap-and-trade strategies that may be adopted in national legislation. Some states departments of transportation (DOTs) already have begun to analyze GHG emissions as part of their transportation planning processes and in some cases as part of their environmental review documents.  For example, New York's 2002 Energy Plan calls for "Examining and analyzing the transportation system's energy consumption and air emissions when long-range plans and Transportation Improvement Programs are adopted." The state's DOT has responsed by analyzing GHG emissions as part of its Statewide and Metropolitan Planning processes for regionally significant projects and as part of its environmental review process.  Other States such as California and Washington are also starting to analyze GHG emissions as part of these processes, often in response to State Action Plans or Executive Orders. The transportation community has been promoting the integration of the transportation planning and environmental review processes for a number of years.  Provisions in SAFETEU-LU require DOTs and metropolitan planning organizations (MPOs) to consult with environmental agencies and to consider available environmental maps and other data as part of their long range planning processes.  While there currently are no specific requirements for integrating climate change into these processes, future legislation is likely to include such requirements.  To date, states have taken a lead in developing their own analysis techniques for climate change, pursuing a variety of technical approaches.  In addition, public expectations about the types of analysis and regulation that are appropriate for the transportation sector vary from state to state. These several factors favor state-specific approaches as the most effective for management of GHG emissions from transportation. In addition, important necessary elements of management strategy are beyond the control of DOTs and MPOs, such as the setting, implementation, and enforcement of vehicle fuel efficiency and pollution emissions standards. Nevertheless, a national-level policy for achieving mobile-source GHG-reductions could provide a basis for ensuring consistency of objectives, range of strategies to be considered, scale of analyses, and computational models to be used in developing plans for managing GHG emissions from transportation sources. Developing such a policy presents major challenges. For example, many DOTs and MPOs have found that the conformity processes developed to enforce provisions of the Clean Air Act are costly, time-consuming, and at best produce only marginal improvements in projected air quality. The computational models developed to support conformity analyses have proven to be difficult to adjust to represent the impact of cleaner engines, cleaner fuels, and other changes in technology that are likely to produce the greatest reductions in air pollution emissions. Agencies are concerned that adoption of a conformity process for managing GHG emissions will have similar shortcomings. A meaningful alternative to the conformity process would enhance agencies' abilities to develop effective GHG management plans. The objective of this project will be to provide factual bases for judging the efficacy of a conformity-style approach to managing GHG emissions from transportation and for formulating a meaningful alternative approach that DOTs and MPOs can use. The project will help policy makers to understand (a) how a conformity-style approach to GHG emissions would affect states and metro areas, (b) what alternative approaches may be used to effectively evaluate mobile-source GHG emission-management strategies, and (c) in particular whether the "Guidebook Emissions Calculator" presented in the Center for Clean Air Policy's <em>Transportation Emissions Guidebook</em> (the "CCAP Calculator") is an effective estimator of mobile-source GHG.</font></div><div style="MARGIN: 0in 0in 0pt"> </div>
KW  - Air quality management
KW  - Diesel engine exhaust gases
KW  - Emission control devices
KW  - Energy consumption
KW  - Environmental impacts
KW  - Exhaust gases
KW  - Greenhouse gases
KW  - Metropolitan planning organizations
KW  - Pollutants
KW  - State departments of transportation
KW  - Transportation planning
UR  - http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=2481
UR  - https://trid.trb.org/view/1339750
ER  - 

TY  - ABST
AN  - 01548221
TI  - Update to AASHTO 'Pavement Management Guide'
AB  - The objective of this project was to update the current American Association for State Highway and Transportation Officials (AASHTO) Guide for Pavement Management and prepare a revised Guide suitable for consideration and publication by AASHTO.  The project is complete.  The researchers prepared a Guide to Pavement Management with the replacement of the 2001 AASHTO Pavement Management Guide in mind.
KW  - Guides to information
KW  - Pavement management systems
UR  - http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=2757
UR  - https://trid.trb.org/view/1335894
ER  - 

TY  - ABST
AN  - 01626438
TI  - The Effects of Load History and Design Variables on Performance Limit States of
Circular Bridge Columns – Volume 3: Analysis Methods

AB  - This report is the third of three volumes and presents the numerical portion of the research project on the impacts of loading history on
the behavior of reinforced concrete bridge columns. Two independent finite element methods were utilized to accomplish the goal of
this research work. First, fiber-based analysis was utilized which employed the Open System for Earthquake Engineering Simulation
(OpenSees). The second model uses solid elements to predict bar buckling. The model included a segment of reinforcing bar and its
surrounding elements, such as spiral turns and concrete. A series of strain histories from the experimental tests and fiber-based analyses
were applied to the finite element model to study their impacts on the strain limit for reinforcing bar buckling.
Initial analytical investigations have shown significant impact of load history on the strain demand to lead to reinforcing bar buckling in
the plastic hinge region. The parametric study extended the range of load history types and also studied the effect of reinforcement
detailing on bar buckling. A design approach was developed to include the load history effect on the strain limit state of bar buckling.

KW  - Buckling
KW  - Columns
KW  - Earthquake resistant design
KW  - Limit state design
KW  - Open System for Earthquake Engineering Simulation (OpenSees)
KW  - Reinforced concrete bridges
KW  - Traffic loads
UR  - http://www.dot.state.ak.us/stwddes/research/assets/pdf/4000-072v3.pdf
UR  - https://trid.trb.org/view/1457240
ER  - 

TY  - ABST
AN  - 01626439
TI  - The Effects of Load History and Design Variables on Performance Limit States of
Circular Bridge Columns-- Volume 2: Experimental Observations
AB  - This report is the second of three volumes and presents detailed data and test summaries of the experimental portion of the work. In total
30 large scale reinforced concrete bridge columns are reported in this volume. Recommendations for design and analysis can be found
in Volumes 1 and 3 of this report.

KW  - Bridge design
KW  - Columns
KW  - Experiments
KW  - Limit state design
KW  - Performance measurement
KW  - Reinforced concrete bridges
KW  - Traffic loads
UR  - http://www.dot.state.ak.us/stwddes/research/assets/pdf/4000-072v2.pdf
UR  - https://trid.trb.org/view/1457239
ER  - 

TY  - ABST
AN  - 01462330
TI  - Fatigue Resistance of Rib to Deck Welds in Steel Orthotropic Decks
AB  - This research project will develop welding procedures for fabrication of steel orthotropic bridge decks.  The project will focus on the quantifying the variables affecting the fatigue resistance of rib-to-deck welds. Originally the project was to evaluate the Hybrid Laser Arc Welding (HLAW) process for re-decking the Walt Whitman Bridge in Philadelphia, but project did not get results quickly enough and the scope was expanded to also include conventionally used steel fabrication welding processes.  The project is now evaluating the fatigue resistance of rib-to-deck welds made using HLAW, SAW, and GMAW welding processes at various weld penetrations of fillet, 20%, 40%, 60%, 80% and 100% weld penetration.
KW  - Bridge decks
KW  - Bridge design
KW  - Cracking
KW  - Fabrication
KW  - Fatigue (Mechanics)
KW  - Hybrid Laser Arc Welding
KW  - Philadelphia (Pennsylvania)
KW  - Research projects
KW  - Welding
UR  - https://trid.trb.org/view/1230551
ER  - 

TY  - RPRT
AN  - 01616166
AU  - Gautam, Biraj
AU  - Yuan, Deren
AU  - Abdallah, Imad
AU  - Nazarian, Soheil
AU  - University of Texas, El Paso
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Guidelines for Using Local Materials for Roadway Base and Subbase
PY  - 2009/01//Technical Report
SP  - 126p
AB  - Flexible base materials that meet Texas Department of Transportation (TxDOT) specifications are getting more difficult to purchase in many TxDOT Districts. As a result, high quality materials have to be hauled in long distances, sometimes from other States. This act would significantly increase the costs associated with the construction of roads and subsequent maintenance and rehabilitation of them. Out-of-specification local materials are normally available. If through appropriate modifications of the materials (adjusting the gradation or/and chemical treatment) or structural design (specifying thicker layers of base and/or hot mix) the use of the local materials can be permitted, the construction can be accelerated and significant monetary benefits can be realized. Under the current TxDOT specification (Item 247), a material can be considered out-of-specification (low-quality) for a variety of reasons such as inadequate gradation, inadequate plasticity and inadequate strength. In many cases, the local flexible base supplies miss the standard specifications by a small margin. Since the criteria set in Item 247 are experienced-based, some of the parameters used to classify a base may be less significant than others. In this report, guidelines and test protocols for the use of out-of-specification base materials in low volume roads are recommended on the basis of test results of ten materials from five TxDOT districts.
KW  - Base course (Pavements)
KW  - Guidelines
KW  - Local materials
KW  - Low volume roads
KW  - Specifications
KW  - Subbase (Pavements)
KW  - Test procedures
KW  - Texas
UR  - http://ctis.utep.edu/Reports/0-5562_1%20Report%20final.pdf
UR  - https://trid.trb.org/view/1429011
ER  - 

TY  - RPRT
AN  - 01469925
AU  - Trost, Steve
AU  - Strategic Solutions International, LLC
AU  - Oklahoma Department of Transportation
AU  - Federal Highway Administration
TI  - Measuring Air Void Characteristics of Oklahoma Air-Entrained Concrete using the Air Void Analyzer (AVA) / Analyzing AVA Sources of Error
PY  - 2009/01//Final Report
SP  - 56p
AB  - The conventional method for measuring the size distribution of air voids in concrete (ASTM C457) requires a technician with highly-specialized training and can only be performed on hardened concrete.  Waiting several days or even weeks for the concrete to harden enough to be tested does not provide the timely feedback needed for adequate quality control of the concrete’s air void structure.  To overcome this problem, a Danish company (Dansk Beton Teknik) developed a device to measure the size distribution of air in fresh concrete.  The device, known as the Air Void Analyzer (AVA), relies on Stoke’s law to measure bubble size distribution by timing the bubbles as they rise through a column of glycerol and water. The Oklahoma Department of Transportation contracted with Strategic Solutions International, LLC to use the AVA to quantify the air void characteristics of standard air-entrained concrete mixes in Oklahoma and to quantify the sources of error inherent in AVA measurements. The investigation included the following broad tasks: (1) Quantify the air void characteristics of standard mixes being used throughout the state of Oklahoma using the AVA; (2)  Quantify the sources of sampling and testing error inherent in the AVA test procedures and equipment; and (3) Develop and evaluate modifications to the AVA test procedures and/or equipment to improve the precision of the measurements. The investigation revealed the following: 75% of mixes tested had their average Spacing Factor above the 0.010-inch threshold and 65% of the mixes tested had their 95% Lower Confidence Limit above the 0.010-inch threshold. Pumping bridge concrete using a conventional pump truck increased the measured Spacing Factor by 0.0018 inches on average. The temperature of the liquids in the AVA riser column was found to be the most influential source of potential error.  In addition, temperature sensing and control capabilities of the current AVA equipment were found to be lacking, especially in light of the strong influence of temperature on the measured results.
KW  - Air entrained concrete
KW  - Air void analyzers
KW  - Air voids
KW  - Concrete
KW  - Confidence limits
KW  - Error analysis
KW  - Fresh concrete
KW  - Oklahoma
KW  - Spacing factor values
KW  - Temperature
UR  - http://www.okladot.state.ok.us/hqdiv/p-r-div/spr-rip/library/reports/fhwa-ok0803.pdf
UR  - https://trid.trb.org/view/1237858
ER  - 

TY  - RPRT
AN  - 01455174
AU  - Raoufi, Kambiz
AU  - Their, Tony
AU  - Weiss, W Jason
AU  - Olek, Jan
AU  - Nantung, Tommy E
AU  - Purdue University
AU  - Indiana Department of Transportation
AU  - Federal Highway Administration
TI  - Saw-Cutting Guidelines for Concrete Pavements: Examining the Requirements for Time and Depth of Saw-Cutting
PY  - 2009/01//Final Report
SP  - 809p
AB  - Joints are placed in Portland cement concrete pavements (PCCP) to control random cracking. These joints provide a weakened plane that enables a crack to form in a controlled manner, relieving residual stresses that develop when thermal, hygral, or hydration movements are resisted by sub grade and adjoining pavement. While the concept of creating a weakened plane through saw-cutting is straightforward, determining the time and depth of the saw-cut has proven to be complicated. The goal of this project was to reduce the risk for joint raveling and random cracking. Specifically, this project has focused on: developing a procedure for determining the appropriate saw-cutting time window for typical pavements constructed in the state of Indiana, determining the depth of the saw-cut that minimizes the risk of micro-cracking and random crack development, and developing tools and training materials for paving contractors and state inspectors that aid in implementing the findings of this study in concrete pavements. Toward this end the project was divided into three phases. The first phase of the project consisted of shadowing five pavement projects in Indiana. From these field investigations practical information was gained which was useful in developing the laboratory testing program. The second phase of this work involved in the development of the laboratory testing program. This phase in large part was involved in the development and commissioning of a new tensile wedge testing approach to determine the early age properties of concrete. Finally, finite element simulations were performed to simulate the early-age behavior of pavements constructed under a variety of saw-cutting sequences, environmental conditions. A strength reduction factor was computed based on the depth of the saw-cut. It was shown that the time of the saw-cut introduction needs to occur before the residual stress divided by the product of the strength reduction factor and tensile strength was equal to unity. It was also shown that shallower saw-cut depths were more prone to construction and material property variability. Recommendations are made to assist contractors in determining when saw-cuts are placed that can greatly improve field operations.
KW  - Concrete pavements
KW  - Cracking
KW  - Field studies
KW  - Finite element method
KW  - Indiana
KW  - Laboratory tests
KW  - Portland cement concrete
KW  - Saw-cut depth
KW  - Sawed joints
KW  - Stripping (Pavements)
KW  - Tension tests
KW  - Timing
UR  - http://dx.doi.org/10.5703/1288284313449
UR  - https://trid.trb.org/view/1218803
ER  - 

TY  - RPRT
AN  - 01454867
AU  - Ji, Yigong
AU  - Purdue University
AU  - Indiana Department of Transportation
AU  - Federal Highway Administration
TI  - Mechanistic Evaluation of Rubblized PCC Pavements
PY  - 2009/01//Final Report
SP  - 77p
AB  - This report presents a mechanistic approach and procedures for determining layer coefficients to characterize the in-situ behaviors of rubblized pavements. This procedure was developed based on the 1993 AASHTO Pavement Design Guide utilizing Falling Weight Deflectometer (FWD) testing and in-place simulation using back-calculation layer modulus. In order to evaluate the rubblized pavement systematically, twelve constructed pavement sections were extensively tested by FWD annually after construction. The FWD data was processed using the proposed mechanistic procedure. In addition, statistical analysis was conducted to compare the pavement structure parameters each year, including layer coefficient and in-situ resilient modulus using Analysis of Variance (ANOVA) and Z-tests. In the ANOVA, the comparison of the structure capacities derived from the field FWD tests with those from the mechanistic procedure supports the null hypothesis, which concluded there is no difference between the structural numbers from these two methods. Also, statistically, the layer coefficients in each year are significantly different. The in-situ resilient moduli for each year varied significantly. The results from Z-test show that for Hot Mixed Asphalt (HMA) layers, the layer coefficient confidence interval could be as high as 0.70 and also as low as 0.38. For the base layers, the layer coefficient confidence interval could be as high as 0.25 and also as low as 0.16. A layer coefficient of 0.42 is recommended for HMA and 0.22 for rubblized layer for the design of HMA overlay on rubblized PCC pavement.
KW  - Confidence intervals
KW  - Falling weight deflectometers
KW  - Hot mix asphalt
KW  - Layer coefficient (Pavements)
KW  - Mechanical analysis
KW  - Modulus of resilience
KW  - Overlays (Pavements)
KW  - Portland cement concrete
KW  - Rubblized concrete pavements
KW  - Simulation
UR  - http://dx.doi.org/10.5703/1288284314323
UR  - https://trid.trb.org/view/1218794
ER  - 

TY  - RPRT
AN  - 01454628
AU  - Graveen, Cole
AU  - Falker, Eric Max
AU  - Beaver, Micah
AU  - Neithalath, Narayanan
AU  - Weiss, W Jason
AU  - Olek, J
AU  - Nantung, Tommy Edward
AU  - Gallivan, Victor Lee
AU  - Purdue University
AU  - Indiana Department of Transportation
AU  - Federal Highway Administration
TI  - Performance Related Specifications (PRS) for Concrete Pavements in Indiana, Volume 2: Technical Report
PY  - 2009/01//Final Report
SP  - 462p
AB  - Performance-Related Specifications (PRS) are specifications that base pavement acceptance and pay adjustment on the projected performance and predicted life-cycle cost (LCC) for a specific pavement. PRS relate measurable quality characteristics with pavement performance through computer simulations that incorporate physical distress models. Previously, work at ERES consultants by Darter and co-workers developed prototype PRS for jointed plain portland cement concrete pavements (PCC) through Federal Highway Administration (FHWA) through a series of research projects. However, before this research program began, pavements have not been constructed using these specifications. This report describes the Indiana Department of Transportation’s (INDOT) experience with developing and implementing the first and second Level 1 PRS projects during the re-construction of a portion of I-465 east of Indianapolis and I-65 north of Clarksville, respectively. This report includes an overview of the concepts behind PRS, the process of developing a Level 1 PRS, lessons learned from implementing the first PRS in the construction of the pavement outside Indianapolis during the summer of 2000, lessons learned from implementing the second PRS in the construction of the pavement outside Clarksville during the summer of 2002, the use of non-destructive testing procedures to obtain measures of pavement quality, sample specifications, and conclusions and recommendations. In general, this specification was well received by both the agency and the contractors. It is believed that lessons learned on these projects will enable future modifications to the development of performance related specifications with the hope that these specifications will enable longer lasting, more cost effective pavements to be constructed.
KW  - Concrete pavements
KW  - Construction projects
KW  - Indiana
KW  - Indiana Department of Transportation
KW  - Lessons learned
KW  - Life cycle costing
KW  - Pavement performance
KW  - Performance based specifications
KW  - Quality assurance
KW  - Quality control
UR  - http://dx.doi.org/10.5703/1288284314214
UR  - https://trid.trb.org/view/1218829
ER  - 

TY  - RPRT
AN  - 01454627
AU  - Graveen, Cole
AU  - Falker, Eric Max
AU  - Beaver, Micah
AU  - Neithalath, Narayanan
AU  - Weiss, W Jason
AU  - Olek, J
AU  - Nantung, Tommy Edward
AU  - Gallivan, Victor Lee
AU  - Purdue University
AU  - Indiana Department of Transportation
AU  - Federal Highway Administration
TI  - Performance Related Specifications (PRS) for Concrete Pavements in Indiana, Volume 1: Executive Summary
PY  - 2009/01//Final Report
SP  - 72p
AB  - Performance-Related Specifications (PRS) are specifications that base pavement acceptance and pay adjustment on the projected performance and predicted life-cycle cost (LCC) for a specific pavement. PRS relate measurable quality characteristics with pavement performance through computer simulations that incorporate physical distress models. Previously, work at ERES consultants by Darter and co-workers developed prototype PRS for jointed plain portland cement concrete pavements (PCC) through Federal Highway Administration (FHWA) through a series of research projects. However, before this research program began, pavements have not been constructed using these specifications. This report describes the Indiana Department of Transportation’s (INDOT) experience with developing and implementing the first and second Level 1 PRS projects during the re-construction of a portion of I-465 east of Indianapolis and I-65 north of Clarksville, respectively. This report includes an overview of the concepts behind PRS, the process of developing a Level 1 PRS, lessons learned from implementing the first PRS in the construction of the pavement outside Indianapolis during the summer of 2000, lessons learned from implementing the second PRS in the construction of the pavement outside Clarksville during the summer of 2002, the use of non-destructive testing procedures to obtain measures of pavement quality, sample specifications, and conclusions and recommendations. In general, this specification was well received by both the agency and the contractors. It is believed that lessons learned on these projects will enable future modifications to the development of performance related specifications with the hope that these specifications will enable longer lasting, more cost effective pavements to be constructed.
KW  - Concrete pavements
KW  - Construction projects
KW  - Indiana
KW  - Indiana Department of Transportation
KW  - Lessons learned
KW  - Life cycle costing
KW  - Pavement performance
KW  - Performance based specifications
KW  - Quality assurance
KW  - Quality control
UR  - http://dx.doi.org/10.5703/1288284314213
UR  - https://trid.trb.org/view/1218828
ER  - 

TY  - RPRT
AN  - 01454626
AU  - Vargas, Rodrigo
AU  - Fricker, Jon D
AU  - Purdue University
AU  - Indiana Department of Transportation
AU  - Federal Highway Administration
TI  - Synthesis of Best Practices in Transportation Security, Volume II: Emergency Response
PY  - 2009/01//Final Report
SP  - 181p
AB  - Part I of the research focused on developing a methodology to identify and evaluate the most critical and vulnerable INDOT assets. This method aims at obtaining an index that reflects the vulnerability and criticality of an asset on the basis of multiple performance criteria. This methodology was tested on the seven INDOT districts. Because not all the factors that influence the vulnerability have the same weight, the analytical hierarchical process is used to obtain the weights for the criteria. Countermeasures are suggested as a part of the research to reduce the vulnerability of a given asset based on its relevant characteristics. The results included a list of top 25 critical assets in each district and a general methodology to combine different assets from districts to obtain a comprehensive statewide list. The research also includes recommendations to DOTs for identifying and assessing critical assets with respect to Vulnerability and Criticality. Part II of the research focused on developing a blueprint for an INDOT Emergency Operations Plan that will effectively integrate its emergency response practices with the larger national and statewide emergency management framework. The Incident Command System was confirmed to be a good standard practice among state DOTs, which can be applied to enhance INDOT’s emergency response procedures. Other practices reviewed included communications, the application of Intelligent Transportation Systems to emergency response, and the use of Decision Support Systems to support emergency operations. A version of the Incident Command System for adoption by INDOT Districts and Central Office was developed. Finally, a structure was proposed for the development of an INDOT EOP.
KW  - Best practices
KW  - Emergency management
KW  - Hazards and emergency operations
KW  - Incident Command System
KW  - Indiana
KW  - Indiana Department of Transportation
KW  - National Incident Management System (NIMS)
KW  - National security
KW  - State departments of transportation
KW  - Terrorism
UR  - http://dx.doi.org/10.5703/1288284314237
UR  - https://trid.trb.org/view/1218806
ER  - 

TY  - RPRT
AN  - 01454509
AU  - Hoyle, Tanner & Associates, Incorporated
AU  - New Hampshire Department of Transportation
AU  - Federal Highway Administration
TI  - Airport Master Plan and Preservation Study for Hampton Airfield
PY  - 2009/01//Final Report
SP  - 127p
AB  - The number of airports in the nation is on a decline. This reality has been documented by multiple sources, and is perhaps best illustrated by the number of public-use facilities nationwide that have closed over the past several years. In 2001, the Aircraft Owners and Pilots Association (AOPA) documented that the annual closure rate for public-use airports is one every two weeks. At its worst, the public-use airport annual closure rate averaged one a week. While most closures have been to privately-owned, public-use facilities, municipally-owned, public-use facilities are not immune to this trend. Regardless of ownership, nearly every one of these closures has been a general aviation facility. This has diminished the overall capacity of the nation’s system of airports during a time of increased air traffic activity and in time, will affect those facilities supporting commercial passenger service by leaving fewer airports to accommodate growing demand. While negative effects to commerce and both local and national economies are certain, airport closures also threaten to undermine the community access provided by general aviation. Understanding this threat to public-use airports, the New Hampshire Department of Transportation (NHDOT) Bureau of Aeronautics decided to analyze Hampton Airfield as a case study. This small but active airport has endured many of the same challenges as airports much larger. One of the most impressive differences is the fact that the private owners have done so with very limited outside financial support. For this reason, the various aspects of the Hampton Airfield’s operation have been evaluated and documented in this report. This information has been used to develop tools that are intended to help promote, preserve, and protect not only Hampton Airfield, but other public-use airports facing similar challenges in New Hampshire and throughout the country. An Airport Preservation Tool Box was developed concurrently with this study and is intended primarily as a resource for airport stakeholders and proponents. The toolbox was published in 2008 and can be accessed through the NHDOT, Bureau of Aeronautics’ website.
KW  - Air traffic
KW  - Airport access
KW  - Airport closure
KW  - Airport operations
KW  - Airport planning
KW  - New Hampshire
KW  - Preservation
KW  - Private airports
UR  - http://www.nh.gov/dot/org/projectdevelopment/materials/research/projects/documents/FHWA-NH-RD-14282L.pdf
UR  - https://trid.trb.org/view/1223069
ER  - 

TY  - RPRT
AN  - 01454407
AU  - Barde, Vinit
AU  - Radlinska, Aleksandra
AU  - Cohen, Menashi
AU  - Weiss, W Jason
AU  - Purdue University
AU  - Indiana Department of Transportation
AU  - Federal Highway Administration
TI  - Relating Material Properties to Exposure Conditions for Predicting Service Life in Concrete Bridge Decks in Indiana
PY  - 2009/01//Final Report
SP  - 219p
AB  - Bridges in the United States (US) are deteriorating at an alarming rate. It has been estimated that transportation agencies across the US invest more than 5 billion dollars on concrete bridge repair and renovation annually. To meet the needs of transportation industry, high performance concrete (HPC) has been developed for the construction of bridges. However, to date, the link between material properties and field performance is not completely established. Goodspeed et al. [1996} defined the performance of concrete using four material parameters that describe durability and four material parameters that describe mechanical properties. It should be noted however that material properties alone cannot entirely define field performance. Rather some consideration is needed to quantify the conditions to which the concrete will be exposed. The exposure conditions vary based on the geographical location. This work relates material properties with the exposure conditions typical of those in the state of Indiana to estimate the performance of concrete bridge decks. The exposure conditions in the state of Indiana have been assessed. Specifically, temperature, rainfall, wetting events, freeze thaw cycles, and relative humidity have been classified. To assess the variation in these parameters across the state, contour maps were developed using information from cities in the state of Indiana as well as cities in surrounding states. The eight parameters suggested by Goodspeed et al. [1996] have been reviewed. Three key distresses behavior (chloride ingress, freezing and thawing, and shrinkage cracking) have been investigated in depth. Relationships have been developed to relate measured material properties (from the results of AASHTO/ASTM tests) with the predicted performance of the concrete structure under different exposure condition. First, a model is presented that relates the results of Rapid Chloride Permeability Test (RCPT) with the anticipated service life of bridge deck against corrosion due to chloride ingress. Second, a model is presented that relates results of sorptivity, porosity, and critical saturation with the anticipated service life of concrete exposed to freezing and thawing. Third, a model is presented that relates the shrinkage of concrete with the potential for premature cracking. The results of each of the models have been presented for conditions that are typical of the state of Indiana.
KW  - Bridge decks
KW  - Cracking
KW  - Deterioration
KW  - High performance concrete
KW  - Indiana
KW  - Material properties
KW  - Rapid Chloride Permeability Test
KW  - Service life
UR  - http://dx.doi.org/10.5703/1288284313444
UR  - https://trid.trb.org/view/1218801
ER  - 

TY  - JOUR
AN  - 01383842
JO  - Public Roads
PB  - Federal Highway Administration
AU  - Graybeal, B A
TI  - UHPC making strides [concrete]
PY  - 2009/01
VL  - 72
IS  - 4
SP  - 17-21
KW  - Concrete
KW  - Concrete
KW  - Concrete bridge
KW  - Concrete bridges
KW  - Concrete pavement
KW  - Concrete pavements
KW  - Materials technology (asphalt/bitumen/concrete)
KW  - Performance
KW  - Performance
KW  - Usa
UR  - http://www.fhwa.dot.gov/publications/publicroads/09janfeb/03.cfm
UR  - https://trid.trb.org/view/1151606
ER  - 

TY  - JOUR
AN  - 01383841
JO  - Public Roads
PB  - Federal Highway Administration
AU  - Kar, K
AU  - Weeks, R S
TI  - The sound of safety [rumble strips]
PY  - 2009/01
VL  - 72
IS  - 4
SP  - 10-6
KW  - Accident countermeasure
KW  - Center lines
KW  - Centre line
KW  - Highway safety
KW  - Road safety
KW  - Road safety (engineering and vehicles)
KW  - Rumble strip
KW  - Rumble strips
KW  - Rural highways
KW  - Rural road
KW  - Traffic safety
KW  - Two lane highways
KW  - Two lane road
KW  - Usa
UR  - http://www.fhwa.dot.gov/publications/publicroads/09janfeb/02.cfm
UR  - https://trid.trb.org/view/1151605
ER  - 

TY  - RPRT
AN  - 01343315
AU  - Brody, Susan
AU  - Margerum, Richard D
AU  - Oregon Department of Transportation
AU  - Federal Highway Administration
TI  - Oregon’s ACTs, Cross-Jurisdictional Collaboration, and Improved Transportation Planning
PY  - 2009/01//Final Report
SP  - 298p
AB  - The Oregon Transportation Commission (OTC) created Area Commissions on Transportation (ACTs) to improve coordination, help prioritize infrastructure investment, and provide input on statewide transportation issues. The structure of the ACTs is designed to provide a cross-section of input from the state, regional, local, private, and community sectors. A research project was initiated to: assess the role and experiences of ACTs, research comparative approaches in the state and nationally, and develop and assess options for improving coordination and increasing effectiveness. This study used interviews, an on-line survey, case studies from Oregon and comparative studies from three other states to assess ACTs and identify options. The findings reveal that ACTs have improved the state prioritization process and increased communication across the parties involved, but they face challenges in relation to cross-regional coordination, strategic investment decisions, and regional problems such as urban travelsheds. The study highlights a range of options for improving ACT functioning under its current structure, and more significant options that would require policy and structural changes.
KW  - Case studies
KW  - Communication
KW  - Coordination
KW  - Decision making
KW  - Investments
KW  - Mobility
KW  - Oregon
KW  - Planning commissions
KW  - Regional planning
KW  - Strategic planning
KW  - Transportation corridors
KW  - Transportation planning
KW  - Transportation policy
UR  - http://www.oregon.gov/ODOT/TD/TP_RES/ResearchReports/ACT_Report.pdf
UR  - https://trid.trb.org/view/1105134
ER  - 

TY  - RPRT
AN  - 01163056
AU  - Sheckler, Ross D
AU  - Calmar Holdings and Telematics Services LLC
AU  - New York State Energy Research and Development Authority
AU  - New York State Department of Transportation
AU  - Federal Highway Administration
TI  - Universal Real-Time Highway Information System Development Program - Final Report On Phase II
PY  - 2009/01//Final Report
SP  - 31p
AB  - The final phase of a two phase effort was undertaken to establish data forms and communication protocols to provide the New York State Department of Transportation (NYSDOT) access to the unique highway data resource known as the Highway Visibility System (HIVIS), developed in the initial phase of the program. Computer processes were established to calculate basic performance metrics. Processes and web applications were developed to automate streams of a variety of forms of highway data into NYSDOT servers. Further processes were developed to rapidly form and post web applications giving clients such as NYSDOT graphical access to traffic metrics displayed in a GIS environment. The capabilities established under the two phases of the program were further leveraged to provide support to FHWA programs on the US/Mexican border.
KW  - Geographic information systems
KW  - Intelligent transportation systems
KW  - Metrics (Quantitative assessment)
KW  - Real time information
KW  - Traffic data
UR  - http://www.nysdot.gov/divisions/engineering/technical-services/trans-r-and-d-repository/C-05-05%20HIVIS%20Phase%20II%20Final%20Report%20-%20January2009.pdf
UR  - https://trid.trb.org/view/923584
ER  - 

TY  - RPRT
AN  - 01158465
AU  - Garcia-Monzon, Hector
AU  - Phelan, Randall Scott
AU  - Senadheera, Sanjaya
AU  - Texas Tech University, Lubbock
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Effects of Wet Mat Curing Time and Earlier Loading on Long-Term Durability of Bridge Decks: Compressive Strength, Maturity and Strength Durability Index (SDI)
PY  - 2009/01//Final Report
SP  - 176p
AB  - There is increasing pressure from owners, contractors, and the public to open bridge decks sooner to full traffic loads. As a result, a set of criteria or guidelines is needed to determine when concrete bridge decks can safely be opened. Today, current practice allows many bridge decks and concrete pavements to be opened to traffic once a desired compressive strength is achieved from a representative field-cast test cylinder. Though generally untrue, many believe that this strength value serves as a measure of the durability of the placed concrete. In a collaborative research effort between Texas Department of Transportation and researchers at Texas Tech University, studies were undertaken to collect research data that could potentially lead to the development of new guidelines as to when bridge decks can be open to (a) construction traffic and (b) full traffic without sacrificing concrete durability. This report presents detailed findings of two research thrusts: compressive strength and maturity curves commonly used on bridge deck concrete mixes and comparative assessment of the effectiveness of three curing methods that led to the development of a framework for a Strength-Durability Index (SDI).
KW  - Bridge decks
KW  - Compressive strength
KW  - Concrete curing
KW  - Concrete maturity
KW  - Durability
KW  - Guidelines
KW  - Opening to traffic
KW  - Wet mat curing
UR  - http://www.depts.ttu.edu/techmrtweb/reports/complete_reports/0-2116-4A.pdf
UR  - https://trid.trb.org/view/919252
ER  - 

TY  - RPRT
AN  - 01156897
AU  - Gross, Frank
AU  - Nabors, Dan
AU  - Eck, Ronald
AU  - Hood, Mark
AU  - Vanasse Hangen Brustlin, Incorporated
AU  - Federal Highway Administration
TI  - Safety Circuit Rider Programs Best Practices Guide
PY  - 2009/01//Final Report
SP  - 115p
AB  - This Guide is intended to provide state departments of transportation (DOT) and LTAP/TTAP centers with an easy-to-use resource for implementing or enhancing a Safety Circuit Rider (SCR) program. The Guide includes common characteristics of existing SCR programs and the safety circuit riders. The Guide also includes information on the typical duties and services provided by SCR programs, lessons learned by existing programs, and evidence of the effectiveness of existing SCR programs.
KW  - Best practices
KW  - Highway safety
KW  - Local government agencies
KW  - Local Technical Assistance Program
KW  - Safety Circuit Rider
KW  - Technology transfer
KW  - Transportation departments
UR  - http://safety.fhwa.dot.gov/local_rural/training/fhwasa09019/fhwasa09019.pdf
UR  - https://trid.trb.org/view/916467
ER  - 

TY  - RPRT
AN  - 01154177
AU  - Senadheera, Sanjaya P
AU  - Phelan, Randall S
AU  - Amarasiri, Aruna
AU  - Aamidala, Hari
AU  - Texas Tech University, Lubbock
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Effects of Wet Mat Curing Time and Earlier Loading on Long-Term Durability of Bridge Decks: Fracture, Flexural Strength and Shrinkage
PY  - 2009/01//Final Report
SP  - 141p
AB  - There is increasing pressure from owners, contractors, and the public to open bridge decks sooner to full traffic loads. As a result, a set of criteria or guidelines is needed to determine when concrete bridge decks can safely be opened. Today, current practice allows many bridge decks and concrete pavements to be opened to traffic once a desired compressive strength is achieved from a representative field-cast test cylinder. Though generally untrue, many believe that this strength value serves as a measure of the durability of the placed concrete. In a collaborative research effort between Texas Department of Transportation and researchers at Texas Tech University, studies were undertaken to collect research data that could potentially lead to the development of new guidelines as to when bridge decks can be open to (a) construction traffic and (b) full traffic without sacrificing concrete durability. This report presents detailed findings of three tests – fracture, flexural strength and shrinkage.
KW  - Bridge decks
KW  - Curing time
KW  - Durability
KW  - Flexural strength
KW  - Fracture tests
KW  - Guidelines
KW  - Laboratory tests
KW  - Opening to traffic
KW  - Shrinkage
UR  - http://www.depts.ttu.edu/techmrtweb/reports/complete_reports/2116-R4B_final.pdf
UR  - https://trid.trb.org/view/915757
ER  - 

TY  - RPRT
AN  - 01143778
AU  - Zhou, Fujie
AU  - Fernando, Emmanuel G
AU  - Scullion, Tom
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Laboratory and Field Procedures Used to Characterize Materials
PY  - 2009/01//Product
SP  - 44p
AB  - The objective of Texas Department of Transportation (TxDOT) Project 0-5798 is to develop the framework for the development and implementation of the next level of Mechanistic-Empirical Pavement Design Guide (MEPDG) for TxDOT (Tex-ME). A very important aspect of this project is to identify laboratory testing procedures, which can be used to provide TxDOT with the material properties needed as inputs to both the pavement response and performance prediction models. This product documents the laboratory and field procedures used to characterize materials; it includes the research team’s recommendations for Level 1 tests needed to characterize the rutting potential of asphalt, granular, and soil layers and also the cracking potential of asphalt layers. These procedures should be considered as drafts at this time, they will continue to be refined for the duration of this study, and the final versions will be included in the project final report.
KW  - Fatigue cracking
KW  - Field tests
KW  - Flexible pavements
KW  - Laboratory tests
KW  - Mechanistic-Empirical Pavement Design Guide
KW  - Rutting
KW  - Test procedures
KW  - Texas
UR  - http://tti.tamu.edu/documents/0-5798-P1.pdf
UR  - http://ntl.bts.gov/lib/31000/31300/31309/0-5798-P1.pdf
UR  - https://trid.trb.org/view/904206
ER  - 

TY  - RPRT
AN  - 01142393
AU  - Menches, Cindy L
AU  - Caldas, Carlos H
AU  - O'Connor, James T
AU  - Cohen, Chelsea A
AU  - University of Texas, Austin
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - TxDOT Synthesis of the Construction Inspection Workload Reduction Strategies
PY  - 2009/01
SP  - 87p
AB  - The Texas Department of Transportation (TxDOT) faces significant workforce challenges, particularly in the districts, where the testing and inspection workload is increasing but the workforce is decreasing. As a result of these workforce challenges, TxDOT is looking for more effective ways to manage their testing, inspection, and measurement workload. They are looking to other DOTs from which they believe much can be learned. Other states are facing similar workforce challenges and have taken actions to implement procedures to reduce their construction inspection workload. Such procedures include increasing contractor testing and inspection responsibilities, outsourcing testing and inspection to third parties, creating extensive training and certification programs, and modifying their specifications to minimize time intensive testing and measurement. Accordingly, there is a need to summarize the best practices from those state DOTs that have already instituted successful programs to reduce the QC/QA workload that could potentially aid TxDOT in addressing their specific workload challenges. This project summarized TxDOT’s current workload challenges, identified successful workload reduction strategies that have been implemented in other state DOTs, compared TxDOT’s challenges and practices to the other states’ challenges and practices, and lastly prioritized the workload reduction strategies implemented in other states that could be applied to manage TxDOT’s workforce challenges.
KW  - Best practices
KW  - Construction
KW  - Inspection
KW  - Labor force
KW  - Personnel shortages
KW  - Quality assurance
KW  - Quality control
KW  - State departments of transportation
KW  - Strategic planning
KW  - Testing
KW  - Texas Department of Transportation
KW  - Workload
UR  - http://www.utexas.edu/research/ctr/pdf_reports/0_5799_P1.pdf
UR  - http://ntl.bts.gov/lib/31000/31100/31199/0_5799_P1.pdf
UR  - https://trid.trb.org/view/902779
ER  - 

TY  - RPRT
AN  - 01142060
AU  - Birenbaum, Ingrid
AU  - Creel, Charles
AU  - Wegmann, Sally G
AU  - PBS&J
AU  - Federal Highway Administration
TI  - Traffic Control Concepts for Incident Clearance
PY  - 2009/01//Technical Report
SP  - 54p
AB  - This document discusses various aspects of traffic control for incidents with the focus on the traffic control roles and responsibilities of the responders as well as the safety of the responders and the motoring public. It also recognizes that active traffic management is necessary to meet the fluctuating needs of the scene and to minimize clearance and recovery time. An overview of popular state laws and policies enacted to support safe, quick clearance is provided. The roles/responsibilities of the various categories of responders are addressed. Available traffic control devices are discussed. There is also focus on the affects on traffic control created by the dynamic nature of incident clearance. Highlights of some “best practices” to enhance traffic control implementation are included.
KW  - Clearance time (Traffic incidents)
KW  - Highway traffic control
KW  - Incident management
KW  - Traffic incidents
UR  - http://ntl.bts.gov/lib/30000/30800/30830/fhwahop08057.pdf
UR  - https://trid.trb.org/view/902400
ER  - 

TY  - RPRT
AN  - 01141701
AU  - Info Tech, Incorporated
AU  - Connecticut Department of Transportation
AU  - Federal Highway Administration
TI  - Requirements Analysis Report for Trns·port Estimation, Preconstruction, Construction, Decision Support and Electronic Bidding Systems
PY  - 2009/01//Final Report
SP  - 205p
AB  - Info Tech conducted an on-site visit at the Connecticut Department of Transportation (ConnDOT) in Newington from October 27-31, 2008.  The purpose of the visit was to conduct an analysis of ConnDOT's processes and to review the operations and business systems currently in place at ConnDOT relative to the proposed systems.  This report outlines the tasks and requirements for implementation of the selected estimation, pre-construction, construction, electronic bidding system, and decision support products.  This report includes projected costs and schedules for Info Tech services to assist ConnDOT with the implementation activities.
KW  - Connecticut Department of Transportation
KW  - Construction
KW  - Decision support systems
KW  - Electronic bidding
KW  - Information systems
KW  - Preconstruction
UR  - http://www.ct.gov/dot/LIB/dot/documents/dresearch/ct-2245-F-09-1.pdf
UR  - https://trid.trb.org/view/902395
ER  - 

TY  - RPRT
AN  - 01141677
AU  - Folliard, Kevin J
AU  - Pesek, Phillip
AU  - Kallivokas, Loukas F
AU  - Riding, Kyle A
AU  - Schindler, Anton Karel
AU  - University of Texas, Austin
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Phase 1 Report on the Development of Predictive Model for Bridge Deck Cracking and Strength Development
PY  - 2009/01//Technical Report
SP  - 60p
AB  - Early-age cracking, typically caused by drying shrinkage (and often coupled with autogenous and thermal shrinkage), can have several detrimental effects on long-term behavior and durability. Cracking can also provide ingress of water that can drive chemical reactions, such as alkali-silica reaction (ASR) and sulfate attack. Because of the problems associated with cracking observed in bridge decks, and the impact of early-age cracking on long-term performance and durability, it is imperative that bridge decks be constructed with minimal early-age cracking and that they exhibit satisfactory long-term performance and durability. To achieve these goals for bridges in the state of Texas, a research team has been assembled that possesses significant expertise and background in cement chemistry, concrete materials and durability, structural performance, computational mechanics (finite difference/element), bridge deck construction and maintenance, monitoring of behavior of field structures, and the development of test methods and specifications aimed at practical implementation by state highway departments. This report describes a laboratory- and field-based research program aimed at developing a bridge deck cracking model that will ultimately be integrated into ConcreteWorks, a suite of software programs developed for the Texas Department of Transportation by this same research team.
KW  - Bridge decks
KW  - Cracking
KW  - Durability
KW  - Early age cracking
KW  - Field tests
KW  - Laboratory tests
KW  - Long term performance
KW  - Mathematical models
KW  - Texas
UR  - http://www.utexas.edu/research/ctr/pdf_reports/0_6332_1.pdf
UR  - http://ntl.bts.gov/lib/31000/31300/31301/0_6332_1.pdf
UR  - https://trid.trb.org/view/902178
ER  - 

TY  - RPRT
AN  - 01140586
AU  - Subramaniam, Kolluru V
AU  - Agrawal, Anil K
AU  - City College of New York of the City University of New York
AU  - New York State Department of Transportation
AU  - Federal Highway Administration
TI  - Concrete Deck Material Properties
PY  - 2009/01//Final Report
SP  - 120p
AB  - The two-fold focus of this study was (a) to develop an understanding of the mechanisms responsible for causing cracking in the concrete; and (b) to study the influence of the local materials on the performance of New York State Department of Transportation's (NYSDOT’s) high performance (HP) concrete mixture. Recommendations for minimizing the premature cracking in HP concrete decks related to restrained volumetric contraction are developed from the results of this investigation. It is important to reduce the total temperature rise and the temperature gradient across the steel girder to minimize the level of tensile stress in concrete in the first few days after casting, while the concrete goes through the heating and cooling produced by hydration heat. The local materials for use in HP concrete should be carefully evaluated. The type of coarse aggregate used in the mixture produces significant differences in the strength and elastic modulus of concrete. Differences in cementitious material contribute to significant differences in autogenous and drying shrinkage. Recommendations pertaining to cementitious materials are: (a) If silica fume is used, it should only to be added separately to the mix, unless the reactivity of blended silica fume is established and found comparable to silica fume addition; (b) Only the use of Type I/II or Type II cement should be permitted; and (c) When ground granulated blast furnace slag is used, it should be evaluated to ensure that it does not provide high early reactivity.
KW  - Bridge decks
KW  - Coarse aggregates
KW  - Cracking
KW  - Granulated slag
KW  - Heat of hydration
KW  - High performance concrete
KW  - Modulus of elasticity
KW  - Shrinkage
KW  - Silica fume
KW  - Strength of materials
KW  - Temperature gradients
KW  - Tensile stress
UR  - http://www.nysdot.gov/divisions/engineering/technical-services/trans-r-and-d-repository/C-02-03_FINAL-REPORT.pdf
UR  - http://ntl.bts.gov/lib/31000/31100/31188/C-02-03_FINAL-REPORT.pdf
UR  - https://trid.trb.org/view/900949
ER  - 

TY  - RPRT
AN  - 01140582
AU  - Federal Highway Administration
TI  - Non-Toll Pricing: A Primer
PY  - 2009/01
SP  - 20p
AB  - Most forms of congestion pricing involve the levying of direct tolls on highway users in one form or another. This report focuses on forms of congestion pricing that do not involve tolls but that are still aimed at creating more efficient pricing mechanisms for automobile use. The contents of this report are as follows: Introduction to Non-Toll Pricing; Overview of Mileage-Based Pricing Strategies: PAYDAYS (pay-as-you-drive-and-you-save) Car Insurance and Car Sharing; Overview of Parking and Access Pricing Strategies: Parking Cash-Out, Variably Priced Metered Parking, Pricing of Off-Street Parking, and Variable Port Access Charges for Trucks; and Making Non-Toll Pricing Happen: Individual and Corporate Actions and Government Incentives.
KW  - Automobile travel
KW  - Congestion pricing
KW  - Implementation
KW  - Incentives
KW  - Mileage-based user fees
KW  - Parking fees
KW  - Pay-as-you-drive automobile insurance
KW  - Port access pricing
KW  - Vehicle sharing
UR  - http://ntl.bts.gov/lib/31000/31000/31042/fhwahop08044.pdf
UR  - https://trid.trb.org/view/900993
ER  - 

TY  - RPRT
AN  - 01138521
AU  - Richardson, David N
AU  - Petry, Thomas M
AU  - Ge, Louis
AU  - Han, Yuh-Puu
AU  - Lusher, Steven Michael
AU  - Missouri University of Science and Technology, Rolla
AU  - Missouri Department of Transportation
AU  - Federal Highway Administration
TI  - Resilient Moduli of Typical Missouri Soils and Unbound Granular Base Materials
PY  - 2009/01//Final Report
SP  - 246p
AB  - The objective of this project was to determine the resilient moduli (M sub r) for common Missouri subgrade soils and typical unbound granular base materials in accordance with the AASHTO T 307 test method. The results allow Missouri Department of Transportation (MoDOT) pavement engineers to calibrate software included with the National Cooperative Highway Research Program Project 1-37A Mechanistic-Empirical Pavement Design Guide according to Missouri’s conditions and materials. The test results included M sub r data from 27 common subgrade soils out of the 99 Missouri soil associations and from 5 unbound granular base materials. The subgrade soils, selected and provided by MoDOT, were tested at their optimum water content [as determined from AASHTO T 99 testing (AASHTO, 2001)] and at an elevated water content. The 5 unbound granular base materials, again selected and provided by MoDOT and representing a typical range in geologic source, were tested at 2 different gradations (typical as-delivered percent minus #200 sieve size and at an elevated amount of fines). All testing included 3 replications for all materials. Data are provided in the form of tables and graphs. As a part of the granular base material M sub r specimen preparation deliberation, maximum dry density (MDD) and optimum moisture content (OMC) were determined for each of the 10 material/gradation combinations. The M sub r testing program results indicate that both the material source and fines content are highly significant in the level of attained M sub r. In regard to material source, the range between the highest and lowest M sub r values was more than two-fold. Also, 2 of the 5 aggregate sources suffered a 15 to 20% loss in M sub r with the addition of 5% fines.
KW  - AASHTO T 307
KW  - Dry density
KW  - Fines (Materials)
KW  - Granular bases
KW  - Missouri
KW  - Modulus of resilience
KW  - Moisture content
KW  - Soils
KW  - Subgrade (Pavements)
UR  - http://library.modot.mo.gov/RDT/reports/Ri06001/or09016.pdf
UR  - http://ntl.bts.gov/lib/31000/31300/31302/or09016.pdf
UR  - https://trid.trb.org/view/898814
ER  - 

TY  - RPRT
AN  - 01137213
AU  - Horwatich, Judy A
AU  - Bannerman, Roger T
AU  - U.S. Geological Survey
AU  - Wisconsin Department of Natural Resources
AU  - Wisconsin Department of Transportation
AU  - Federal Highway Administration
TI  - Pollutant Loading to Stormwater Runoff from Highways: Impact of a Highway Sweeping Program-Phase II, Madison, Wisconsin
PY  - 2009/01//Final Report
SP  - 136p
AB  - This report describes the methods used to collect stormwater runoff and evaluate a street sweeping program on U.S. Highway 151 in Madison, Wisconsin. The study was a cooperative effort among the Wisconsin Department of Transportation (WisDOT), U.S. Geological Survey, and Wisconsin Department of Natural Resources. In a swept highway section, samples were collected to determine street dirt yields before and after a cleaning from either a vacuum-assisted or a mechanical-broom sweeper machine. Sweeping frequencies of twice per day, once per week, and once every two weeks were used during the study. On an unswept highway section of the study, street dirt yields are presented as weekly collections, and before and after runoff events. Water quality concentrations and flows are also presented for the unswept highway section. Average concentrations of selected contaminants are compared to concentrations measured in other studies of highway runoff. Changes in street dirt yields before and after sweeping and runoff events will be used to calibrate and verify the WinSLAMM model. By modifying the accumulation, event wash off, and street cleaning productivity equations in the model with the data from this study, WisDOT will be able to evaluate street sweeping programs on urban highways with curbs. A sweeping program is proposed as a best management practice to attain some of the 40% reduction in total suspended solids (TSS) prescribed in Wisconsin stormwater regulations. This report includes estimated daily-accumulation rates of street-dirt yields and percent of street-dirt washed off during a runoff event. Seasonal estimates of street-dirt yield reductions due to street sweeping are also presented. Concentrations and flows measured in the unswept highway section were used to calculate contaminant loads for each event. Loads were calculated for particulate and dissolved solids, inorganic compounds and trace metals. Sediment loads measured with a water quality sampler are augmented with the weights of sediment captured in a bedload sampler. Loads will be used to calibrate and verify the contaminant loads predicted at a highway outfall by the model by altering concentration files from this study.
KW  - Best practices
KW  - Contaminants
KW  - Inorganic compounds
KW  - Madison (Wisconsin)
KW  - Metals
KW  - Particulates
KW  - Pollutants
KW  - Runoff
KW  - Sediments
KW  - Street cleaning
KW  - Total suspended solids
KW  - Urban highways
KW  - Water quality
UR  - http://wisdotresearch.wi.gov/wp-content/uploads/04-04sweeperstudy-f1.pdf
UR  - http://ntl.bts.gov/lib/35000/35500/35517/04-04sweeperstudy-f.pdf
UR  - https://trid.trb.org/view/897499
ER  - 

TY  - RPRT
AN  - 01134787
AU  - Federal Highway Administration
TI  - Grand Parkway (State Highway 99) segment G from Interstate Highway (IH) 45 to US 59 : environmental impact statement
PY  - 2009/01//Volumes held: Draft(3v), Final(4v)
KW  - Environmental impact statements
KW  - Texas
UR  - https://trid.trb.org/view/895547
ER  - 

TY  - RPRT
AN  - 01132440
AU  - Folliard, Kevin J
AU  - Hover, Kenneth C
AU  - Harris, Nathan
AU  - Ley, M Tyler
AU  - Naranjo, Andy
AU  - University of Texas, Austin
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Effects of Texas Fly Ash on Air-Entrainment in Concrete: Comprehensive Report
PY  - 2009/01//Technical Report
SP  - 577p
AB  - This report summarizes a comprehensive joint research project, funded by the Texas Department of Transportation (TxDOT) and performed by researchers at the University of Texas at Austin and Cornell University. This three-volume report is perhaps the most complete study to date on this topic. It is expected that the key findings from this study will be of benefit to practitioners in Texas and beyond. The report includes the following three volumes:  Volume 1 (Chapters 2–9)—“Evaluating the Influence of Fly Ash on Air-Entrained Concrete,” based on Nathan Harris’s Ph.D. Dissertation at Cornell University (2007); Volume 2 (Chapters 10–17)—“The Effects of Fly Ash on the Ability to Entrain and Stabilize Air in Concrete,” Tyler Ley’s Ph.D. Dissertation at the University of Texas at Austin (2007); and Volume 3 (Chapters 18–24)—“Clustering of Air Voids around Aggregates in Air- Entrained Concrete,” Andrew Naranjo’s M.S. Thesis at the University of Texas at Austin (2007). A brief concluding chapter is presented that summarizes the key findings and recommendations and identifies future research needs.
KW  - Air entrained concrete
KW  - Air voids
KW  - Fly ash
UR  - http://www.utexas.edu/research/ctr/pdf_reports/0_5207_1.pdf
UR  - https://trid.trb.org/view/892182
ER  - 

TY  - RPRT
AN  - 01131367
AU  - Liu, Wenting
AU  - Scullion, Tom
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - PAVECHECK: Training Material: Updated User’s Manual Including GPS
PY  - 2009/01//Product
SP  - 50p
AB  - PAVECHECK is a software package used to integrate nondestructive test data from various testing systems to provide the pavement engineer with a comprehensive evaluation of both surface and subsurface conditions. This User’s Manual is intended to demonstrate how to load data into PAVECHECK and how to use the many functions available within the system. The PAVECHECK software is provided on a CD that accompanies this report. The PAVECHECK executable module will load the program and two folders containing test data into the default C:\PAVECHECK\ directory. The US77 folder is intended to represent a typical new data set that will need to be input into PAVECHECK. These data are used to demonstrate how to create a project file and view data. The ANNEX folder contains an already existing comprehensive project file that includes falling weight deflectometer (FWD) data.
KW  - Computer program documentation
KW  - Data integration
KW  - Global Positioning System
KW  - Information processing
KW  - PAVECHECK (Computer program)
UR  - http://tti.tamu.edu/documents/5-4495-01-P2.pdf
UR  - https://trid.trb.org/view/891666
ER  - 

TY  - RPRT
AN  - 01130734
AU  - Garfield, Scott M
AU  - Varathungarajan, David A
AU  - Wright, Stephen G
AU  - University of Texas, Austin
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Improved Correlation between Texas Cone Penetrometer Blow Count and Undrained Shear Strength of Soft Clays
PY  - 2009/01//Technical Report
SP  - 139p
AB  - The objective of this project was to develop an improved correlation between Texas Cone Penetrometer (TCP) blow count and undrained shear strength for soft, clay soils in the upper approximately 30 ft of the ground. Subsurface explorations were carried out by Tolunay-Wong Engineers, Inc. (TWEI) at six sites in the Texas Gulf Coast region where soft soils were expected to exist to obtain the data necessary to establish the improved correlation. A series of borings was made at each site with TCP tests, conventional (“Dutch”) piezocone penetration tests, thin-walled tube sampling, and vane shear tests. Laboratory testing was subsequently performed at the University of Texas at Austin on the thin-walled tube samples obtained in the field. The results of these field and laboratory tests were used to develop average, lower- and upper-bound undrained shear strength profiles for each of the sites (Varathungarajan, 2008). The data were used to evaluate existing correlations between TCP blow count and undrained shear strength as well as to establish an improved correlation. The following improved correlation was proposed: S sub u = 300 + 60N, where S sub u is undrained shear strength in lb per sq ft (psf) and N is the TCP blow count. To evaluate the improved correlation, bearing capacity analyses were performed using the computer software UTEXAS4 (Wright, 1999) to compute factors of safety for undrained strength profiles developed using the improved correlation as well as for the undrained strength profiles developed by Varathungarajan (2008). Factors of safety computed using undrained shear strengths based on the improved correlation generally showed good agreement with the factors of safety determined using the strength profiles developed by Varathungarajan (2008). The improved correlation is recommended over the existing correlations and is intended primarily for soft, shallow (less than 30 ft) clays with undrained shear strengths of 1200 psf (approximately 0.47 atmosphere) or less (TCP blow counts of 15 or less). Accordingly, this correlation should be used cautiously. Significant benefits can also be realized by performing more extensive field and laboratory testing, rather than relying on simple, approximate TCP correlations.
KW  - Cone penetrometers
KW  - Correlation analysis
KW  - Field tests
KW  - Geotechnical engineering
KW  - Laboratory tests
KW  - Safety factors
KW  - Soft clays
KW  - Soil penetration test
KW  - Undrained shear strength
UR  - http://www.utexas.edu/research/ctr/pdf_reports/0_5824_1.pdf
UR  - https://trid.trb.org/view/891050
ER  - 

TY  - RPRT
AN  - 01130689
AU  - Mani, Akshay
AU  - Fischer, Michael J
AU  - Cambridge Systematics, Incorporated
AU  - Federal Highway Administration
TI  - FHWA Operations Support - Port Peak Pricing Program Evaluation
PY  - 2009/01//Final Report
SP  - 93p
AB  - This report evaluates the applicability, Federal policy implications, and possible public and private sector rules related to peak pricing strategies at ports and intermodal facilities in the U.S.  A number of ports and intermodal terminals are considering peak-period truck pricing strategies modeled on the Ports of Long Beach and Los Angeles PierPASS OffPeak Program to:  1) reduce peak-period congestion; 2) improve terminal operating efficiencies; 3) reduce truck wait and idle times; 4) improve air quality; and 5) lessen community impacts.  This report presents a detailed discussion of the results from this evaluation.
KW  - Air quality
KW  - Congestion pricing
KW  - Environmental impacts
KW  - Freight terminals
KW  - Freight transportation
KW  - Idle time
KW  - Intermodal terminals
KW  - Operating efficiency
KW  - Peak periods
KW  - PierPASS OffPeak Program
KW  - Port congestion
KW  - Port operations
KW  - Ports
KW  - Terminal operations
KW  - Trucking
KW  - United States
KW  - Waiting time
UR  - http://www.ops.fhwa.dot.gov/publications/fhwahop09014/fhwahop09014.pdf
UR  - https://trid.trb.org/view/891014
ER  - 

TY  - RPRT
AN  - 01130679
AU  - Charbeneau, Randall J
AU  - Klenzendorf, Brandon
AU  - Barrett, Michael E
AU  - University of Texas, Austin
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Hydraulic Performance of Bridge Rails
PY  - 2009/01//Technical Report
SP  - 158p
AB  - This research program addresses issues associated with the hydraulic effects of bridge rails on floodwater levels upstream of bridge structures. The hydraulics of bridge rails and traffic barrier systems are not well understood, especially with regard to rail/barrier systems in series and the submergence of structures. The hydraulics of bridge rails is an important issue for the Texas Department of Transportation bridge rehabilitation projects with potentially significant cost implications. This research project is designed to address issues associated with the hydraulic performance of bridge rails and traffic barriers, and to provide guidance on how different rail/barrier systems can be included in floodplain hydraulics models.
KW  - Barriers (Roads)
KW  - Bridge railings
KW  - Flood plains
KW  - Hydraulics
KW  - Submerged structures
UR  - http://www.utexas.edu/research/ctr/pdf_reports/0_5492_1.pdf
UR  - https://trid.trb.org/view/891017
ER  - 

TY  - RPRT
AN  - 01129962
AU  - Varathungarajan, David A
AU  - Garfield, Scott M
AU  - Wright, Stephen G
AU  - University of Texas, Austin
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Characterization of Undrained Shear Strength Profiles for Soft Clays at Six Sites in Texas
PY  - 2009/01//Technical Report
SP  - 159p
AB  - The Texas Department of Transportation (TxDOT) frequently uses Texas Cone Penetrometer (TCP) blow counts to estimate undrained shear strength. However, the current correlations between TCP resistance and undrained shear strength have been developed primarily for significantly stronger soils than are often encountered at shallow depths. Updated existing correlations would allow TxDOT to estimate better the undrained shear strength of soft soils for the design of embankments and retaining structures. Considering the limited data for these soils, the primary objective of this study was to characterize the undrained shear strength profiles for six sites with strengths generally less than 750 psf, such as those commonly found at depths up to approximately 30 ft. The undrained shear strength profiles developed in this study were used in further research by Garfield (2008) to develop and assess the reliability of new correlations between TCP resistance and undrained shear strength of soft clays. An analysis was performed comparing strengths measured in unconsolidated-undrained, consolidated-undrained, field vane shear, and piezocone penetration tests with respect to strengths from the average strength profiles. The degree of sample disturbance in unconsolidated-undrained tests was assessed based on values of axial strain at 75% of the principal stress difference at failure. While there was significant scatter in the data, unconsolidated-undrained tests gave strengths that tended to be significantly lower than strengths from the average profiles. The degree of sample disturbance in consolidated-undrained tests was assessed based on the volumetric strain during consolidation to the in-situ effective overburden stress. Consolidated-undrained tests on disturbed specimens gave strengths that were approximately 50% higher than what was believed to be the correct strength. Strengths measured in field vane shear tests were corrected with Bjerrum’s (1972) correction factor and found to generally agree well with strengths from the average strength profiles. However, vane tests in sandy clays tended to overestimate undrained strengths. Analyses also indicated that piezocone penetration tests can be used to establish reasonably accurate undrained shear strength profiles without the need for site specific correlations.
KW  - Cone penetrometers
KW  - Geotechnical engineering
KW  - Piezocone penetration tests
KW  - Shear strength
KW  - Soft clays
KW  - Texas
KW  - Undrained shear strength
UR  - http://www.utexas.edu/research/ctr/pdf_reports/0_5824_2.pdf
UR  - https://trid.trb.org/view/890517
ER  - 

TY  - RPRT
AN  - 01129635
AU  - Carson, Jodi L
AU  - Texas Transportation Institute
AU  - Federal Highway Administration
TI  - Best Practices in Traffic Incident Management
PY  - 2009/01//Technical Report
SP  - 86p
AB  - Traffic incident management (TIM) is a planned and coordinated program to detect and remove incidents and restore traffic capacity as safely and as quickly as possible. Over time, various tools and strategies have been developed and implemented in an effort to improve overall TIM efforts. This report describes task-specific and cross-cutting issues or challenges commonly encountered by TIM responders in the performance of their duties, and novel and/or effective strategies for overcoming these issues and challenges (i.e., best practices). Task-specific challenges may include obtaining accurate information from motorists, accessing the scene, and condemning a spilled load. Cross-cutting challenges may include interagency coordination and communication, technology procurement and deployment, and performance measurement. The reported tools and strategies for improving TIM range from sophisticated, high-technology strategies to simple, procedural strategies. Information pertaining to the relative effectiveness or measurable benefits tied to each strategy was obtained through (1) published and electronic information sources and (2) input from TIM personnel in California (Bishop, Los Angeles, Redding, and Stockton), Maryland (Baltimore), Tennessee (Chattanooga), Texas (Austin), and Utah (Salt Lake City). For many of the individual tools and strategies, a wide range of effectiveness was reported by locale, challenging the explicit identification of best practices and suggesting that local conditions related to the nature and extent of operation, maintenance, marketing, etc. have a significant impact on the perceived or measured success of specific TIM efforts. The National Traffic Incident Management Coalition (NTIMC) provides a unique forum for not only disseminating the information presented here but also for standardizing practices to consistently maximize the effectiveness of TIM efforts.
KW  - Best practices
KW  - Highway operations
KW  - Highway traffic control
KW  - Incident management
UR  - http://www.nasemsd.org/Projects/HITS/documents/tim_best_practices2.pdf
UR  - https://trid.trb.org/view/889319
ER  - 

TY  - RPRT
AN  - 01129540
AU  - Abbas, Ala Rebhi
AU  - Mohi, Amal
AU  - Butterfield, Justin
AU  - University of Akron
AU  - Ohio Department of Transportation
AU  - Federal Highway Administration
TI  - Long Term Striping Alternatives for Bridge Decks
PY  - 2009/01//Final Report
SP  - 266p
AB  - This study evaluated the performance of the following pavement marking materials on portland cement concrete bridge decks:  Waterborne traffic paint: Ennis fast dry waterborne traffic paint; Preformed thermoplastic: Premark Plus and Premark Contrast; Slow cure epoxy: IPS HPS-2, Polycarb Mark 55.2, and Epoplex LS 60; Fast cure epoxy: PolyCarb Mark 55.4 and Epoplex LS 70; Polyurea: IPS HPS-5, PolyCarb Mark 75, and Epoplex Glomarc 90; Modified urethane: IPS HPS-4; Methyl methacrylate: Ennis Duraset 1 and Duraset Pathfinder; and High performance durable tapes: 3M 380WR ES, 3M 380WR-5 ES, and 3M 270 ES.  The main objectives were to compare the performance evaluation results of these materials to milestone performance criteria, augment these results with performance data from the National Transportation Product Evaluation Program (NTPEP), estimate the service life of the pavement markings, and compare these materials based on their life cycle costs.  Based on the performance evaluation results and the subsequent analysis findings, it is recommended to use the following products on portland cement concrete bridge decks:  Ennis fast dry waterborne traffic paint (for bridges with low to medium traffic volumes or as part of a mainline asphalt pavement striping project), LS 60, HPS-2, Mark 55.2, Mark 55.4, HPS-4, and HPS-5.  Grooving has been shown to improve the performance of some of these materials such as Ennis fast dry waterborne traffic paint.  Therefore, it is recommended to consider this surface preparation technique in the installation of pavement markings on portland cement concrete bridge decks that are subjected to high traffic.
KW  - Bridge decks
KW  - Epoxy resins
KW  - Life cycle costing
KW  - Methyl methacrylate
KW  - National Transportation Product Evaluation Program
KW  - Pavement grooving
KW  - Polyurea
KW  - Product evaluation
KW  - Road marking tapes
KW  - Road markings
KW  - Service life
KW  - Striping materials
KW  - Surface preparation
KW  - Thermoplastic materials
KW  - Traffic paint
KW  - Urethane
UR  - http://worldcat.org/oclc/320966935/viewonline
UR  - https://trid.trb.org/view/889949
ER  - 

TY  - RPRT
AN  - 01129529
AU  - Zhou, Fujie
AU  - Fernando, Emmanuel G
AU  - Scullion, Tom
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Transfer Functions for Various Distress Types
PY  - 2009/01//Product
SP  - 12p
AB  - The objective of Texas Department of Transportation (TxDOT) project 0-5798 is to develop the framework for the development and implementation of the next level of MEPDG (Mechanistic-Empirical Pavement Design Guide) for TxDOT (Tex-ME). One critical feature of the new system will be transfer functions which are used to estimate pavement life from the load and environmentally induced pavement stresses and strains. This product documents the research team’s recommended pavement distress transfer functions. These transfer functions should be considered as draft at this time, they will continue to be refined for the duration of this study and the final versions will be included in the project final report.
KW  - Mechanistic-Empirical Pavement Design Guide
KW  - Pavement distress
KW  - Service life
KW  - Strain (Mechanics)
KW  - Stresses
KW  - Transfer functions
UR  - http://tti.tamu.edu/documents/0-5798-P2.pdf
UR  - https://trid.trb.org/view/889839
ER  - 

TY  - RPRT
AN  - 01128959
AU  - Ellis, Ralph D
AU  - University of Florida, Gainesville
AU  - Florida Department of Transportation
AU  - Federal Highway Administration
TI  - Developing a Model to Estimate Maintenance of Traffic Quantities and Cost
PY  - 2009/01//Final Report
SP  - 85p
AB  - An investigation was conducted of the feasibility of developing a model to predict Temporary Traffic Control pay item quantities and costs from basic project descriptive information.  A historical data base of project data was assembled as a basis for developing the model.  Both linear and nonlinear methods were employed.  A software application was developed to demonstrate the model operation.
KW  - Costs
KW  - Mathematical models
KW  - Work zone traffic control
UR  - https://trid.trb.org/view/889090
ER  - 

TY  - RPRT
AN  - 01127425
AU  - Fitzsimmons, Eric J
AU  - Oneyear, Nicole
AU  - Hallmark, Shauna L
AU  - Hawkins, Neal R
AU  - Maze, Thomas H
AU  - Iowa State University, Ames
AU  - Iowa Department of Transportation
AU  - Federal Highway Administration
TI  - Synthesis of Traffic Calming Techniques in Work Zones
PY  - 2009/01//Final Report
SP  - 49p
AB  - Nationwide, over 1,000 fatalities and 40,000 injuries occur annually in work zones, which include both construction zones and areas where maintenance is performed. The majority (85%) of work zone accidents result from unsafe driver behavior, and vehicle speed is often a factor in work zone crashes. In order to address speed and driver behavior near work zones, roadway agencies have developed different traffic calming measures. The objective of this research is to summarize the effectiveness of different traffic calming treatments for reducing speeds in work zones. This project (1) identified work zone traffic calming treatments for which information has not been well summarized, (2) identified state of the art and new technologies for work zone traffic calming, and (3) synthesized research related to items 1 and 2.
KW  - Behavior
KW  - Drivers
KW  - Speed control
KW  - Speeding
KW  - Traffic calming
KW  - Work zone safety
KW  - Work zone traffic control
UR  - http://www.intrans.iastate.edu/smartwz/reports/2009-hallmark-calming.pdf
UR  - https://trid.trb.org/view/887925
ER  - 

TY  - RPRT
AN  - 01127175
AU  - Balke, Kevin N
AU  - Texas Transportation Institute
AU  - Federal Highway Administration
TI  - Traffic Incident Management in Construction and Maintenance Work Zones
PY  - 2009/01//Technical Report
SP  - 68p
AB  - In 2004, the Federal Highway Administration published updated rules governing work zone safety and mobility; all highway construction and maintenance projects using federal-aid highway funds are required to develop transportation management plans (TMP) focusing on safety and the reduction of traffic mobility impacts through coordination. The project TMP should consist of a collection of administrative, procedural, and operational strategies for managing and mitigating the impacts of work zones. It is important for planners, operations personnel, and incident responders to understand why the transportation operation elements are vital in the process of developing the TMP. This document addresses the special needs and concerns when managing traffic incidents within a work zone and focuses on incident management as a strategy to be considered in the transportation operations component of the TMP. A description of techniques and strategies that can be used to handle incidents in work zones is presented. Some trend-setting approaches used on high-profile construction projects are also showcased as examples of good incident response planning incorporated at the design level. The contractor’s role in dealing with incidents within the work zone is addressed as well as the description of processes, procedures, and practices related to the detection, response, and clearance of incidents. The importance of including incident management procedures as an element of the transportation operations component of these plans is emphasized. The goals, objectives, and reasons for incident management as well as the issues and concerns that work zone planners, incident responders, and traffic operators need to consider in the planning phases of a work zone project are presented. Common work zone incident management strategies are described.
KW  - Contractors
KW  - Incident management
KW  - Traffic incidents
KW  - Transportation management plans
KW  - Transportation operations
KW  - Work zone safety
KW  - Work zone traffic control
KW  - Work zones
UR  - http://www.ops.fhwa.dot.gov/publications/fhwahop08056/fhwahop08056.pdf
UR  - http://ntl.bts.gov/lib/30000/30800/30829/fhwahop08056.pdf
UR  - https://trid.trb.org/view/887838
ER  - 

TY  - RPRT
AN  - 01127167
AU  - Daniell, J Neil
AU  - PBS&J
AU  - Federal Highway Administration
TI  - Traffic Incident Management in Hazardous Materials Spills in Incident Clearance
PY  - 2009/01//Technical Report
SP  - 56p
AB  - Hazardous materials spills provide unique challenges to traffic incident clearance. When hazardous materials are present, not only do response personnel have to deal with typical traffic incident issues, they also must deal with potential chemical hazards, environmental impacts and added safety requirements. The mitigation and clean-up of hazardous spills can be a major source of delay in clearing traffic incidents. In many instances, expensive, time consuming removal actions are initiated when other appropriate, quicker options could be deployed safely. This document deals with the protocol and necessary knowledge required by transportation operations personnel, and first responders, such as fire-rescue and police when dealing with hazardous materials spills on the roadway, especially vehicle fluids. It provides basic knowledge necessary for transportation first responders to enable them to make proper decisions in the identification of the material and on how such spills can be safely handled. It also highlights quick, safe clearance policies and practices of transportation operations personnel when only vehicular fluid spills are involved.
KW  - First responders (Emergencies)
KW  - Hazardous materials
KW  - Hazards and emergency operations
KW  - Incident management
KW  - Spills (Pollution)
KW  - Traffic incidents
UR  - http://www.ops.fhwa.dot.gov/publications/fhwahop08058/fhwahop08058.pdf
UR  - http://ntl.bts.gov/lib/30000/30800/30831/fhwahop08058.pdf
UR  - https://trid.trb.org/view/887836
ER  - 

TY  - RPRT
AN  - 01127166
AU  - Carson, Jodi L
AU  - Texas Transportation Institute
AU  - Federal Highway Administration
TI  - Traffic Incident Management Resource Management
PY  - 2009/01//Technical Report
SP  - 114p
AB  - The necessity of a multi-disciplinary approach – involving law enforcement, fire and rescue, transportation, towing and recovery, and others – has been well-recognized and integrated into incident management operations. This same multidisciplinary approach has not been as widely extended to the area of resource management. Under a multidisciplinary approach, efficient and effective traffic incident management (TIM) resource management relies upon the utilization of: (1) appropriate personnel who are best qualified (i.e., capable but not over-qualified) for the various tasks; (2) appropriate equipment by function (i.e., use of the least costly equipment capable of performing the function); and (3) appropriate technology capable of supporting various on-site resource tasks, as well as a reduction in overall resources required through reduced redundancy across disciplines. To demonstrate the potential for enhanced TIM resource management efficiency and effectiveness, this guidebook considered various hypothetical examples for select TIM functions including motorist assistance, dispatch and response, scene protection, temporary traffic control, detour management, firefighting, minor spill mitigation and cleanup, crash investigation, victim relocation, and vehicle or debris removal. Results from an Incident Scenario Survey were used to confirm potential resource management improvements in practice and estimate order of magnitude cost savings.
KW  - Cost effectiveness
KW  - Guidelines
KW  - Incident management
KW  - Multidisciplinary approach
KW  - Resource management
KW  - Traffic incidents
UR  - http://www.ops.fhwa.dot.gov/publications/fhwahop08060/fhwahop08060.pdf
UR  - http://ntl.bts.gov/lib/30000/30800/30834/fhwahop08060.pdf
UR  - https://trid.trb.org/view/887837
ER  - 

TY  - RPRT
AN  - 01126562
AU  - Carlson, Daniel L
AU  - Gruen, Deric
AU  - Thacker, Jennifer
AU  - Washington State Transportation Center
AU  - Washington State Department of Transportation
AU  - Federal Highway Administration
TI  - Reducing Auto Congestion Around Schools: Transportation Demand Strategies for Schools Phase II Report
PY  - 2009/01//Final Research Report
SP  - 108p
AB  - This study examines efforts at ten locations in urban, suburban, and rural areas of Washington state to reduce auto use around schools. Elementary and middle school efforts emphasized and facilitated alternatives to car trips through walking, school buses, website networking, school-based campaigns, and infrastructure improvements. High school and higher education programs provided pre-paid transit service and transportation education. Key strengths of these efforts were integration into a larger policy framework, and listening and learning from customers. Elementary and middle schools programs that used education and encouragement along with engineering improvements and traffic law enforcement (the Safe Routes to School approach) and adapted to parent needs reduced auto congestion. Education and encouragement may also be beneficial for high school students. At the college/university level, mandatory universal transit/unlimited access passes reduced congestion. All efforts faced barriers, namely congestion reduction is not a primary mission of schools, and there is no larger policy framework to motivate change or site schools in ways that make alternative modes of transportation feasible. The lack of disincentives for driving, such as regulating drop-offs at K-8 schools or charging and managing parking at high schools and universities, limits the potential of trip reduction programs. The study concludes that auto congestion around schools can be reduced by state policies that set targets to reduce auto use and increase walking/bicycling, update school siting and performance standards, expand the Safe Routes to School approach and align it with transportation demand management (TDM) efforts, and require all colleges and universities to implement universal transit/unlimited access pass programs.
KW  - Bicycling
KW  - Education
KW  - Elementary schools
KW  - High schools
KW  - Highway engineering
KW  - Improvements
KW  - Middle schools
KW  - Passes (Transportation)
KW  - Public transit
KW  - Rural areas
KW  - Safe Routes to School (Program)
KW  - School buses
KW  - Schools
KW  - Suburbs
KW  - Traffic congestion
KW  - Traffic law enforcement
KW  - Traffic mitigation
KW  - Travel demand management
KW  - Universities and colleges
KW  - Urban areas
KW  - Walking
KW  - Washington (State)
UR  - http://www.wsdot.wa.gov/research/reports/fullreports/719.1.pdf
UR  - https://trid.trb.org/view/887664
ER  - 

TY  - SER
AN  - 01126559
JO  - TechBrief
PB  - Federal Highway Administration
AU  - Hall, Kathleen Theresa
TI  - Performance of Sealed and Unsealed Concrete Pavement Joints
PY  - 2009/01
SP  - 8p
AB  - This TechBrief presents the results of a nationwide study of the effects of transverse joint sealing on performance of jointed plain concrete pavement (JPCP). This study was conducted to assess whether JPCP designs with unsealed transverse joints performed differently from JPCP designs with sealed transverse joints. Distress and deflection data were collected from 117 test sections at 26 experimental joint sealing projects located in 11 states. Performance of the pavement test sections with unsealed joints was compared with the performance of pavement test sections with one or more types of sealed joints.
KW  - Concrete pavements
KW  - Data collection
KW  - Deflection
KW  - Joint sealing
KW  - Pavement distress
KW  - Pavement performance
KW  - Test sections
KW  - Transverse joints
UR  - http://www.fhwa.dot.gov/pavement/concrete/pubs/hif09013/hif09013.pdf
UR  - https://trid.trb.org/view/887658
ER  - 

TY  - SER
AN  - 01126558
JO  - TechBrief
PB  - Federal Highway Administration
AU  - Smith, Kurt D
AU  - Hoerner, Todd E
TI  - Performance-Related Specifications for Portland Cement Concrete Pavements
PY  - 2009/01
SP  - 8p
AB  - This TechBrief discusses the development and application of performance-related specifications (PRS) for the construction of portland cement concrete pavements. It provides a background summary of the basis for and early experiences with PRS, including a brief description of the PaveSpec software. This is followed by a summary of PRS trial implementations and experiences in three States: Tennessee, Florida, and Wisconsin.
KW  - Concrete pavements
KW  - Florida
KW  - PaveSpec 3.0 (Software)
KW  - Paving
KW  - Performance based specifications
KW  - Road construction
KW  - Tennessee
KW  - Wisconsin
UR  - http://www.fhwa.dot.gov/pavement/concrete/pubs/hif09011/hif09011.pdf
UR  - https://trid.trb.org/view/887657
ER  - 

TY  - RPRT
AN  - 01126550
AU  - Klaiber, F Wayne
AU  - Wipf, Terry J
AU  - Wineland, Vernon W
AU  - Iowa State University, Ames
AU  - Iowa Department of Transportation
AU  - Federal Highway Administration
TI  - Precast Concrete Elements for Accelerated Bridge Construction: Volume 3. Laboratory Testing, Field Testing, and Evaluation of a Precast Concrete Bridge: Black Hawk County
PY  - 2009/01//Final Report
SP  - 101p
AB  - The importance of rapid construction technologies has been recognized by the Federal Highway Administration (FHWA) and the Iowa Department of Transportation Office of Bridges and Structures. Black Hawk County (BHC) has developed a precast modified beam-in-slab bridge (PMBISB) system for use with accelerated construction. A typical PMBISB is comprised of five to six precast MBISB panels and is used on low volume roads, on short spans, and is installed and fabricated by county forces. Precast abutment caps and a precast abutment backwall were also developed by BHC for use with the PMBISB. The objective of the research was to gain knowledge of the global behavior of the bridge system in the field, to quantify the strength and behavior of the individual precast components, and to develop a more time efficient panel-to-panel field connection. Precast components tested in the laboratory include two precast abutment caps, three different types of deck panel connections, and a precast abutment backwall. The abutment caps and backwall were tested for behavior and strength. The three panel-to-panel connections were tested in the lab for strength and were evaluated based on cost and constructability. Two PMBISBs were tested in the field to determine stresses, lateral distribution characteristics, and overall global behavior.
KW  - Abutment caps
KW  - Accelerated construction
KW  - Backwall
KW  - Beam-in-slab bridges
KW  - Black Hawk County (Iowa)
KW  - Concrete bridges
KW  - Deck panels
KW  - Field tests
KW  - Laboratory tests
KW  - Precast concrete
KW  - Structural connection
UR  - http://publications.iowa.gov/id/eprint/13621
UR  - http://publications.iowa.gov/id/eprint/13621
UR  - http://ntl.bts.gov/lib/43000/43600/43680/TR-561_Vol_3.pdf
UR  - https://trid.trb.org/view/887654
ER  - 

TY  - RPRT
AN  - 01126549
AU  - Phares, Brent Matthew
AU  - Wipf, Terry J
AU  - Bigelow, Jake
AU  - Bowers, Ryan P
AU  - Klaiber, F Wayne
AU  - Iowa State University, Ames
AU  - Iowa Department of Transportation
AU  - Federal Highway Administration
TI  - Precast Concrete Elements for Accelerated Bridge Construction: Volume 2. Laboratory Testing, Field Testing, and Evaluation of a Precast Concrete Bridge: Madison County Bridge
PY  - 2009/01//Final Report
SP  - 100p
AB  - The importance of rapid construction technologies has been recognized by the Federal Highway Administration (FHWA) and the Iowa Department of Transportation Office of Bridges and Structures. Recognizing this, a two-lane single-span precast box girder bridge was constructed in 2007 over a stream. The bridge’s precast elements included precast cap beams and precast box girders. Precast element fabrication and bridge construction were observed, two precast box girders were tested in the laboratory, and the completed bridge was field tested in 2007 and 2008.
KW  - Accelerated construction
KW  - Beams
KW  - Box girder bridges
KW  - Box girders
KW  - Concrete bridges
KW  - Field tests
KW  - Laboratory tests
KW  - Madison County (Iowa)
KW  - Precast concrete
UR  - http://ntl.bts.gov/lib/43000/43600/43679/TR-561_Vol_2.pdf
UR  - https://trid.trb.org/view/887653
ER  - 

TY  - RPRT
AN  - 01126548
AU  - Wipf, Terry J
AU  - Klaiber, F Wayne
AU  - Hockerman, Samantha
AU  - Phares, Brent Matthew
AU  - Bowers, Ryan P
AU  - Becker, Matthew
AU  - Iowa State University, Ames
AU  - Iowa Department of Transportation
AU  - Federal Highway Administration
TI  - Precast Concrete Elements for Accelerated Bridge Construction: Volume 1-1. Laboratory Testing of Precast Substructure Components: Boone County Bridge; Volume 1-2. Laboratory Testing of Full-Depth Precast, Prestressed Concrete Deck Panels: Boone County Bridge; and Volume 1-3. Field Testing of a Precast Concrete
Bridge: Boone County Bridge
PY  - 2009/01//Final Report
SP  - 344p
AB  - In July 2006, construction began on an accelerated bridge project in Boone County, Iowa that was composed of precast substructure elements and an innovative, precast deck panel system. The superstructure system consisted of full-depth deck panels that were prestressed in the transverse direction, and after installation on the prestressed concrete girders, post-tensioned in the longitudinal direction. Prior to construction, laboratory tests were completed on the precast abutment and pier cap elements. The substructure testing was to determine the punching shear strength of the elements. Post-tensioning testing and verification of the precast deck system was performed in the field. The forces in the tendons provided by the contractor were verified and losses due to the post-tensioning operation were measured. The stress (strain) distribution in the deck panels due to the post-tensioning was also measured and analyzed. The entire construction process for this bridge system was documented. Representatives from the Boone County Engineers Office, the prime contractor, precast fabricator, and researchers from Iowa State University provided feedback and suggestions for improving the constructability of this design. All of these areas are included in this first section of Volume 1. The second section of Volume 1 focuses on the laboratory testing of full-depth precast, prestressed concrete deck panels used in the construction of the continuous four-girder, three span bridge over Squaw Creek on 120th Street in Boone County, Iowa. Various laboratory tests were conducted on a single panel and on two panels connected by a closure pour. These tests ranged from determining physical properties of the panel (compressive strength and prestressing force), to determining the panel’s response in various circumstances (moving with a crane, during field leveling, and under loading). The third and final section of Volume 1 documents the field testing portion of this project. Two field tests were carried out on the Boone County bridge. The first took place the summer following construction and the second took place one year later. A summary of the testing process, instrumentation plan, and analysis of data are located in this section of the report.
KW  - Accelerated construction
KW  - Boone County (Iowa)
KW  - Bridge abutments
KW  - Bridge decks
KW  - Bridge substructures
KW  - Concrete bridges
KW  - Field tests
KW  - Girders
KW  - Laboratory tests
KW  - Pier caps
KW  - Posttensioning
KW  - Precast concrete
KW  - Prestressed concrete
KW  - Shear strength
UR  - http://publications.iowa.gov/id/eprint/13619
UR  - http://ntl.bts.gov/lib/43000/43600/43678/TR-561_Vol_1.pdf
UR  - https://trid.trb.org/view/887648
ER  - 

TY  - SER
AN  - 01126520
JO  - TechBrief
PB  - Federal Highway Administration
TI  - Evaluating the Use of Fiber-Reinforced Polymer Bars in Continuously Reinforced Concrete Pavement
PY  - 2009/01
SP  - 8p
AB  - This TechBrief discusses the potential use of fiber-reinforced polymer (FRP) bars in continuously reinforced concrete pavements (CRCP). Relative advantages and disadvantages of FRP bars are presented, and some specific considerations for the use of FRP bars in CRCP design and construction are described. This is followed by an overview of two recent experimental CRCP projects that have been constructed with FRP bars.
KW  - Case studies
KW  - Continuously reinforced concrete pavements
KW  - Experimental roads
KW  - Fiber reinforced plastics
KW  - Reinforcing bars
UR  - http://www.fhwa.dot.gov/pavement/concrete/pubs/hif09012/hif09012.pdf
UR  - https://trid.trb.org/view/887615
ER  - 

TY  - RPRT
AN  - 01126512
AU  - Sun, Liecheng
AU  - Hopkins, Tommy C
AU  - Beckham, Tony L
AU  - University of Kentucky, Lexington
AU  - Kentucky Transportation Cabinet
AU  - Federal Highway Administration
TI  - Reduction of Stresses on Buried Rigid Highway Structures Using the Imperfect Ditch Method and Expanded Polystyrene (Geofoam)
PY  - 2009/01//Final Report
SP  - 49p
AB  - The study of earth pressure distribution on buried structures has a great practical importance in constructing highway embankments above pipes and culverts. Based on Spangler’s research, the supporting strength of a conduit depends primarily on three factors: 1) the inherent strength of the conduit; 2) the distribution of the vertical load and bottom reaction; and 3) the magnitude and distribution of lateral earth pressures which act against the sides of the structure. Rigid culverts are frequently used in Kentucky for routing streams beneath highway embankments because of rolling and mountainous terrain, numerous streams, shallow depths to bedrock, which creates unyielding foundations, and the necessity of using high fills which create large vertical stresses acting on culverts. As a means of exploring ways of reducing large vertical earth pressures acting on a buried structure, ultra-lightweight geofoam was placed in a trench above a reinforced rigid box culvert in Russell County, KY. This study provides strong evidences from both numerical model analysis and in-situ test data to indicate that geofoam is an ideal elasto-plastic material to reduce vertical load on top of a rigid culvert resting on a rigid foundation. The load on the top of a culvert can be reduced to 20% of traditional design load after 2-ft-thick geofoam is placed on top of it. Results from numerical model are more conservative when compared to actual test data. As much as 57% of settlement from geofoam has been recorded. Stresses on the top of a culvert where geofoam was placed have reached a relatively stable level which is expected at the yield point of the geofoam. This technology can be used in applications which require controlled pressure on rigid underground structure. Whether geogoam is used or not used, the model analysis and test data show that the earth pressure acting on the sidewall does not change significantly. Although the pressure acting on the sidewall is slightly higher when geofoam is used on top of the culvert only, the value is still below the design value used by the Kentucky Transportation Cabinet. Use of geofoam placed in an imperfect trench significantly reduces the vertical stresses acting on the top of the culvert.
KW  - Box culverts
KW  - Culverts
KW  - Earth pressure
KW  - Embankments
KW  - Expanded polystyrene
KW  - Field tests
KW  - Geofoam
KW  - Lateral earth pressures
KW  - Mathematical models
KW  - Pipe
KW  - Pipe culverts
KW  - Polystyrene
KW  - Stresses
KW  - Underground structures
KW  - Vertical loads
UR  - http://www.ktc.uky.edu/files/2012/06/KTC_05_05_SPR_228_01_1I.pdf
UR  - https://trid.trb.org/view/887632
ER  - 

TY  - RPRT
AN  - 01126249
AU  - Richardson, David N
AU  - Lusher, Steven Michael
AU  - Missouri University of Science and Technology, Rolla
AU  - Missouri Department of Transportation
AU  - Federal Highway Administration
TI  - Resilient Moduli of Granular Base Materials Using a Modified Type 5 Gradation
PY  - 2009/01//Final Report
SP  - 49p
AB  - The Missouri Department of Transportation (MoDOT) in collaboration with the Missouri Limestone Producers Association (MLPA) was interested in determining what effect a change in the Type 5 aggregate base gradation specification would have on the resilient modulus (M sub r) of said aggregate. The proposed change would lower the minimum allowable total percentage of material passing the #4 (4.75 mm mesh) sieve from 35% to 25%, and the #30 (0.600 mm mesh) sieve from 10% to 5%. The remainder of the gradation specification would remain unchanged. The rationale for this proposed change is that some aggregate producers believe the change could help lower their costs of producing a Type 5 aggregate base material. To investigate the proposed gradation specification change, an experimental gradation was devised which followed the lower bounds of the proposed gradation specification on the #4, #30, and #200 sieves, and approximated the as-delivered gradations of two aggregate formations previously tested for MoDOT on the 3/8, ½, ¾, and 1 in. sieves, making it a relatively open-graded material. Thus, two different aggregate sources were tested. In the previous study for MoDOT, two gradations were analyzed: as-delivered Type 5 materials, and gradations with elevated fines contents. Both gradations could be considered to be high-fines content materials, with minus #200 contents between 11 and 18%. As a result of changing the gradation to fit the lower proposed specification limits, the experimental gradation in the present study contained no minus #200 material, and had significantly more #4 retained material, but less #8 retained material. The resulting M sub r values in this study were greater than the results from the previous study for the same aggregates. Besides a change in gradation, the degrees of saturation for the proposed, more open-graded gradation were significantly lower than seen in the previous study for the same aggregate types.
KW  - Aggregate gradation
KW  - Fines (Materials)
KW  - Fines content
KW  - Granular materials
KW  - Modulus of resilience
KW  - Percent saturation
KW  - Specifications
UR  - http://library.modot.mo.gov/RDT/reports/Ri08021/or09015.pdf
UR  - http://ntl.bts.gov/lib/30000/30600/30660/or09015.pdf
UR  - https://trid.trb.org/view/887563
ER  - 

TY  - RPRT
AN  - 01125352
AU  - Birenbaum, Ingrid
AU  - PBS&J
AU  - Federal Highway Administration
TI  - Information Sharing for Traffic Incident Management
PY  - 2009/01//Technical Report
SP  - 54p
AB  - Traffic incident management focuses on developing procedures, implementing policies, and deploying technologies to more quickly identify incidents, improve response times, and more effectively and efficiently manage the incident scene. Because so many entities are involved in response efforts, rapid and effective traffic incident management relies on successful information sharing between public safety agencies, transportation agencies, and other public and private sector incident responders. This document identifies and summarizes the information needs of public and private incident responders. It describes how information is obtained and shared during an event in order to best support safe, quick response. Additionally this document addresses technical and institutional barriers to information exchange as well as methods devised to overcome these barriers. This report presents key research showcasing the advantages of data sharing between multiple agencies. It identifies and summarizes the information needs of various incident response agencies, describing the means to obtain and share information during an event. Case study information is also presented to illustrate various means of information sharing. Collection and distribution of information is addressed in the context of the incident timeline. Selected best practices for information sharing are presented. Various information sharing barriers are presented as well as some strategies to overcome them.
KW  - Data collection
KW  - Data sharing
KW  - Highway traffic control
KW  - Incident management
KW  - Information dissemination
KW  - Needs assessment
KW  - Traffic incidents
UR  - http://www.ops.fhwa.dot.gov/publications/fhwahop08059/default.htm
UR  - http://www.ops.fhwa.dot.gov/publications/fhwahop08059/tim_info_sharing.pdf
UR  - http://ntl.bts.gov/lib/30000/30800/30832/tim_info_sharing.pdf
UR  - https://trid.trb.org/view/886076
ER  - 

TY  - RPRT
AN  - 01124905
AU  - Felker, Victoria
AU  - Parcells, William H
AU  - Kansas Department of Transportation
AU  - Federal Highway Administration
TI  - The Effectiveness of the Fly-Ash Slurry Injection Method to Eliminate Depressed Transverse Cracks
PY  - 2009/01//Final Report
SP  - 64p
AB  - One of the primary causes of increasing roughness in asphalt pavements in Kansas has been naturally occurring transverse cracks.  Maintenance forces continually tried to seal the cracks; however, the cracks continued to grow wider and the depressions deeper.  A review of the history of transverse cracking on I-70 in the western half of Kansas reveals that very wide cracks (top down) developed in cold weather and no suitable treatments were available from the 1960s through the 1980s.  It was common to have cracks about 60 ft apart, 4 to 5 in. wide, depressed 2 to 3 in. and extended across all lanes.  In this study, the nature and extent of transverse cracking in asphalt pavements on I-70 in Kansas was determined.  A pavement investigation was conducted to determine the effectiveness of the Fly Ash Slurry Injection (FASI) method (a crack stabilization procedure) to eliminate or minimize the depression (bump) caused by the depressed pavement on both sides of the transverse cracks.  The intent of the FASI was to fill the subsurface voids at severely distressed transverse cracks to delay depression and reflective cracking, because the pavements were structurally sufficient for the traffic loading.  The initial objective of the study was to find a low-cost "maintenance" approach to improve ride by filling the transverse cracks and their associated depression.  A variety of products and application procedures were attempted, with variable results.  Most attempts re-cracked within a year, and depression soon followed.
KW  - Asphalt pavements
KW  - Fly ash
KW  - Injection grouting
KW  - Kansas
KW  - Slurry
KW  - Transverse cracking
KW  - Void filling
UR  - http://www.ksdot.org/PublicLib/publicDoc.asp?ID=003784475
UR  - http://ntl.bts.gov/lib/30000/30900/30928/FHWA-KS-07-6_Final_Report.pdf
UR  - https://trid.trb.org/view/886101
ER  - 

TY  - RPRT
AN  - 01124902
AU  - Lambert, James H
AU  - Schroeder, Matthew J
AU  - Virginia Transportation Research Council
AU  - Virginia Department of Transportation
AU  - Federal Highway Administration
TI  - Scenario-Based Transportation Planning with Involvement of Metropolitan Planning
Organizations
PY  - 2009/01//Final Contract Report
SP  - 66p
AB  - The Office of Virginia’s Secretary of Transportation identified 21 transportation policies and 42 performance criteria in Virginia’s long-range multimodal transportation plan, VTrans2025. A subsequent planning effort, VTrans2035, provided direction for the effort described in this report. Although there has been considerable discussion of the potential impact of the VTrans policies on the Commonwealth as a whole, there has been little effort to characterize the regional and local impact of the policies. Further, the sensitivity of the policies to a variety of assumptions about the future needs to be better understood at statewide, regional, and local levels. This research effort developed and tested a methodology for scenario-based assessments of the impacts of the VTrans polices for several regions of the Commonwealth of Virginia. The methodology is implemented in an MS Excel workbook that is available for download at www.virginia.edu/crmes/multimodal2. This report describes a typical application of the methodology for a locality or regional planning organization, e.g., a Metropolitan Planning Organization (MPO) or Planning District Commission (PDC), to assess the impact of statewide multimodal policies across several of its long-range planning scenarios. The report includes a review of scenario-based planning, documentation of future scenarios, preliminary results of a survey of MPOs in Virginia for their best practices in scenario-based planning, an application of the methodology to the Roanoke region of Virginia, and recommendations. A major recommendation is that the methodology be used in VTrans2035 to catalyze and benchmark Virginia MPOs and localities in their respective efforts involving scenario-based transportation planning. The effort provides a cost-effective analysis tool that enables VTrans and MPOs and PDCs to identify and collaborate on the regional impacts of statewide transportation planning. The tool can further be cost-effective for individual MPOs and localities to engage in scenario-based long-range planning as encouraged by the Federal Highway Administration, particularly to guide the assumptions that are input to regional travel demand models. Appendix A provides the survey and study of scenario-based planning best practices. Appendix B documents the design of the Microsoft Excel workbook developed in this effort. Appendix C provides the lists of statewide policies, scenarios, and performance criteria used in the deployment of the workbook. Appendix D describes a related input/output analysis of economic growth based on transportation investments that was requested by the Office of Intermodal Planning and Investment. The developed methodology is being adapted for long-range scenario-based analysis of the Afghanistan Sustainable Infrastructure Plan, with research support from the U.S. Army Corps of Engineers.
KW  - Best practices
KW  - Cost effectiveness
KW  - Economic growth
KW  - Forecasting
KW  - Impact studies
KW  - Long range planning
KW  - Methodology
KW  - Metropolitan planning organizations
KW  - Multimodal transportation
KW  - Regional planning
KW  - Roanoke (Virginia)
KW  - Transportation planning
KW  - Transportation policy
KW  - Virginia
UR  - http://virginiadot.org/vtrc/main/online_reports/pdf/09-cr5.pdf
UR  - http://ntl.bts.gov/lib/37000/37700/37706/09-cr5.pdf
UR  - https://trid.trb.org/view/886090
ER  - 

TY  - RPRT
AN  - 01124899
AU  - Nagabhushanam, Mahesh Gajula
AU  - Ramirez, Guillermo
AU  - University of Texas, Arlington
AU  - Kansas Department of Transportation
AU  - Federal Highway Administration
TI  - The Effects of Temperature on Fiber Composite Bridge Decks
PY  - 2009/01//Final Report
SP  - 168p
AB  - In this study the fiber composite bridge decks were subjected to thermal gradients to obtain the temperature difference between the top and bottom surface of the decks and to determine the thermal properties of the deck.  The fiber composite bridge decks were fabricated in sizes of 2 ft wide x 8 ft long x .5 ft deep and 4 ft wide x 8 ft long x .5 ft deep specimens by Kansas Structural Composites Inc.  The project consisted of 3 specimens of size 2 ft wide x 8 ft long x .5 ft deep with the ribs oriented along the longitudinal direction, 3 specimens of size 2 ft wide x 8 ft long x .5 ft deep with ribs oriented along the transverse direction, and a specimen of size 4 ft wide x 8 ft long x .5 ft deep with ribs oriented along  the transverse direction.  Two specimens with the ribs oriented along the lognitudinal direction and two specimens with ribs oriented along the transverse direction of size 2 ft wide x 8 ft long x .5 ft deep were subjected to a temperature greater than 120 deg F with unrestrained ends.  Four tests were carried out on two specimens having ribs oriented along the longitudinal direction and two specimens having ribs oriented along the transverse direction with the shorter ends restrained.  The top surface was exposed to constant temperature until the temperature and the strain linearized at the bottom surface of the fiber composite deck to obtain the difference in temperature between the top and bottom surface of the deck.  The decks were restrained using a mechanical setup made up of fiber composite sections.  A single specimen of size 4 ft wide x 8 ft long x .5 ft deep was tested for thermal loads greater than 120 deg F with unrestrained ends.  The strain readings were recorded using strain gage technology from Vishay Micro Measurements and the displacement was measured for specimens with restrained ends using cable extension displacement sensor at half span.  A prototype fiber composite deck was modeled using PRO-E and analyzed using ANSYS FEM software.
KW  - Bridge decks
KW  - Fiber composites
KW  - Laboratory tests
KW  - Temperature gradients
KW  - Thermal properties
UR  - http://www.ksdot.org/PublicLib/publicDoc.asp?ID=003784479
UR  - http://ntl.bts.gov/lib/30000/30800/30874/FHWA-KS-08-9_FinalReport.pdf
UR  - https://trid.trb.org/view/886103
ER  - 

TY  - RPRT
AN  - 01124333
AU  - Liu, Wenting
AU  - Scullion, Tom
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - PAVECHECK: Integrating Deflection and GPR for Network Condition Surveys
PY  - 2009/01//Technical Report
SP  - 26p
AB  - The PAVECHECK data integration and analysis system was developed to merge Falling Weight Deflectometer (FWD) and Ground Penetrating Radar (GPR) data together with digital video images of surface conditions. In this study Global Positioning System (GPS) was added to the system, and both the existing data collection and data processing programs were modified. One goal of this study was to evaluate the potential of using the upgraded PAVECHECK system to collect network level pavement condition data to assist in pavement rehabilitation planning. GPR data were collected on the entire roadway network for Williamson County in the Austin District. Collecting the entire 400 center lane miles took less than 10 days. Maps showing the limits of the data collection activities were developed. The upgraded system and the outputs from Williamson County are described in this report. The collected data and upgraded software has been delivered to district personnel. This system has tremendous potential to assist Texas Department of Transportation (TxDOT) engineers with future forensic and pavement rehabilitation studies. The PAVECHECK framework can also assist in future pavement layer database efforts and in documenting and evaluating the performance of research test sections.
KW  - Condition surveys
KW  - Data collection
KW  - Digital video
KW  - Falling weight deflectometers
KW  - Global Positioning System
KW  - Ground penetrating radar
KW  - Maintenance management
KW  - PAVECHECK (Computer program)
KW  - Pavement performance
KW  - Rehabilitation (Maintenance)
KW  - Williamson County (Texas)
UR  - http://tti.tamu.edu/documents/5-4495-01-2.pdf
UR  - https://trid.trb.org/view/885759
ER  - 

TY  - RPRT
AN  - 01124330
AU  - Anderson, Stuart D
AU  - Damnjanovic, Ivan D
AU  - Nejat, Ali
AU  - Ramesh, Sushanth
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Synthesis on Construction Unit Cost Development
PY  - 2009/01//Technical Report
SP  - 142p
AB  - Availability of historical unit cost data is an important factor in developing accurate project cost estimates. State highway agencies (SHAs) collect data on historical bids and/or production rates, crew sizes and mixes, material costs, and equipment costs, including contractor overhead and profit. The goal of this synthesis is to identify how state highway agencies develop unit prices for construction and maintenance projects. The synthesis approach consists of a comprehensive online survey, covering every aspect of unit cost development, to identify the state of practice in state highway agencies and interviews with several representative SHAs to gain a better understanding of the practices followed for unit cost development. This study finds that even though SHAs collect and store historical cost data, they do not have a formal and documented process for adjusting unit costs for project characteristics and market conditions.
KW  - Construction projects
KW  - Cost estimating
KW  - Highway projects
KW  - Interviewing
KW  - Project costs
KW  - Road construction
KW  - State highway departments
KW  - State of the practice
KW  - Surveys
KW  - Unit costs
UR  - http://tti.tamu.edu/documents/0-6023-1.pdf
UR  - https://trid.trb.org/view/885767
ER  - 

TY  - RPRT
AN  - 01124311
AU  - Outcalt, William
AU  - Colorado Department of Transportation
AU  - Federal Highway Administration
TI  - Work Zone Speed Control
PY  - 2009/01//Final Report
SP  - 40p
AB  - Traffic in the lanes next to work zones presents a continuous hazard to workers. By reducing the speed of the traffic through the work zone, the hazard can be mitigated somewhat. Accurate data on the effectiveness of the simultaneous use of radar detection devices and law enforcement support in work zones would be valuable information for equipment purchasing and budgeting purposes. A literature search found 17 studies relating to work zone speed control and investigating the use of variable message signs (VMS), presence of law enforcement, and various signing methods. However, none provided current documentation of the effectiveness of the use of a VMS in conjunction with the presence of a law enforcement officer who was ticketing violators. The study found that the most dependable method of ensuring compliance with posted work zone speed limits is through the presence of law enforcement in the work zone, citing speeders. This research provides the Colorado Department of Transportation (CDOT) with methods for effective management traffic speed in the vicinity of work zones. It will result in more reliable control of traffic speeds near work zones, improving safety for both the workers and the traveling public. Safety and traffic engineers and maintenance planners can use it to plan effective traffic control in work areas.
KW  - Colorado
KW  - Compliance
KW  - Literature reviews
KW  - Speed control
KW  - Speed limits
KW  - Traffic law enforcement
KW  - Work zone safety
KW  - Work zone traffic control
UR  - http://www.coloradodot.info/programs/research/pdfs/2009/workzonespeed.pdf/at_download/file
UR  - https://trid.trb.org/view/885637
ER  - 

TY  - RPRT
AN  - 01124308
AU  - Al-Qadi, Imad L
AU  - Masson, Jean-Francois
AU  - Fini, Eli H
AU  - Yang, Shih-Hsien
AU  - McGhee, Kevin Kenneth
AU  - University of Illinois, Urbana-Champaign
AU  - Virginia Department of Transportation
AU  - Federal Highway Administration
AU  - Virginia Transportation Research Council
TI  - Development of Performance-Based Guidelines for Selection of Bituminous-Based
Hot-Poured Pavement Crack Sealant: An Executive Summary Report
PY  - 2009/01//Final Contract Report
SP  - 41p
AB  - This report summarizes research presented in separate technical reports, papers, and journal articles that collectively document the development of a systematic process to aid in the selection of appropriate bituminous hot-poured sealants for pavement cracks and joints. The following process elements are summarized herein: Apparent Viscosity Test for Hot-Poured Crack Sealants, Development of a Short-Term Aging Test and Low-Temperature Testing Bibliography, Sealant Flow and Deformation by Dynamic Shear Rheometry in Summer Temperatures, Characterization of Low Temperature Creep Properties of Crack Sealants Using Crack Sealant Bending Beam Rheometry, Characterization of Low Temperature Mechanical Properties of Crack Sealants Using Crack Sealant Direct Tension Test, and Development of Adhesion Tests for Crack Sealants at Low Temperature. This report brings the results of this cumulative research together to introduce a set of tests and performance parameters for sealant at installation and service temperatures; an aging procedure to simulate sealant weathering; and most important, a simplified chart with thresholds for all performance parameters for the straightforward selection of crack sealant.
KW  - Adhesion
KW  - Aging (Materials)
KW  - Bituminous materials
KW  - Creep tests
KW  - Guidelines
KW  - Hot-pour sealants
KW  - Literature reviews
KW  - Low temperature tests
KW  - Mechanical properties
KW  - Pavement cracking
KW  - Pavement joints
KW  - Rheometers
KW  - Sealing compounds
KW  - Tension tests
KW  - Viscosity
UR  - http://www.virginiadot.org/vtrc/main/online_reports/pdf/09-cr7.pdf
UR  - https://trid.trb.org/view/885601
ER  - 

TY  - SER
AN  - 01124305
JO  - Civil Engineering Studies, Illinois Center for Transportation Series
PB  - University of Illinois, Urbana-Champaign
AU  - Al-Qadi, Imad L
AU  - Carpenter, Samuel H
AU  - Roberts, Geoffrey L
AU  - Ozer, Hasan
AU  - Aurangzeb, Qazi
AU  - Elseifi, Mostafa A
AU  - Trepanier, James
AU  - University of Illinois, Urbana-Champaign
AU  - Illinois Department of Transportation
AU  - Federal Highway Administration
TI  - Determination of Usable Residual Asphalt Binder in RAP
PY  - 2009/01//Research Report
IS  - 09-031
SP  - 101p
AB  - For current recycled mix designs, the Illinois Department of Transportation (IDOT) assumes 100% contribution of working binder from Recycled Asphalt Pavement (RAP) materials when added to Hot Mix Asphalt (HMA). However, it is unclear if this assumption is correct and whether some binder may potentially be acting as “black rock,” and not participating in the blending process with the new binder. Furthermore, it is also unclear whether binder modifications should be considered in the mix design for recycled HMA. The goal of this research was to determine if the current IDOT mix design practice required modification with respect to the use of RAP. A set of mixtures was prepared using RAP in accordance with current practice. Additional sets were prepared using recovered binder and recovered aggregate to simulate the effect of RAP binder blending with virgin binder. Mixes containing 0, 20, and 40% RAP were prepared and the dynamic modulus testing results of these mixtures were compared to illustrate the effect of RAP on HMA. Tests on recovered, virgin, and blended binders were also conducted using the Dynamic Shear Rheometer (DSR). This study found that up to 20% RAP in HMA does not require a change in binder grade. However, at 40% RAP in HMA, a binder grade bump at high temperature and possibly at low temperature is needed; more tests are required to verify the need for low temperature binder grade bumping. In addition, this study recommends RAP fractionation in the preparation of laboratory specimens.
KW  - Bituminous binders
KW  - Dynamic modulus of elasticity
KW  - Hot mix asphalt
KW  - Laboratory tests
KW  - Mix design
KW  - Recycled asphalt pavements
KW  - Rheometers
UR  - http://www.ict.uiuc.edu/Publications/report%20files/FHWA-ICT-09-031.pdf
UR  - http://ntl.bts.gov/lib/31000/31000/31019/ICT-09-031.pdf
UR  - https://trid.trb.org/view/885600
ER  - 

TY  - RPRT
AN  - 01124304
AU  - Haas, Robert
AU  - Carter, Mark
AU  - Perry, Eric
AU  - Trombly, Jeffrey
AU  - Bedsole, Elisabeth
AU  - Margiotta, Richard
AU  - Science Applications International Corporation
AU  - Federal Highway Administration
TI  - iFlorida Model Deployment Final Evaluation Report
PY  - 2009/01
SP  - 274p
AB  - This document is the final report for the evaluation of the USDOT-sponsored Surface Transportation Security and Reliability Information System Model Deployment, or iFlorida Model Deployment. This report discusses findings in the following areas:  ITS deployment and operations; Maintaining a Network of Field Devices; Using Toll Tag Readers for Traffic Monitoring; Interfacing TMC and FHP CAD Systems; Using Dynamic Message Signs for Traveler Information; Implementing Variable Speed Limits; Statewide Operations; Evacuation Operations; Traveler Information Operations; Weather Data; and Transportation Security. It discusses costs and benefits associated with iFlorida activities in each of these areas and lessons learned in pursuing those activities.
KW  - Automated toll collection
KW  - Benefits
KW  - Computer aided dispatch systems
KW  - Costs
KW  - Evacuation
KW  - Intelligent transportation systems
KW  - ITS deployment
KW  - Lessons learned
KW  - Model deployment
KW  - Security
KW  - Traffic surveillance
KW  - Traveler information and communication systems
KW  - Variable message signs
KW  - Variable speed limits
KW  - Weather
UR  - http://www.ops.fhwa.dot.gov/publications/fhwahop08050/iFlorida.pdf
UR  - http://ntl.bts.gov/lib/30000/30800/30827/iflorida.pdf
UR  - http://ntl.bts.gov/lib/31000/31000/31051/14480.htm
UR  - https://trid.trb.org/view/885651
ER  - 

TY  - SER
AN  - 01124303
JO  - TechBrief
PB  - Federal Highway Administration
AU  - Merritt, David K
AU  - Tayabji, Shiraz
TI  - Precast Prestressed Concrete Pavement for Reconstruction and Rehabilitation of Existing Pavements
PY  - 2009/01
SP  - 8p
AB  - This TechBrief describes the application of precast prestressed concrete pavement for new construction and for rehabilitation of existing asphalt and concrete pavements. The background of the development of precast prestressed pavement technology is briefly summarized. The details of several field trials of this innovative technology are presented, and recommendations for ensuring successful precast prestressed concrete pavement installation are provided.
KW  - Asphalt pavements
KW  - Concrete pavements
KW  - Field tests
KW  - Precast concrete pavements
KW  - Prestressed concrete pavements
KW  - Recommendations
KW  - Reconstruction
KW  - Rehabilitation (Maintenance)
KW  - Technological innovations
UR  - http://www.fhwa.dot.gov/pavement/concrete/pubs/if09008/if09008.pdf
UR  - https://trid.trb.org/view/885625
ER  - 

TY  - RPRT
AN  - 01123020
AU  - Harris, Scott
AU  - Colorado Department of Transportation
AU  - Colorado Department of Transportation
AU  - Federal Highway Administration
TI  - Colorado Department of Transportation's Current Procedure for Life Cycle Cost Analysis and Discount Rate Calculations
PY  - 2009/01//Final Report
SP  - 15p
AB  - This report provides information on life cycle cost analysis (LCCA) as applied to Colorado Department of Transportation (CDOT) roadways. It describes the current method CDOT uses to select a discount rate. It also summarizes data collected from several states listing their hot mix asphalt (HMA) overlay cycles and discount rates. To implement these results, the discount rate will be calculated annually by the HQ Materials Pavement Design Unit and distributed to the Pavement Design Engineers in each Region for use in their LCCA.
KW  - Bituminous overlays
KW  - Colorado
KW  - Colorado Department of Transportation
KW  - Discount rates
KW  - Hot mix asphalt
KW  - Life cycle costing
KW  - Pavement design
UR  - http://www.dot.state.co.us/publications/PDFFiles/lcca2009.pdf
UR  - https://trid.trb.org/view/884765
ER  - 

TY  - RPRT
AN  - 01123011
AU  - Damnjanovic, Ivan D
AU  - Anderson, Stuart D
AU  - Wimsatt, Andrew
AU  - Reinschmidt, Kenneth F
AU  - Pandit, Devanshu
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Evaluation of Ways and Procedures to Reduce Construction Cost and Increase Competition
PY  - 2009/01//Technical Report
SP  - 192p
AB  - Construction cost inflation is affecting many state highway agencies including the Texas Department of Transportation. While some of this increase can be attributed to factors such as soaring cost of energy, reports of large variations in cost of bid items among different districts indicate that the problem is more complex. Indeed, there are many other factors affecting the recent increase in construction cost including design requirements, work restrictions, bidding procedures, and competition. The goal of this research is to identify these factors, or the root causes contributing to the increase in construction cost, and propose the methods that can address them. The research approach is based on four sequential steps: identification of the methods, collection of the data from the interim workshops, assessment of the impact of the methods on adopted performance measures, and development of recommendations and guidelines on how to modify construction projects to reduce or contain the construction cost while maintaining quality. The results from a Delphi study show that the cost reduction methods (both on a project and program level) could be used to reduce or contain the cost of highway construction.
KW  - Competition
KW  - Construction projects
KW  - Cost reduction
KW  - Costs
KW  - Data collection
KW  - Delphi method
KW  - Road construction
KW  - Workshops
UR  - http://tti.tamu.edu/documents/0-6011-1.pdf
UR  - https://trid.trb.org/view/884746
ER  - 

TY  - JOUR
AN  - 01121683
JO  - Public Roads
PB  - Federal Highway Administration
AU  - Butler, Randy W
TI  - Electronic Freight Management
PY  - 2009/01
VL  - 72
IS  - 4
SP  - pp 34-38
AB  - Recognizing the value of improved freight tracking, the U.S. Department of Transportation launched the Electronic Freight Management (EFM) research initiative in 2006. This article summarizes the EFM initiative, which is addressing the challenge of tracking freight accurately and in real time. Specifically, the EFM system focuses on developing an open, Internet-based system for tracking freight as it moves across borders and from mode to mode, without the expense of engaging proprietary shipping services.  The EFM system, now entering its third and final phase of evaluation and deployment, will be available in 2009 as a Web-based tool accessible to all businesses and shippers in the United States or abroad to configure their supply chains and connect with their supply chain partners. An end-to-end system for tracking shipping information, EFM mimics the efficiencies of proprietary, integrated systems for enhanced tracking and security connecting all supply chain partners in the information loop rather than parsing information out on an individual, piecemeal basis. The EFM system provides near real-time information sharing --tracking the movement of goods from the time of order to the manufacturer to the time of delivery. The EFM research has three main goals: (1) improving the efficiency and productivity of the freight logistics supply chain through the electronic exchange of shipping information from origin to destination, (2) improving data accuracy throughout the process, and (3) minimizing costs for shippers and supply chain partners. As companies implement the EFM system, the benefits will include driving down deployment costs, increasing participation, and enlarging the total flow of benefits. These types of technologies, if implemented with international standards, can play a major role in expanding the effective capacity of the Nation's transportation system, improving efficiencies and reliability, and enhancing shipment integrity.
KW  - Automatic tracking
KW  - Automation
KW  - Data communications
KW  - Freight documents
KW  - Freight traffic
KW  - Internet
KW  - Logistics
KW  - Real time information
KW  - Supply chain management
UR  - http://www.fhwa.dot.gov/publications/publicroads/09janfeb/06.cfm
UR  - https://trid.trb.org/view/882499
ER  - 

TY  - JOUR
AN  - 01121680
JO  - Public Roads
PB  - Federal Highway Administration
AU  - Kar, Kohinoor
AU  - Weeks, Richard S
TI  - The Sound of Safety
PY  - 2009/01
VL  - 72
IS  - 4
SP  - pp 10-16
AB  - In Arizona, centerline crossover crashes result in a significant percentage of serious injuries and fatalities on the state's rural, high-speed, two-lane roads. To enhance safety, in 2002 the Arizona Department of Transportation (ADOT) began pilot installations of centerline rumble strips (CLRSs) on 14 stretches of low-volume, high-speed, two-lane, rural State highways. The roadways included principal arterials, minor arterials, and minor collectors. The rumble strip pattern used was based on the standard pattern in use at that time for milled edge-line rumble strips.  Crash data from 3 years before (2000-2002) and 3 years after (2003-2005) the installations was evaluated to determine the effectiveness of CLRSs in mitigating centerline crossover crashes.   Results showed that the number of fatal and serious injury crashes decreased by 61% after CLRSs were installed.  Centerline crossover crashes accounted for 36% of the total fatal and serious injury crashes occurring in 2000-2002 and 22% in 2003-2005. CLRSs helped reduce the number of serious injury and fatal head-on and opposite direction sideswipe crashes from 18 in the "before" period to 7 in the "after" period. The ADOT study found that serious injury and fatal centerline crossover crashes involving fatigued, inattentive, and impaired drivers may be independent of roadway alignment. CLRSs have the potential to reduce these crashes. ADOT found no degradation of pavement that could be attributable to the milled CLRSs and no negative impact of CLRSs on snow and ice removal. ADOT's pattern for milled rumble strips generates about 70 decibels of sound at 152 meters (500 feet), which limits installations near roadside residences. Based on these findings and those of other studies, ADOT believes that milled CLRSs have the potential to prevent and reduce opposite direction crashes on undivided highways. ADOT currently is finalizing a CLRS policy, developing installation guidelines, creating CLRS groove pattern standard details, and defining the elements of an implementation program.
KW  - Arizona
KW  - Arizona Department of Transportation
KW  - Before and after studies
KW  - Center lines
KW  - Crash rates
KW  - Crossover accidents
KW  - Field studies
KW  - Highway safety
KW  - Rumble strips
KW  - Rural highways
KW  - Two lane highways
KW  - Undivided highways
UR  - http://www.fhwa.dot.gov/publications/publicroads/09janfeb/02.cfm
UR  - https://trid.trb.org/view/882495
ER  - 

TY  - JOUR
AN  - 01121678
JO  - Public Roads
PB  - Federal Highway Administration
AU  - Graybeal, Benjamin A
TI  - UHPC Making Strides
PY  - 2009/01
VL  - 72
IS  - 4
SP  - pp 17-21
AB  - Recent advances in research on cementitious materials have led to development of a new class of market-ready materials with many times the strength and durability of conventional concretes. This emerging technology, known as ultra-high performance concrete (UHPC), could have a significant effect on the U.S. highway system.  This article discusses the challenges that are limiting widespread implementation of projects using UHPC as well as the steps the Federal Highway Administration (FHWA) is taking to overcome these issues. The article also highlights the first three deployments of UHPC in U.S. highway bridge projects. FHWA has identified five reasons for the slow pace of UHPC deployment thus far:   (1) manufacturers are unlikely to invest in innovative technologies unless they see a clear financial benefit; (2) owners (in this case government agencies) traditionally are risk-averse and tend to take measured responses when presented with innovative solutions to existing problems; (3)  a lack of design code provisions relevant to the advanced properties of UHPC; (4) the limited number of applications of UHPC to date means that limited experience is available with regard to inspection, maintenance, and repair of UHPC structures; and (5) the higher cost of the constituent materials in UHPC results in a higher per-unit volume cost than conventional concretes.  Research related to the development, properties, and application of UHPC is progressing despite these hurdles. Four FHWA research studies on UHPC are underway: a project to develop a modular precast, prestressed concrete decked girder system applicable to typical highway bridges; a project focused on developing an alternative to replacing deteriorated bridge decks when their superstructures remain viable; a project focused on quantifying the advanced structural and durability properties of UHPC; and a project to address issues of immediate importance to the industry tasked with fabricating UHPC components.
KW  - Concrete
KW  - Deployment
KW  - Highway bridges
KW  - Product development
KW  - Research projects
KW  - Technological innovations
KW  - U.S. Federal Highway Administration
KW  - Ultra high performance concrete
UR  - http://www.fhwa.dot.gov/publications/publicroads/09janfeb/03.cfm
UR  - https://trid.trb.org/view/882496
ER  - 

TY  - JOUR
AN  - 01121650
JO  - Public Roads
PB  - Federal Highway Administration
AU  - Zirlin, Julie
TI  - Bringing Innovations to Market
PY  - 2009/01
VL  - 72
IS  - 4
SP  - pp 22-27
AB  - This article describes a Federal Highway Administration (FHWA) program that is helping highway industry innovations make the leap from promising prototypes to market-ready products. The Technology Partnerships Program provides grants to fund the critical final steps in developing technologies with potential to improve project or work zone safety, accelerate construction, reduce construction-related congestion, or improve quality. The program, established in 2007, also promotes partnerships to test and demonstrate those technologies in real-world settings. The grants enable companies to adapt nonhighway-related innovations to highway use or refine existing equipment, materials, or processes that are not common practice in the transportation industry.  The Technology Partnerships Program is part of Highways for LIFE, an FHWA initiative to accelerate innovation in the highway industry. So far, FHWA has awarded Technology Partnerships grants of $200,000 to $500,000 to five companies to refine and evaluate prototype technologies. The projects include an all-weather pavement marking system for work zones, an intelligent asphalt compaction analyzer, an aggregate imaging system, an automated pavement marker placement system, and an asphalt binder cracking device.  FHWA plans to announce the recipients of a second round of Technology Partnerships grants in spring 2009.
KW  - Equipment
KW  - Grant aid
KW  - Market development
KW  - Pavements
KW  - Product development
KW  - Prototypes
KW  - Public private partnerships
KW  - Systems
KW  - Technological innovations
KW  - Technology Partnerships Program
KW  - Technology transfer
KW  - U.S. Federal Highway Administration
UR  - http://www.fhwa.dot.gov/publications/publicroads/09janfeb/04.cfm
UR  - https://trid.trb.org/view/882497
ER  - 

TY  - JOUR
AN  - 01121641
JO  - Public Roads
PB  - Federal Highway Administration
AU  - Crumpacker, Jim H
TI  - Fostering a Culture of Ethics
PY  - 2009/01
VL  - 72
IS  - 4
SP  - pp 28-33
AB  - This article describes how ethics can affect the U.S. transportation program and what can be done to ensure members of the transportation community abide by ethical principles and standards.  All transportation professionals who carry out programs involving construction and maintenance of the Nation's roadways represent the first line of defense in ensuring program integrity and upholding public trust. The consequences of ethical lapses and fraud can be grave: project delays, increased costs, loss of public trust, and loss of life and injuries when safety is involved. At the Federal level, two core concepts underlie ethical principles and standards:  employees shall not use public office for private gain, and employees shall act impartially and not give preferential treatment to any private organization or individual.   Employees also must avoid any action that would create even the appearance that they are violating the law or ethical standards. Ethical lapses by individuals in critical positions do occur, sometimes resulting in scandals that significantly undermine public confidence and compromise of the traveling public's safety.  Having a strong culture of ethics in the workplace is central to promoting program effectiveness and preventing or stopping fraud, waste, abuse, and other irregularities. An effective ethics program and culture is needed to combat potential issues before they cause harm to agencies, their public images, or the important services they provide. Effective internal controls and oversight mechanisms also must be in place to detect and reduce instances of fraud. Managers and supervisors need to be aware that employees may be reluctant to report incidences of misconduct.  Management must lead by personal example and ethics programs need to be multifaceted, with increased attention given to employees involved in awarding and administering contracts, cooperative agreements, and grants. Managers also need to take strong disciplinary actions when ethical lapses occur.
KW  - Ethics
KW  - Fraud
KW  - Government employees
KW  - Management
KW  - Oversight
KW  - Transportation
KW  - Trust (Psychology)
UR  - http://www.fhwa.dot.gov/publications/publicroads/09janfeb/05.cfm
UR  - https://trid.trb.org/view/882498
ER  - 

TY  - JOUR
AN  - 01120161
JO  - Public Roads
PB  - Federal Highway Administration
AU  - Shaw, Jeffrey
AU  - Moler, Steve
TI  - Bicyclist- and Pedestrian-Only Roundabouts
PY  - 2009/01
VL  - 72
IS  - 4
SP  - pp 2-9
AB  - Transportation agencies are designing roundabouts dedicated to bicycles and pedestrians, and sometimes bicycles only, on shared-use paths. This article describes the advantages of these roundabouts and highlights some examples of their implementation.  Shared-use paths and their associated roundabouts serve bicyclists, walkers, joggers, skaters -- virtually all nonvehicle traffic--and usually supplement on-road bicycle facilities.  Shared-use paths typically are located alongside riverbanks, oceanfronts, canals, abandoned or active railroad and utility rights-of-way, and limited-access freeways; on college and university campuses; and in parks and on connectors between parks. The roundabouts are particularly useful and effective when bicycle volumes are relatively high. Transportation agencies are building bicycle-pedestrian roundabouts on shared-use paths for the same reasons they build vehicle roundabouts on roads: improved safety and traffic flow. As with motor vehicle roundabouts, fewer conflicts occur on shared-use paths compared with traditional intersections.  In the absence of definitive guidelines, it is currently up to each individual designer to relate more general criteria to the detailed design necessary for a bicycle and pedestrian roundabout.  One option might be to apply standard engineering principles for traditional motor vehicle roundabouts and then adjust the designs based on the smaller size and slower speeds of bicycles. Another would be to perform tests involving pedestrians and bike users at roundabouts of different designs to help develop standards. The author suggests that it may be time to convene an effort to produce guidelines for bicycle-pedestrian-only roundabouts by bringing together the necessary expertise from roundabout designers, bicycle and pedestrian specialists, and trail and path planners. Whether on a college campus or other shared-use paths, the roundabout is an option that might minimize bicyclist and pedestrian conflicts and improve overall safety and mobility.
KW  - Bicycle facilities
KW  - Bikeways
KW  - Design methods
KW  - Pedestrian areas
KW  - Roundabouts
KW  - Shared use paths
UR  - http://www.fhwa.dot.gov/publications/publicroads/09janfeb/01.cfm
UR  - https://trid.trb.org/view/880426
ER  - 

TY  - RPRT
AN  - 01160590
AU  - Wall, Christopher J
AU  - Christenson, Richard E
AU  - McDonnell, Anne-Marie H
AU  - Jamalipour, Alireza
AU  - University of Connecticut, Storrs
AU  - Connecticut Department of Transportation
AU  - Federal Highway Administration
TI  - A Non-Intrusive Bridge Weigh-in-Motion System for a Single Span Steel Girder Bridge Using Only Strain Measurements
PY  - 2009//08//Research Report
SP  - 57p
AB  - This study proposes and demonstrates a non-intrusive Bridge Weigh-In-Motion (BWIM) methodology in a field study.  This methodology is for a single span steel girder bridge that uses only strain measurements of the steel girders beneath the bridge deck to determine the weight and accompanying characteristics of trucks traveling over the bridge.  A brief literature review of BWIM technology is presented, followed by a description of the proposed BWIM methodology.  The proposed methodology determines gross vehicle weight, speed, axle spacing, and axle weight in an automated fashion using only strain measurements.  A description is presented of the field study conducted to validate the proposed BWIM methodology.  The field study used both a test truck and trucks from the traffic stream to calibrate and compare the accuracy of the proposed BWIM methodology with static measurements of weight and axle spacing collected at a weigh station located one-half mile past the bridge.  The performance of the BWIM methodology is presented from a statistical perspective whereby the 95% confidence intervals are determined for the various errors in truck characteristic measurements.  The field study was made possible through the collaborative efforts of the Connecticut Department of Transportation, the Connecticut State Police, and the Federal Highway Administration.
KW  - Axle spacing
KW  - Axle weight
KW  - Data collection
KW  - Field studies
KW  - Girder bridges
KW  - Gross vehicle weight
KW  - Highway bridges
KW  - Methodology
KW  - Speed
KW  - Strain measurement
KW  - Weigh in motion
UR  - http://www.ct.gov/dot/LIB/dot/documents/dresearch/CT-2251-3-09-5.pdf
UR  - https://trid.trb.org/view/921552
ER  - 

TY  - RPRT
AN  - 01579225
AU  - Federal Highway Administration
TI  - Driving Simulation Forward: Making Driving Simulators More Useful for Behavioral Research
PY  - 2009///Program Fact Sheet
SP  - 2p
AB  - It is often difficult for highway and traffic engineers to consider complex driver behavior in their designs, but failing to do so can cost lives and, if roadways must be rebuilt, millions of dollars. The aim of “Making Driving Simulators More Useful for Behavioral Research,” an Exploratory Advanced Research (EAR) Program project, is to make driving simulators a more reliable tool for highway engineers. The 32-month study, launched by the Federal Highway Administration (FHWA) in 2009, is being conducted by the University of Iowa.
KW  - Behavior
KW  - Drivers
KW  - Driving simulators
KW  - Highway design
UR  - http://www.fhwa.dot.gov/advancedresearch/pubs/10060/10060.pdf
UR  - https://trid.trb.org/view/1371760
ER  - 

TY  - ABST
AN  - 01566295
TI  - Traffic Control Device Consortium Pooled Fund Study
AB  - The objective of this research is to evaluate innovative traffic control devices and disseminate the results for incorporation into the Manual on Uniform Traffic Control Devices (MUTCD). A consortium of State, regional, and local entities, Federal Highway Administration (FHWA), and other partners will work in conjunction with the Human Centered Systems Laboratories on this task.
KW  - Laboratory tests
KW  - Manual on Uniform Traffic Control Devices
KW  - Research projects
KW  - Traffic control centers
KW  - Traffic control devices
KW  - Workshops
UR  - https://trid.trb.org/view/1357472
ER  - 

TY  - RPRT
AN  - 01541509
AU  - Federal Highway Administration
TI  - Real Estate Acquisition Guide For Local Public Agencies
PY  - 2009
SP  - 168p
AB  - This guide is intended to serve as a basic reference for local public agencies and others who receive Federal-aid highway funds for projects involving the acquisition of real property. Typically, the Federal Highway Administration (FHWA) provides funds to State governments who carry out highway projects. These funds are used to support activities related to building, improving, and maintaining designated public roads. In some circumstances, the States pass on the funds to local governments or private entities. Eligibility to receive Federal funds depends upon compliance with Federal laws, regulations,  and policies. State and local governments often have additional requirements that apply. Chapters include: The Uniform Act and the Government-wide Regulation, Project Development, Administrative Matters, Valuation, Acquisition, Relocation Assistance, and Property Management.
KW  - Federal government
KW  - Local government agencies
KW  - Property acquisition
KW  - Property management
KW  - Real property
KW  - Regulations
KW  - Relocation assistance
KW  - Uniform Relocation Assistance and Real Property Acquisition Act
KW  - Valuation
UR  - http://www.fhwa.dot.gov/real_estate/uniform_act/program_administration/lpa_guide/reag.pdf
UR  - https://trid.trb.org/view/1326377
ER  - 

TY  - RPRT
AN  - 01510958
AU  - United States Federal Highway Administration
TI  - Interstate 74 Quad Cities corridor study, Scott County, Iowa and Rock Island County, Illinois : environmental impact statement
PY  - 2009///Volumes held: Draft, Dapp, Final
KW  - Environmental impact statements
UR  - https://trid.trb.org/view/1295282
ER  - 

TY  - CONF
AN  - 01483909
AU  - Santero, Nicholas J
AU  - Harvey, John T
AU  - Kohler, Erwin
AU  - Farnbach, Bill
AU  - Federal Highway Administration
TI  - Life Cycle Cost Analysis of Dowel Bar Retrofit
PY  - 2009
SP  - pp 183-206
AB  - This report presents the results of a Life Cycle Cost Analysis (LCCA) project comparing dowel bar retrofit (DBR) with grinding and asphalt overlay. The performance assumptions were based on observed performance in the field and under heavy-vehicle simulator loading. Costs were collected from industry and California Department of Transportation (Caltrans) construction cost records. The analysis assumed the typical Caltrans practice of using nighttime closures to minimize road user delay. The analysis was performed using Caltrans LCCA procedures based on use of the Federal Highway Administration’s (FHWA’s) software RealCost. This study used a 40-year analysis period. Sensitivity analysis was performed considering these variables: (1) Initial remaining life: this takes into account the structural condition of the pavement that is a candidate for DBR. The analysis considered 10, 20, and 30 years of expected fatigue life remaining. (2) Grinding life: this captures scenarios for the interval between grinding in the absence of DBR. The analysis considered 10, 12, 15, 17, and 20 years. (3) User cost variables: these include traffic growth, closure details (time of day/week, number of lanes affected) and traffic distribution (rural versus urban, percentage of trucks). For this analysis, all closures were considered to be on weeknights from 10:00 p.m. to 6:00 a.m. and to affect only one lane of traffic. The chosen annual growth rate was 1.5%. (4) DBR performance: to account for the uncertain maintenance cost of DBR (due to failed backfill material) analyses in this study were run using a failure rate of 0%, 3%, and 6% per year. Results were also produced for the cases of plus/minus 10% from the expected DBR initial cost. (5) Discount rate: a discount rate of 4% for LCCA was used, as typically is done by Caltrans. The comparison was based on a 5-mi (8-km) rural stretch of highway with an initial annual average daily traffic load of 38,500 vehicles, 24% of which were trucks, loosely based on a DBR site on Route 99 in Kern County. The final results of the LCCA are relatively unaffected by the details of the case study. The analysis considers the possibility of additional fatigue life from DBR. Although the Mechanistic-Empirical Pavement Design Guide does not show increased transverse fatigue life from DBR, RadiCal predicts increased longitudinal fatigue life. Longitudinal cracking is common in dry western environments.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Bituminous overlays
KW  - California
KW  - Concrete pavements
KW  - Diamond grinding
KW  - Dowel bar retrofit
KW  - Fatigue cracking
KW  - Life cycle costing
KW  - Pavement maintenance
KW  - Rehabilitation (Maintenance)
KW  - Sensitivity analysis
UR  - https://trid.trb.org/view/1252523
ER  - 

TY  - CONF
AN  - 01483908
AU  - Rawool, Shubham
AU  - Stubstad, Richard
AU  - Federal Highway Administration
TI  - Effect of Diamond Grinding on Noise Characteristics of Concrete Pavements in California
PY  - 2009
SP  - pp 235-247
AB  - The construction of sound walls along highways has been the primary noise mitigation strategy  in California and in many other western States. Sound walls cost approximately $1.5 million  per mile and are effective only in close proximity to the highway, on the “far” side of the sound  wall, so to speak. In its efforts to explore other noise mitigation strategies, the California Department of Transportation (Caltrans) recently conducted a study to determine the effect of diamond grinding on  the noise characteristics of existing concrete pavements. Since the noise generated at the tire– pavement interface is the greatest contributor to highway noise, quieter pavement surfaces can  reduce overall noise levels for both road users and neighborhoods—whether sound walls are  used or not. On-board sound intensity (OBSI) measurements were conducted on six routes in California, for a total of 42 evaluation sections; each evaluation section was 440 ft (136.8 m) long. OBSI measurements before and after diamond grinding were recorded. Following are the overall conclusions that were reached after the pre- and post-grinding OBSI levels were measured: (1) There is a significant and readily audible reduction in OBSI levels (and hence in tire–pavement noise) after grinding. (2) An average 2.7 dBA reduction in OBSI levels was observed for all test sites. (3) Among the six routes, the highest average reduction of 4.4 dBA was observed on I-5 near Richards Boulevard in Sacramento County, and the lowest reduction of 1.2 dBA was observed on State Route 60 (on a single test section) in San Bernardino County. (4) The highest reductions in sound intensity levels on a 1/3-octave band basis occurred in the 1600 Hz band, while the lowest reductions occurred in the 1000 Hz bandwidth.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Before and after studies
KW  - California
KW  - Concrete pavements
KW  - Diamond grinding
KW  - On Board Sound Intensity
KW  - Tire/pavement noise
UR  - https://trid.trb.org/view/1252553
ER  - 

TY  - CONF
AN  - 01483907
AU  - Scofield, Larry
AU  - Federal Highway Administration
TI  - Development of the Next-Generation, Low-Maintenance Concrete Surface
PY  - 2009
SP  - pp 269-286
AB  - In 2005, the Portland Cement Association, through the American Concrete Pavement Association, funded research to improve the noise performance of concrete pavements. The International Grooving and Grinding Association, through its affiliated contractors, supported the research effort through equipment development and test section construction. The research was undertaken by Purdue University’s Herrick Laboratories using their Tire Pavement Test Apparatus (TPTA). The TPTA is capable of testing any pavement texture that can be produced. This allows evaluation of texture designs that are not constrained by current construction capabilities or costs associated with construction and evaluation of field test sections. More importantly, the TPTA allows evaluation of textures without causing traffic control or safety issues. Purdue’s concrete pavement research was targeted on both new construction and pavement rehabilitation. Purdue’s preliminary efforts focused on evaluation of the variables affecting tire–pavement noise generation characteristics of diamond-ground surfaces. This paper reports on the development and findings of that work. The Purdue work evaluated the variables affecting construction of diamond-ground textures  and the joint-slab effect associated with transverse joint noise generation. The findings of the  Purdue work indicated that the geometric configuration of the blades and spacers used to construct diamond-ground textures was not the controlling factor in noise generation; rather the  resulting fin profile was the most important factor. To produce a low-noise, diamond-ground  surface required producing uniform and consistent fin profiles.  To verify this finding, a new surface was produced that consisted of a uniform fin profile design with essentially only negative texture. This surface texture produced the lowest tire– pavement noise levels in the research. The surface was then constructed in the field using actual  diamond-grinding equipment to confirm the laboratory based study. A new surface, now called  the Next Generation Concrete Surface (NGCS), was essentially implemented and is being constructed in test sections to evaluate its long-term performance.  NGCS is a term used to describe a category of textures that have evolved or will evolve  through current research. The term may apply to several textures that evolve for both new construction and rehabilitation of existing surfaces. The desirable characteristics of such textures  will be a very smooth profile coupled with good micro texture and excellent macro texture. To date, three field trials have been constructed and one competitively bid construction project.  Friction testing and on-board sound intensity levels have been obtained at two of the sites and  are reported herein.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Concrete pavements
KW  - Diamond grinding
KW  - Friction tests
KW  - Next Generation Concrete Surface Program
KW  - On Board Sound Intensity
KW  - Texture
KW  - Tire/pavement noise
UR  - https://trid.trb.org/view/1252555
ER  - 

TY  - CONF
AN  - 01483906
AU  - Frentress, Daniel P
AU  - Federal Highway Administration
TI  - Finding Buried Treasure With Diamond Grinding of a Concrete Pavement 
After Removal of an Asphalt Overlay
PY  - 2009
SP  - pp 249-268
AB  - Many times in the past, an agency has covered a sound concrete pavement with an asphalt overlay to improve the ride which may have been a cost-effective solution, but with the recent increase in asphalt prices, the mill-and-overlay option is becoming too expensive. Current diamond-grinding prices can be half the cost of an asphalt overlay and if the old concrete is still structurally functional, then diamond grinding becomes a cost-effective solution and allows for the recycling of the asphalt millings for future asphalt projects. This paper presents a case study of an actual project under construction that is scheduled to be completed in spring 2009. The area in question is a diamond-grinding project of underlying concrete pavement that took place after the removal of the existing asphalt overlay. The paper describes the selection process that the New Jersey Department of Transportation used to  design and undertake this project as well as the construction issues related to completing the work on a night-only (Monday through Saturday) construction schedule. The diamond-grinding contractor asked that the asphalt milling machines not cut into the concrete pavement, which means that some asphalt is being removed by the diamond-grinding equipment while profiling the old concrete pavement to a satisfactory ride. The project is located on Highway 21 on the north side of Newark, New Jersey. Crisdel Group, Inc., of South Plainfield, New Jersey, is the prime contractor and Interstate Improvement, Inc., of Faribault, Minnesota, is the diamond-grinding subcontractor.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Bituminous overlays
KW  - Case studies
KW  - Concrete pavements
KW  - Construction management
KW  - Construction scheduling
KW  - Diamond grinding
KW  - New Jersey Department of Transportation
KW  - Newark (New Jersey)
KW  - Rehabilitation (Maintenance)
KW  - Ride quality
UR  - https://trid.trb.org/view/1252554
ER  - 

TY  - CONF
AN  - 01483904
AU  - Weiss, Charles A
AU  - Morefield, Sean W
AU  - Malone, Philip G
AU  - Koenigstein, Michael L
AU  - Federal Highway Administration
TI  - Use of Vitreous-Ceramic Coatings on Reinforcing Steel for Pavements
PY  - 2009
SP  - pp 349-358
AB  - An innovative vitreous-ceramic coating for reinforcing steel that incorporates reactive calcium  silicates from portland cement in an alkali-resistant glass has been shown both to increase the bond between the concrete to the reinforcing steel and to protect the steel from corrosion. The new enamel coating eliminates the weak layer that is associated with the interface between the steel and surrounding concrete. The vitreous coating is applied to the steel using the same process involved in porcelain enameling. In applying the enamel, the rod is coated with a porcelain slip containing portland cement and heated to approximately 1,562 °F (850 °C) for 5 to 10 minutes to allow the molten glass to fuse to the surface of the iron and the portland-cement component to become bonded to and embedded in the glass. The result is a tough, abrasion-resistant, hermetically-tight coating that develops the adhering properties of a portland-cement paste when contacted by fresh concrete.  Bleed water from the fresh concrete that normally produces a weak interfacial transition zone is  taken up by the hydration of the surface layer of reactive calcium silicate. After only 7 days of  curing, the chemical bond that forms is typically three to four times greater than that observed at the surface of undeformed, bare steel. The bond from the coated steel is as strong as the bonds between cement grains in the curing concrete. The lack of a weak interface results in the bond strength at the surface of the reinforcement increasing and not decreasing as the surrounding concrete cures and shrinks. If microcracks develop in the coating, unreacted cement grains embedded in the glass coating  will hydrate, forming calcium silicate hydrate gel, and raise the alkalinity. The self-healing effect in the glassy layer helps to protect the underlying steel. In the construction of concrete pavement, the reactive, vitreous ceramic coating may permit shorter splices. The coating can also help insure that the shrinkage fractures that develop in pavement during curing remain within the desired tolerance limits. Since porcelain enamel does not delaminate, capillary transport under the coating does not occur. Porcelain enamels are considered the most durable and chemically-resistant coatings that can be put on steel. They can provide protection even in aggressive, high-chloride environments such as salt-treated pavement.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Bond strength (Materials)
KW  - Ceramic coatings
KW  - Corrosion tests
KW  - Portland cement
KW  - Reinforced concrete pavements
KW  - Reinforcing steel
UR  - https://trid.trb.org/view/1252560
ER  - 

TY  - CONF
AN  - 01483902
AU  - Ramseyer, Chris
AU  - Perez, Vincent
AU  - Federal Highway Administration
TI  - Highway Panel Replacement—CSA Concrete in California
PY  - 2009
SP  - pp 223-232
AB  - The last 10 years have seen considerable growth in the use of proprietary and special repair cements for concrete pavements. Many of these products lend themselves to “fast track” construction techniques that allow reopening to traffic within 12 hours or less. These products achieve high early strengths by accelerating the portland cement hydration process for both Type I and Type III cements or through alternative cementitious reactions that include alkali-activated aluminosilicate cements, sulfoaluminate based cements, or magnesium phosphate cements. These products are typically labeled as “cementitious” because their chemical reactions are inorganic, unlike the organic chemical reactions fundamental to epoxies and polymeric concretes. Unfortunately, most of these products are difficult to work with or uneconomical. The perfect material for highway panel replacement would be (1) cost effective, (2) easy to work with, and (3) have very early strength for early opening to traffic. The time required for a concrete mixture to achieve a minimum compressive strength influences the timing of opening a repaired road to service. Zia et al. applied a criterion for a minimum compressive strength of 13.8 MPa (2,000 lbf/in2) in 6 hours for very early strength (VES) high-performance  concrete. This paper discusses the use of a VES calcium sulfoaluminate concrete to meet these  challenges and its use in the State of California.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Alternatives analysis
KW  - Calcium sulfoaluminate cements
KW  - California
KW  - Compressive strength
KW  - Costs
KW  - Panels
KW  - Pavement maintenance
KW  - Rehabilitation (Maintenance)
KW  - Very early strength concrete
UR  - https://trid.trb.org/view/1252552
ER  - 

TY  - CONF
AN  - 01483901
AU  - Lee, Eul-Bum
AU  - Lim, Seungwook
AU  - Hartog, Jonathan C
AU  - Thomas, David K
AU  - Federal Highway Administration
TI  - I-15 Ontario Project: Technology Implementation for Accelerated Concrete Pavement Rehabilitation
PY  - 2009
SP  - pp 303-316
AB  - As highway agencies across the country attempt to balance rebuilding existing highways, reducing congestion and user delays, and improving safety, the use of accelerated highway rehabilitation methods has become a necessity. This has been the case for the California Department of Transportation (Caltrans), which recently undertook a major concrete pavement rehabilitation project on Interstate-15 near the city of Ontario, California. The I-15 Ontario Corridor carries about 200,000  average daily traffic with 4-6 lanes each direction, about 6% of which is heavy trucks during peak hours. The size of the project is approximately $86 million in the engineer’s estimate cost. Construction is scheduled to start February 2009 and to be completed by April 2010. The major scope of the project is the replacement of concrete pavement on two outside lanes in both directions along the 7.5-km (4.7-mi) stretch. Due to a complexity of construction access and the rehabilitation process, the project was designed to implement various types of concrete pavement rehabilitation methods. Basically, the old concrete pavement will be replaced with one of: (1) normal portland cement concrete (28-day curing-time mix); (2) rapid strength concrete (12-hour curing-time mix); (3) fast-setting hydraulic cement concrete (4-hour curing-time mix); or (4) precast concrete panel. Construction scheduling and analysis program Construction Analysis for Pavement Rehabilitation Strategies (CA4PRS) was used to demonstrate that the combination of rehabilitation methods was the most cost-effective strategy to shorten construction duration, minimize lane closure impact, and achieve longer-life pavement design. To take advantage of unique experimental technologies being adopted on the I-15 Ontario Project, Caltrans plans to conduct field monitoring studies with the Federal Highway Administration (FHWA) and University of California, Berkeley researchers to compare rehabilitation process and progress, and work-zone traffic impact between the design and material types.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - CA4PRS (Computer model)
KW  - Concrete pavements
KW  - Cost effectiveness
KW  - Interstate 15
KW  - Ontario (California)
KW  - Pavement maintenance
KW  - Portland cement concrete
KW  - Precast concrete
KW  - Rehabilitation (Maintenance)
KW  - Technological innovations
UR  - https://trid.trb.org/view/1252557
ER  - 

TY  - CONF
AN  - 01483900
AU  - Tayabji, Shiraz
AU  - Buch, Neeraj
AU  - Kohler, Erwin
AU  - Federal Highway Administration
TI  - Precast Concrete Pavement for Intermittent Concrete Pavement Repair Applications
PY  - 2009
SP  - pp 317-334
AB  - Precast pavement systems are fabricated or assembled off-site, transported to the project site, and installed on a prepared foundation (existing pavement or re-graded foundation). The system components require minimal field curing time to achieve strength before opening to traffic. These systems are primarily used for rapid repair, rehabilitation, and reconstruction of asphalt and portland  cement concrete (PCC) pavements in high-volume-traffic roadways. Recognizing the need for effective, rapid rehabilitation methods, the Federal Highway Administration, through its Concrete Pavement Technology Program, and several United States and Canadian highway agencies have initiated programs to investigate the feasibility of using precast concrete for pavement repair and rehabilitation. Parallel to agencies’ efforts, several organizations in the U.S. also initiated independent development activities to refine precast concrete pavement technologies. These technologies have certain proprietary features and require licensing for product use. The Strategic Highway Research Program 2, as part of its rapid highway renewal focus area, has sponsored a study (begun in early 2008) to advance modular/precast pavement technologies to enable cost-effective rapid repair and rehabilitation of pavements in high-volume traffic areas. This paper provides a summary of current initiatives related to precast pavement technology for intermittent repair of concrete pavements and provides a framework for advancing the technology in future years.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Concrete pavements
KW  - Cost effectiveness
KW  - Pavement maintenance
KW  - Precast concrete pavements
KW  - Rehabilitation (Maintenance)
KW  - Repairing
KW  - State of the practice
UR  - https://trid.trb.org/view/1252558
ER  - 

TY  - CONF
AN  - 01483899
AU  - Pierce, Linda M
AU  - Federal Highway Administration
TI  - Load Transfer Restoration—A Survey of Current Practice and Experience
PY  - 2009
SP  - pp 207-222
AB  - The concept of restoring load transfer in existing concrete pavements through the installation of  mechanical devices at transverse joints or cracks began in the United States in the early 1980s.  A number of devices have been evaluated for their effectiveness in restoring load transfer and  reducing the return of joint faulting. Dowel bar retrofit has been shown to be effective in restoring load transfer and minimizing the return of faulting. This paper focuses on the specifications, construction, and performance aspects of dowel bar retrofit.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Best practices
KW  - Concrete pavements
KW  - Dowel bar retrofit
KW  - Load transfer
KW  - Pavement joints
KW  - Pavement performance
KW  - Rehabilitation (Maintenance)
KW  - United States
UR  - https://trid.trb.org/view/1252550
ER  - 

TY  - CONF
AN  - 01483898
AU  - Burnham, Thomas
AU  - Izevbekhai, Bernard
AU  - Federal Highway Administration
TI  - Retrofit Dowel Bars in Jointed Concrete Pavement—Long-Term Performance and Best Practices
PY  - 2009
SP  - pp 161-181
AB  - As jointed concrete pavements age, they typically experience panel cracking, joint or crack faulting, and surface distress. To maintain user satisfaction and safety, the agency or owner must identify the causes of the distress and consider types of feasible repairs, if any. These repairs range from partial to full-depth concrete repairs for spalled or cracked panels, to load-transfer and ride-quality restoration schemes for faulted cracks and joints. Retrofitting dowel bars into a distressed and faulted concrete pavement has become a proven technique for restoring or improving the capacity of jointed concrete pavements. The backfill materials and installation techniques used in retrofitting dowel bars must, however, be carefully designed. Numerous field and laboratory trials have been carried out in Minnesota in the recent past, allowing engineers and contractors to refine the installation techniques  and materials necessary to produce long-lasting and effective projects. This paper provides a  history of the development of best practices for retrofitting dowel bars into jointed concrete  pavements located in the extreme climate of Minnesota. The performance of field test sections, up to 13 years old, are discussed in relation to dowel bar location, long-term load-transfer capability, and durability of backfill materials. Implemented design changes based on results from accelerated loading laboratory studies are discussed. An effective installation method and materials testing process, required of contractors before constructing retrofit projects in Minnesota, is described. Retrofit dowel bar installation, in conjunction with restoration of the surface through diamond grinding, has been proven to significantly extend the capacity and serviceable life of many concrete pavements in  Minnesota.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Best practices
KW  - Concrete pavements
KW  - Dowel bar retrofit
KW  - Durability
KW  - Field tests
KW  - Load transfer
KW  - Minnesota
KW  - Pavement joints
KW  - Rehabilitation (Maintenance)
KW  - Repairing
UR  - https://trid.trb.org/view/1252522
ER  - 

TY  - CONF
AN  - 01483897
AU  - Kohler, Erwin
AU  - Motumah, Linus
AU  - Rymer, Bruce
AU  - Harvey, John
AU  - Federal Highway Administration
TI  - Tire–Pavement Noise Results From California PCCP and HMA Pavements
PY  - 2009
SP  - pp 287-299
AB  - Traffic noise generated by tire–pavement interaction is a matter of major concern for the California Department of Transportation (Caltrans). Research is underway in California and other States to evaluate tire–pavement noise characteristics of both concrete and asphalt pavements using the on-board sound intensity (OBSI) method, which allows for detailed characterization of noise levels at the source. In California, both concrete and asphalt pavement research studies are being conducted by the University of California Pavement Research Center (UCPRC) in collaboration with and funding from Caltrans. The concrete pavements and bridge decks study involves a total of 144 sections in different regions throughout the State. The surface textures evaluated in the study are longitudinal tining, diamond grinding, diamond grooving, and burlap drag. Preliminary results indicate that diamond-ground surfaces can be the quietest of the concrete pavement surface textures. With only part of the test sections analyzed, OBSI levels from California concrete pavements range between 101.2 and 107.3 dB(A). The asphalt pavement research evaluates tire–pavement noise characteristics and performance properties of about 70 sections from throughout the State. This study considers acoustic and structural performance of four main asphalt surface types: open-graded asphalt concrete (OGAC), rubberized open-graded asphalt concrete (RAC-O), rubberized gap-graded asphalt concrete (RAC-G) and dense-graded asphalt concrete (DGAC). OBSI measurements indicate that average noise levels increased by 1.3 dB(A) from 100.8 dB(A) to 102.1 dB(A) over the 2-year period. Overall, a  noise level of around 100.0 dB(A) measured at 60 mi/h (96 km/h) using the OBSI method appears to be a reasonable goal for both concrete and asphalt quieter pavements, based on the UCPRC data and other studies. Further analysis on the data being collected will answer questions about acoustic durability of different types of concrete and asphalt pavements.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Acoustic properties
KW  - Asphalt concrete pavements
KW  - Asphalt rubber
KW  - Bridge decks
KW  - California
KW  - Hot mix asphalt
KW  - On Board Sound Intensity
KW  - Portland cement concrete
KW  - Texture
KW  - Tire/pavement noise
UR  - https://trid.trb.org/view/1252556
ER  - 

TY  - CONF
AN  - 01483896
AU  - Hossain, Shabbir
AU  - Ozyildirim, Celik
AU  - Federal Highway Administration
TI  - Evaluation of Concrete Pavement Repair Using Precast Technology in Virginia
PY  - 2009
SP  - pp 335-348
AB  - The Virginia Transportation Research Council has recently evaluated the use of precast concrete patches for repairing jointed concrete pavement in Virginia. Six patches were placed: three had dowels cast into them during fabrication, and three had dowels inserted in place (dowel bar retrofit). Fabrication and placement were documented. The load transfer efficiency at the joints and the ride quality were determined approximately 2 weeks after construction. After 1.5 years, the general condition of the patches was determined by a visual survey for cracks and spalls. In general, there were no distresses on the replaced slabs except for a few hairline cracks; however, there were failures in the joint area, mainly because of dowels, that were attributed to poor construction practices. The Virginia Department of Transportation has planned another demonstration project in cooperation with the Federal Highway Administration’s Highways for LIFE program for precast  prestressed concrete pavement rehabilitation. This new project will include precast, precast  prestressed, and cast-in-place slabs. This paper summarizes the past work, the difficulties experienced, and the improvements that will be incorporated in the new project.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Concrete pavements
KW  - Dowel bar retrofit
KW  - Load transfer
KW  - Patching
KW  - Pavement distress
KW  - Pavement joints
KW  - Pavement maintenance
KW  - Precast concrete
KW  - Ride quality
KW  - Virginia
UR  - https://trid.trb.org/view/1252559
ER  - 

TY  - CONF
AN  - 01483837
AU  - Grove, Jim
AU  - Cable, Jim
AU  - Taylor, Peter
AU  - Federal Highway Administration
TI  - Concrete Pavement Patching—Simpler Can Be Better
PY  - 2009
SP  - pp 31-40
AB  - Repair of concrete pavements includes both partial- and full-depth patching of distressed areas of the slab. Full-depth patching is a small subset of concrete paving and has a number of unique features. This is the focus of this paper. Unfortunately, many agencies approach patch design and construction from the mindset of conventional concrete paving, resulting in a number of unique properties of a patch repair being overlooked. Too often, patches do not perform well, and often the cause of failure can be traced back to procedures that are not appropriate for the patching operation. In this paper, several of those paving paradigms are discussed with reasons why they may be working against the long-term durability of the patch. Also, those aspects that are unique to patching are discussed and despite the best of intentions, may be the reason why patches are not performing as intended. This is a practical, application paper based on over 50 years of combined experience by the authors in the area of concrete pavement construction. Research is cited to support the ideas presented. The goals of the recommendations are to provide a highway agency with a method for patching concrete pavement that reduces the time required, allows lower opening strength, reduces cost, and results in a patch with a long life.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Concrete pavements
KW  - Design
KW  - Patching
KW  - Pavement maintenance
KW  - Pavement performance
KW  - Repairing
UR  - https://trid.trb.org/view/1252540
ER  - 

TY  - CONF
AN  - 01483835
AU  - Jung, Youn Su
AU  - Zollinger, Dan G
AU  - Freeman, Thomas J
AU  - Federal Highway Administration
TI  - Evaluation and Decision Strategies for the Routine Maintenance of Concrete Pavement
PY  - 2009
SP  - pp 117-132
AB  - This paper is to provide assistance for the pavement evaluation and selection of method of repair for routine maintenance relative to the extension of service life. The visual identification of various distress types is discussed, and evaluation techniques using nondestructive testing are introduced that are key to determining proper routine maintenance activities. According to the areas selected from the simplified checklist of visual distress types, ground penetration radar for detecting voids below the slab and the presence of trapped water, falling weight deflectometer for structural condition evaluation, and dynamic cone penetrometer for estimating the in situ strength of base and subgrade soils are used to provide current information on pavement condition for selection of needed repair methods using a simple, systematic decision process. During field investigations, poorly performing areas were identified and possible fixes determined as a means of guideline development. Key routine maintenance activities are categorized in five levels; performance monitoring, preservative, functional concrete pavement repair (CPR), structural CPR, and remove and replace. Each level of maintenance is arranged for the use of repair treatments in a consistent, logical framework to ensure their effective and timely use and employment. Since the decision process is focused on monitoring the early stages of deterioration, it should result in more cost effective maintenance programs.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Concrete pavements
KW  - Decision making
KW  - Maintenance practices
KW  - Nondestructive tests
KW  - Pavement distress
KW  - Pavement maintenance
KW  - Repairing
UR  - https://trid.trb.org/view/1252561
ER  - 

TY  - CONF
AN  - 01483834
AU  - Darter, Michael I
AU  - Mallela, Jag
AU  - Titus-Glover, Leslie
AU  - Federal Highway Administration
TI  - Impact of Existing Pavement on Jointed Plain Concrete Overlay Design and Performance
PY  - 2009
SP  - pp 15-30
AB  - Concrete overlays are increasingly being constructed over deteriorated existing asphalt and concrete pavements. Designers struggle to consider the extent of deterioration of the existing pavement in the design of the concrete overlay. This paper addresses the impact of the level of condition of the existing pavement on the performance of the concrete overlay. Use is made of the new AASHTO Interim Mechanistic-Empirical Pavement Design Guide to simulate two case studies over a range of conditions and designs. Significant findings were obtained to help guide designers to better consider the condition of the existing pavement in their design.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Concrete overlays
KW  - Condition surveys
KW  - Jointed plain concrete pavements
KW  - Mechanistic-Empirical Pavement Design Guide
KW  - Pavement design
KW  - Pavement performance
UR  - https://trid.trb.org/view/1252539
ER  - 

TY  - CONF
AN  - 01483833
AU  - White, Craig
AU  - Hein, David K
AU  - Federal Highway Administration
TI  - Optimization of Concrete Maintenance to Extend Pavement Service Life
PY  - 2009
SP  - pp 101-115
AB  - The Highway 407 ETR concession in Ontario, Canada, is responsible for the management of a large highway network for a period of 99 years. As a part of that concession, 407 ETR manages over 600 lane-km (373 lane-mi) of exposed concrete highway. 407 ETR has a very active pavement maintenance and preservation program to maximize the life of the pavement. Also, as a private-sector concession, 407 ETR has the ability to act very quickly and actively partner with industry to promote innovation and to avoid the pitfalls of low-bid procurement. 407 ETR has an active pavement management and maintenance management system that is used for future needs planning but, more importantly, is also used to identify maintenance and rehabilitation needs early in their development so that they can be addressed using a less expensive preventive maintenance program. It is in the best interest of the concession to maximize the life of the pavement, to provide a high-quality riding surface for the paying public, and to avoid disruptions to traffic flow and revenue. To accomplish this, 407 ETR has employed many maintenance techniques including slab stitching, dowel bar retrofit, joint retrofit, diamond grinding, shot blasting, longitudinal grooving, underslab sealing and lifting, targeted slab replacement, microsurfacing, and other proprietary thin asphalt surfacings. This paper reviews each of the concrete pavement maintenance and repair techniques used by 407 ETR over the past 10 years, discusses their performance, provides guidance on “what to do and what not to do” aspects of their use, and compares their life-cycle benefits.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Concrete pavements
KW  - Maintenance management
KW  - Maintenance practices
KW  - Ontario (Province)
KW  - Optimization
KW  - Pavement maintenance
KW  - Pavement management systems
KW  - Preservation
KW  - Rehabilitation (Maintenance)
KW  - Repairing
KW  - Service life
UR  - https://trid.trb.org/view/1252549
ER  - 

TY  - CONF
AN  - 01483831
AU  - Chen, Dar-Hao
AU  - Won, Moon
AU  - Scullion, Tom
AU  - Bilyeu, John
AU  - Federal Highway Administration
TI  - Minimizing Reflective Cracking With Applications of the Rolling Dynamic Deflectometer and Overlay Tester
PY  - 2009
SP  - pp 3-13
AB  - Since reflective cracking is related to both the existing pavement condition and the properties of the overlay material, quantitative methods are required to assess both the vertical movements of the cracks (or joints) for the entire project and the reflection cracking resistance of the overlay material. Since 2000, the rolling dynamic deflectometer (RDD) has been used in Texas to provide 100 percent coverage of existing joint conditions of concrete pavements being considered for asphalt overlays. The RDD assesses the vertical movements of each joint and identifies the weak support areas and locations where the slabs are rocking. The continuous deflection profiles produced are used to locate areas with high potential for reflective cracking due to poor load transfer and high slab movements. The overlay tester (OT) has been developed as a mix design tool to characterize the ability of an asphalt mix to resist reflective cracking. OT results have not yet been integrated with RDD results to predict the exact extent of reflective cracking that will occur. However, OT results are still good for ranking various mixtures in terms of crack performance, and some guidelines based on OT and RDD results have been developed. This paper presents a series of case studies illustrating the relationship between the RDD deflection profiles, the OT results of the asphalt mixes, and the resulting field performance. On IH-20 experimental sections in northeast Texas, the RDD identified many locations that have high potential for reflective cracking. The mix used on this project was found to have poor crack resistance and failed the overlay test quickly (2 cycles). Major reflection cracking problems were encountered on this project. At another project, SH-12 in the Beaumont District, no visible cracks have been observed after 2 years of service, despite significant movement detected by RDD. The main reason for the good performance on SH-12 is believed to be due to the thick and flexible overlay mix (the mix lasted more than 900 cycles in the OT). On a section of US-96 in the Beaumont District, the RDD determined that the pavement had good load transfer efficiency across the cracks, and consequently was at low risk of reflection cracking, even though the surface condition was poor, with severe transverse cracks and spalling. A stone matrix asphalt mix with OT life exceeding 700 cycles was placed 5 years ago, and performance to date has been excellent. Based on these case studies, TxDOT has developed criteria for interpreting the RDD deflection data and for defining the required properties of asphalt overlays to provide good performance.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Bituminous overlays
KW  - Deflection
KW  - Deflectometers
KW  - Mix design
KW  - Overlay tester
KW  - Pavement joints
KW  - Pavement performance
KW  - Reflection cracking
KW  - Rolling dynamic deflectometers
KW  - Texas
UR  - https://trid.trb.org/view/1252538
ER  - 

TY  - CONF
AN  - 01483828
AU  - Tayabji, Shiraz
AU  - Gisi, Andrew
AU  - Blomberg, Jason
AU  - DeGraaf, Dan
AU  - Federal Highway Administration
TI  - New Applications for Thin Concrete Overlays: Three Case Studies
PY  - 2009
SP  - pp 87-99
AB  - The need for optimizing preservation and rehabilitation strategies used to maintain the Nation’s highway pavements has never been greater. Concrete overlays have a long history of use to preserve and rehabilitate concrete and asphalt pavements, and many of the practices are well established. However, of recent origin are techniques that use thinner concrete overlays with shorter joint spacing. Field experience over more than 15 years with the thinner concrete overlays under a range of traffic and site conditions has demonstrated their viability as a cost-effective solution to extend the service life of deteriorated asphalt and concrete pavements. Concrete overlays can be designed for a range of traffic loadings to provide long performance lives, 15 to 40+ years, and to meet specific needs. Well-designed and well-constructed concrete overlays require low maintenance and can have low life-cycle costs. Thin concrete overlay applications include bonded and unbonded overlays over existing asphalt, concrete, and composite pavements. This paper provides a review of thin concrete overlays applied as bonded or unbonded overlays. In addition, three recent case studies are presented that illustrate the wide range of applications of thin concrete overlays.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Asphalt pavements
KW  - Concrete overlays
KW  - Concrete pavements
KW  - Cost effectiveness
KW  - Pavement maintenance
KW  - Preservation
KW  - Rehabilitation (Maintenance)
KW  - Service life
KW  - Thin overlays
UR  - https://trid.trb.org/view/1252547
ER  - 

TY  - CONF
AN  - 01483827
AU  - Pierce, Linda M
AU  - Uhlmeyer, Jeff S
AU  - Weston, Jim
AU  - Anderson, Keith W
AU  - Federal Highway Administration
TI  - Forensic Evaluation of Cracking in Panels Adjacent to Panel Replacements on Interstate 5 in Washington State
PY  - 2009
SP  - pp 41-51
AB  - In 2003 the Washington State Department of Transportation (WSDOT) conducted pavement rehabilitation (dowel bar retrofit, diamond grinding and panel replacements) on a 42-year-old plain jointed concrete pavement that was 9 in. (230 mm) thick. Within 5 months of construction, maintenance forces had placed temporary patches at six locations along the project length; by spring of 2005 the number of distressed locations had increased to 35 and by June 2006, construction estimates to replace the deficient panels ranged from $3.5 to $ 7.6 million. This paper summarizes the forensic investigation that ensued due to the rapid failure of the concrete pavement on this project. Though there appears to be no single cause of the rapid increase in panel cracking, the investigation identified a number of possible contributors that include: panel demolition/excavation methods, dowel bar drilling operations, construction equipment operating on panels supported by weak base or subgrade materials and dowel bar misalignment.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Cracking of concrete pavements
KW  - Evaluation
KW  - Jointed plain concrete pavements
KW  - Pavement distress
KW  - Pavement maintenance
KW  - Pavement performance
KW  - Washington (State)
UR  - https://trid.trb.org/view/1252542
ER  - 

TY  - CONF
AN  - 01483825
AU  - Shatnawi, Shakir
AU  - Stroup-Gardiner, Mary
AU  - Stubstad, Richard
AU  - Federal Highway Administration
TI  - California’s Perspective on Concrete Pavement Preservation
PY  - 2009
SP  - pp 71-86
AB  - The California Department of Transportation (Caltrans) has established a strong pavement preservation program to preserve existing pavements and delay rehabilitation. To implement this effort, Caltrans developed a 5-year pavement preservation plan with dedicated funding and established the Pavement Preservation Task Group (PPTG) consisting of over 22 subgroups, several of which apply to concrete pavement preservation specifically. The PPTG works as an advisory body to the California Pavement Preservation (CP2) Center located at the California State University in Chico. This paper describes the major pavement preservation activities underway on pavement preservation of concrete pavements in California. In particular, it covers the following activities: 1. The development of the Maintenance Technical Advisory Guide (MTAG – 1) for Rigid Pavement Preservation. 2. The performance of diamond-grinding projects and the benefits of diamond grinding in life extension, ride quality improvement, and noise reduction. 3. The performance of dowel bar retrofits and the lessons learned from several projects. 4. The performance of full-depth slab repair, particularly with regard to the use of rapid strength concrete (RSC). Caltrans plans for implementing pavement preservation on a more widespread basis within the State are also discussed, for both pavements in general and rigid pavements in particular.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - California
KW  - Concrete pavements
KW  - Diamond grinding
KW  - Dowel bar retrofit
KW  - Pavement maintenance
KW  - Preservation
KW  - Repairing
KW  - Rigid pavements
KW  - Slabs
UR  - https://trid.trb.org/view/1252544
ER  - 

TY  - CONF
AN  - 01483824
AU  - Bhattacharya, Biplab B
AU  - Zola, Michael P
AU  - Rao, Shreenath
AU  - Smith, Karl
AU  - Hannenian, Craig
AU  - Federal Highway Administration
TI  - Performance of Edge Drains in Concrete Pavements in California
PY  - 2009
SP  - pp 145-158
AB  - The California Department of Transportation (Caltrans) recently completed a study to evaluate the performance of edge drain systems placed along portland cement concrete (PCC) pavements. To date, a variety of edge drain designs, backfill materials, and placement methods have been used and have resulted in varying degrees of success when measured against overall pavement performance. This study investigated several different types of edge drain systems that have been used by Caltrans. Their performance was evaluated, and it was observed that more than 70 percent of the surveyed edge drains were not performing efficiently or as designed. This poor overall result can be attributed to design flaws, improper construction practices, and lack of maintenance. Generally, the performance of originally constructed edge drains was better than retrofit projects, since originally constructed edge drains are generally equipped with larger diameter drain pipes, deeper trenches, and treated permeable bases. Edge drain trenches in retrofit projects are generally not deep enough to effectively collect all infiltrated water from the PCC and base layers. The geotextile filter fabric materials found in excavated projects are not soil-specific, which can cause clogging and eventually reduce the ability of these edge drains to allow free flow of water. Improper construction practices, such as high percentages of cement in cement-treated permeable base backfill material and improper placement of geo-fabric material were observed in a few of the surveyed edge drain projects. Among surveyed projects, more than 50 percent of the edge drain outlet pipes were either buried or clogged, which can be attributed to lack of maintenance.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - California
KW  - Concrete pavements
KW  - Edge drains
KW  - Pavement maintenance
KW  - Pavement performance
KW  - Portland cement concrete
UR  - https://trid.trb.org/view/1252564
ER  - 

TY  - CONF
AN  - 01483823
AU  - Donahue, John P
AU  - Federal Highway Administration
TI  - Restoration of New PCC Pavement With Uncontrolled Cracking in Missouri
PY  - 2009
SP  - pp 55-70
AB  - A new, properly designed jointed plain concrete pavement (JPCP) is intended to provide longlasting performance with minimal maintenance and infrequent, if any, rehabilitation. The time required for quality control over construction techniques, mix materials, and environmental conditions inhabits a minute portion of the pavement’s potential design life, yet renders so much influence over the probability of achieving that design life. Since every aspect of quality control cannot realistically be fully attained during construction, State specifications usually contain a safety net allowing the project engineer to reject the finished product if any defects become visually apparent. One such defect that randomly occurs is uncontrolled cracking. Cracking has its root in various causes, including but not limited to late sawing, insufficient sawing depth, thermal shock, and high water-to-cementitious materials (w/c) ratios. Whatever the causes are, the result is the same, a panel with an indeterminate reduction in service life because it is no longer a monolith. Typical State specification language universally proclaims, “Remove and replace.” Although the specifications often allow some room for alternative mitigation, the project engineer representing the State agency, not necessarily trained in the nuances of judging relatively harmless versus crippling concrete fractures, generally errs on the side of conservatism and requires the full-depth repair. Unfortunately, the replacement panel, besides being a costly fix, can never duplicate the aggregate interlock properties of the original slab. For the past decade or so the American Concrete Pavement Association (ACPA) and the Federal Highway Administration (FHWA) have placed greater emphasis on using alternative and less severe repair options for cracked panels such as cross-stitching, dowel bar retrofit, undersealing, and partial-depth repair. The Missouri Department of Transportation (MoDOT) has made a concerted effort in the past 5 years to employ these strategies. This paper presents the details of four new JPCP projects that had uncontrolled cracks form soon after construction, and the procedures taken to evaluate and correct the deficiencies.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Concrete pavements
KW  - Cracking of concrete pavements
KW  - Jointed plain concrete pavements
KW  - Missouri
KW  - Portland cement concrete
KW  - Rehabilitation (Maintenance)
KW  - Repairing
UR  - https://trid.trb.org/view/1252543
ER  - 

TY  - CONF
AN  - 01483822
AU  - Peshkin, David
AU  - Wolters, Angie
AU  - Alvarado, Cesar
AU  - Moulthrop, Jim
AU  - Federal Highway Administration
TI  - Pavement Preservation for High Traffic Volume PCC Roadways: Phase I Findings From SHRP 2 Project R26
PY  - 2009
SP  - pp 133-143
AB  - The practice of pavement preservation in general, and preventive maintenance in particular, is a growing trend among transportation agencies around the United States. However, the practice of preservation on high traffic volume roadways is not as well documented as it is on lower volume roadways. Nonetheless, the preservation of high traffic volume roadways is as important as the preservation of lower traffic volume roadways. Under the direction of SHRP 2, Project R26, Preservation Approaches for High Traffic Volume Roadways, was initiated to assess the state of the practice and to provide guidance on pavement preservation for high traffic volume roadways. The ultimate outcome of this study is the development of guidelines that lead to higher volume roadways being maintained in serviceable condition for longer periods of time before rehabilitation is needed, at a lower cost, in a safer manner, and with less disruption to the traveling public. A secondary objective of this study is to identify promising pavement preservation strategies for application on high traffic volume roadways that might not commonly be used, and to make recommendations for further research opportunities. As part of the first phase of this study, a 24-question survey of practice was distributed to all state highway agencies and Canadian provinces, as well as selected large cities and several agencies in other countries. Ultimately, 57 responses were received. While survey questions addressed both hot-mix asphalt and portland cement concrete (PCC) pavements, this paper focuses on the responses related to pavement preservation on PCC pavements.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Concrete pavements
KW  - High volume roads
KW  - Pavement maintenance
KW  - Portland cement concrete
KW  - Preservation
KW  - Strategic Highway Research Program 2
KW  - Traffic volume
UR  - https://trid.trb.org/view/1252563
ER  - 

TY  - CONF
AN  - 01483690
AU  - Federal Highway Administration
TI  - Proceedings. National Conference on Preservation, Repair, and Rehabilitation of Concrete Pavements, St. Louis, Missouri, April 21-24, 2009
PY  - 2009
SP  - 366p
AB  - This conference was organized as a part of technology transfer activities conducted under the U.S. Concrete Pavement Technology Program, which operates within the Federal Highway Administration. The conference objective was to provide a national forum to address the technology needs related to the preservation, repair and rehabilitation of concrete pavements.  Papers are organized into 5 Parts: Part 1—Pavement Condition Evaluation, Impact, and Durability; Part 2—Concrete Pavement Preservation, Repair, and Rehabilitation; Part 3—Concrete Pavement Repair Techniques and Experiences; Part 4—Concrete Pavement Surface Texture; Part 5—Emerging Pavement Repair and Rehabilitation Technologies.
U1  - National Conference on Preservation, Repair, and Rehabilitation of Concrete PavementsFederal Highway AdministrationTransportation Research BoardAmerican Association of State Highway and Transportation Officials (AASHTO)American Concrete Pavement AssociationCement Association of CanadaInternational Grooving and Grinding AssociationInternational Society for Concrete PavementsMissouri Department of TransportationNational Concrete Pavement Technology CenterPortland Cement AssociationSt. Louis,Missouri,United States StartDate:20090421 EndDate:20090424 Sponsors:Federal Highway Administration, Transportation Research Board, American Association of State Highway and Transportation Officials (AASHTO), American Concrete Pavement Association, Cement Association of Canada, International Grooving and Grinding Association, International Society for Concrete Pavements, Missouri Department of Transportation, National Concrete Pavement Technology Center, Portland Cement Association
KW  - Concrete Pavement Technology Program
KW  - Concrete pavements
KW  - Conferences
KW  - Durability
KW  - Evaluation
KW  - Innovation
KW  - Maintenance
KW  - Preservation
KW  - Rehabilitation (Maintenance)
KW  - Repairing
KW  - State of the art
KW  - Technology assessment
KW  - Technology transfer
KW  - Texture
UR  - http://sjnavarro.files.wordpress.com/2008/08/concrete-prr-scr.pdf
UR  - https://trid.trb.org/view/1252444
ER  - 

TY  - ABST
AN  - 01462338
TI  - University Transportation Center (UTC) Symposium and Workshop
AB  - This research project will coordinate with University Transportation Centers on development of strategic research themes as part of the FHWA Exploratory Advanced Research projects and scanning and convening activities. Conduct separate workshops on the following themes: human factors and visibility; advanced sensing and future telecommunication in ITS; mechanics between the vehicle and the road; and technical feasibility, economic impact, and societal effect of the integrated safety system concept.
KW  - Coordination
KW  - Feasibility analysis
KW  - Intelligent transportation systems
KW  - Research projects
KW  - Traffic signal control systems
KW  - Workshops
UR  - https://trid.trb.org/view/1230559
ER  - 

TY  - ABST
AN  - 01462337
TI  - Production Digital Highway Measurement (DHM) System Development
AB  - The objective of this research project is to develop software, specifications, and an operational manual for the production of the DHM System, and transfer DHM System technologies or capabilities indirectly, through demonstrations, or directly through licensing, to the commercial data scanning community and to researchers, to advance the state of the art in creating road data inventories for asset management, and to support future highway safety research.
KW  - Asset management
KW  - Data quality
KW  - Highway safety
KW  - Research projects
KW  - Software
KW  - Synchronization
KW  - Traffic signal control systems
UR  - https://trid.trb.org/view/1230558
ER  - 

TY  - ABST
AN  - 01462334
TI  - Performance Data for Ultrahigh Performance Concrete (UHPC) Bridge Elements
AB  - This research project will conduct a series of experiments characterizing the benefits of UHPC in bridge applications. These experiments will be performed using standardized materials performance and durability tests as well as full-scale, instrumented load tests in the main structures lab. Performance data will lead to technical reports, and eventually input directly into American Association of State Highway and Transportation Officials guideline documents.
KW  - Bridge construction
KW  - Bridge design
KW  - Bridge members
KW  - Durability
KW  - High performance concrete
KW  - Research projects
KW  - Ultra high performance concrete
UR  - https://trid.trb.org/view/1230555
ER  - 

TY  - ABST
AN  - 01462333
TI  - Design for Corrosion Protection
AB  - This research project will make efforts to greatly enhance the durability of bridges by optimizing the guidance on use of corrosion protection systems
KW  - Bridge design
KW  - Bridges
KW  - Corrosion
KW  - Corrosion protection
KW  - Durability
KW  - Research projects
UR  - https://trid.trb.org/view/1230554
ER  - 

TY  - ABST
AN  - 01462332
TI  - Integrated Steel Bridge Abutment System Using Geosynthetic Reinforced Soil (GRS) Technology
AB  - This project will research and develop a steel bridge superstructure type that can be integrated into GRS abutments to make a joint free bridge. A concept structure will be built in Ohio to evaluate performance of the system.
KW  - Bridge abutments
KW  - Bridge superstructures
KW  - Geosynthetics
KW  - Ohio
KW  - Reinforced soils
KW  - Research projects
KW  - Steel bridges
UR  - https://trid.trb.org/view/1230553
ER  - 

TY  - ABST
AN  - 01462331
TI  - Fire Damage Assessment of Bridge Structures
AB  - This research project will perform a synthesis to collect available information relating to bridge performance when subjected to fire. Results will lead to development of a manual for condition evaluation and guidelines for enhancing fire resistance.
KW  - Bridges
KW  - Damage (Bridges)
KW  - Fire
KW  - Fire damage
KW  - Fire resistance
KW  - Guidelines
KW  - Research projects
UR  - https://trid.trb.org/view/1230552
ER  - 

TY  - ABST
AN  - 01462329
TI  - Fatigue of Galvanized Sign Pole Structures
AB  - This research project is an experimental study to evaluate the effect galvanizing has on fatigue life. There are numerous reported failures of this type of structure nationally.
KW  - Failure
KW  - Galvanized metals
KW  - Poles (Supports)
KW  - Research projects
KW  - Sign supports
UR  - https://trid.trb.org/view/1230550
ER  - 

TY  - ABST
AN  - 01462327
TI  - Lightweight Concrete Code Provisions
AB  - This research project will conduct an extensive laboratory study to develop code provisions for using lightweight concrete in bridge structures. It is not known if existing code equations are applicable for this new class of material.
KW  - Bridge design
KW  - Bridge substructures
KW  - Building codes
KW  - Laboratory tests
KW  - Lightweight concrete
KW  - Research projects
UR  - https://trid.trb.org/view/1230548
ER  - 

TY  - ABST
AN  - 01462075
TI  - Accelerated Determination of ASR Susceptibility During Concrete Prism Testing Through Nonlinear Resonance Ultrasonic Spectroscopy
AB  - The objective of this study is to develop altogether new laboratory accelerated test method in lieu of ASTM C1293 method which takes one/two years to evaluate the susceptibility of aggregate for alkali silica reactions (ASR). Non-linear resonate spectroscopy will be evaluated against ASTM C1293 and ASTM C1260 test methods to check the accuracy of the developed technique.
KW  - Accelerated tests
KW  - Alkali silica reactions
KW  - Concrete prism tests
KW  - Durability
KW  - Infrastructure
KW  - Laboratory tests
KW  - Research projects
KW  - Resonance
KW  - Spectroscopy
UR  - https://trid.trb.org/view/1230295
ER  - 

TY  - RPRT
AN  - 01456755
AU  - McCullouch, Bob
AU  - Purdue University
AU  - Indiana Department of Transportation
AU  - Federal Highway Administration
TI  - Innovative Contracting Manual
PY  - 2009
SP  - 22p
AB  - This manual summarizes seven innovative contract approaches for highway projects.  The seven approaches are:  design-build; warranties;  A + B contracting; A+B bidding + incentive/ disincentive; hyperfix approach; warranties; and work day with no excuse completion date contracts.  For each approach, the manual includes a description, lists advantages and disadvantages, and provides project type recommendations. In determining the application of the contracting methods in this manual, the project manager determines if the project meets the criteria for the listed contracting methods.  When a project clears scoping and planning, the district project manager (DPM) will evaluate it for possible innovative contracting methods.  If a project is deemed to be a match with an innovative contracting option it is submitted to District Construction for review and approval.  District Construction reviews and takes action either to approve, reject or request additional information on the candidate project. For projects above the authority level of District Construction, the request is forwarded to the central office project management office for review and approval.  The DPM works with the designer to ensure that the contracting method selected is incorporated into the contract documents for letting.
KW  - Competitive bidding
KW  - Construction projects
KW  - Contract administration
KW  - Design build
KW  - Incentives
KW  - Indiana
KW  - Innovation
KW  - Road construction
KW  - Warranty
UR  - http://dx.doi.org/10.5703/1288284314272
UR  - https://trid.trb.org/view/1218738
ER  - 

TY  - RPRT
AN  - 01353551
AU  - Research and Innovative Technology Administration
AU  - Federal Highway Administration
TI  - Applications of 3D Visualization: Peer Exchange Summary Report, Raleigh, North Carolina, July 8–9, 2009
PY  - 2009///Summary Report
SP  - 18p
AB  - On July 8–9, 2009, the Federal Highway Administration’s (FHWA) Office of Interstate and Border Planning sponsored a 1.5-day peer exchange to promote the sharing of information on the use of 3D visualization techniques at transportation agencies. North Carolina Department of Transportation (NCDOT) hosted the peer exchange. Participants included staff from the Baltimore Metropolitan Council, FHWA, California Department of Transportation (Caltrans), Minnesota Department of Transportation (Mn/DOT), New York State DOT, Volusia County Metropolitan Planning Organization (MPO), the U.S. DOT Volpe National Transportation Systems Center, and Washington State DOT (WSDOT). The purpose of the peer exchange, which focused on select transportation agencies’ 3D visualization activities, was to allow participants with noteworthy visualization capabilities, products, and organizational arrangements the opportunity to share their knowledge, experiences, and lessons learned. Challenges faced in creating visualizations and advancing the state of the practice at their respective agencies were also described. This report summarizes the peer exchange’s presentations, demonstrations and discussions. Comments, questions, and answers from each participant’s presentation session follow the report’s presentation overviews. It is expected that this document will be a resource for other transportation agencies seeking to learn more about their peers’ 3D visualization activities and practices.
KW  - Highway design
KW  - Metropolitan planning organizations
KW  - Peer exchange
KW  - State departments of transportation
KW  - State of the practice
KW  - Three dimensional displays
KW  - Visualization
UR  - http://www.gis.fhwa.dot.gov/documents/PeerEx_report_3D.pdf
UR  - https://trid.trb.org/view/1118334
ER  - 

TY  - RPRT
AN  - 01353550
AU  - Research and Innovative Technology Administration
AU  - Federal Highway Administration
TI  - Geographic Information Systems Applications for Bicycle and Pedestrian Decision-Making: Peer Exchange Summary Report, Miami, Florida, May 11‐12, 2009
PY  - 2009///Summary Report
SP  - 29p
AB  - On May 11–12, 2009, during National Bike Month and National Bike to Work Week, the Federal Highway Administration (FHWA) Office of Interstate and Border Planning sponsored a 1.5-day peer exchange to promote the advancement of bicycling and walking as healthy, efficient, and safe transportation modes. The purpose of the peer exchange, which focused on select transportation agencies’ applications of geographic information systems (GIS) to accomplish various bicycle and pedestrian objectives, was to allow participants with notable GIS applications for bicycle and pedestrian planning the opportunity to share knowledge and experiences. Lessons learned and challenges faced in using GIS for bicycle and pedestrian considerations were also discussed. This report provides a summary of the presentations made and discussions held at the peer exchange. It should serve as a resource for State Departments of Transportation (DOTs) and transportation agencies looking to learn more about the implementation of GIS for bicycle and pedestrian planning. The report concludes with a section on the lessons participants stated as having learned and recommendations they made for moving forward. The City of Miami hosted the peer exchange at the offices of the Miami-Dade County Metropolitan Planning Organization (MPO). Participants included staff from FHWA, the Broward MPO, the Martin MPO, the Michigan DOT, the New Jersey DOT, the City of Seattle DOT, the Two Rivers-Ottauquechee Regional Commission (TRORC), and the U.S. Department of Transportation (USDOT), Research and Innovative Technology Administration/Volpe National Transportation Systems Center (Volpe Center). Other observers included staff from the City of Miami Mayor’s Office, the City of Miami Public Works Department, and the Street Plans Collaborative.
KW  - Bicycle facilities
KW  - Bicycling
KW  - Geographic information systems
KW  - Lessons learned
KW  - Metropolitan planning organizations
KW  - Pedestrians
KW  - Peer exchange
KW  - Planning and design
KW  - State departments of transportation
KW  - Walking
UR  - http://www.gis.fhwa.dot.gov/documents/GIS_BikePed_Peer_rpt.pdf
UR  - https://trid.trb.org/view/1118339
ER  - 

TY  - RPRT
AN  - 01353549
AU  - Research and Innovative Technology Administration
AU  - Federal Highway Administration
AU  - Federal Highway Administration
TI  - GIS Applications in Eco-Logical Grant Projects: Peer Exchange Summary Report, Austin, TX, July 22-23, 2009
PY  - 2009///Summary Report
SP  - v.p.
AB  - On August 22-23, 2009, the Federal Highway Administration (FHWA) Office of Interstate and Border Planning and Office of Project Development and Environmental Review sponsored a 1.5-day peer exchange to convene recipients of "Eco-Logical" grants whose funded projects related to geographic information systems (GIS). The Capital Area Council of Governments (CAPCOG) in Austin, Texas hosted the peer exchange, and participants included staff from the U.S. Environmental Protection Agency (EPA) Region 6, Envision Central Texas, FHWA, Houston-Galveston Area Council, Mid-America Regional Council, New Hampshire Audubon Society, North Central Texas Council of Governments (NCTCOG), Oregon State University, Tri-County Regional Planning Commission, the Trust for Public Land, the U.S. DOT Volpe National Transportation Systems Center, and The Wetlands Conservancy. The purpose of the peer exchange was to allow grant recipients the opportunity to share information on and learn about the various GIS activities implemented with support from FWHA's first Eco-Logical grant cycle. Lessons learned and challenges faced were also discussed. This report summarizes the presentations given and ensuing discussions. Comments, questions, and answers from participants' presentation sessions follow the presentation overviews. It is expected that this document will be a resource for other transportation agencies seeking to learn more about uses of GIS to support the implementation of an ecosystem approach to transportation project development.
KW  - Ecology
KW  - Environmental policy
KW  - Geographic information systems
KW  - Highway design
KW  - Highway planning
KW  - Infrastructure
KW  - Lessons learned
KW  - Peer exchange
KW  - Project development
UR  - http://www.gis.fhwa.dot.gov/documents/PeerEx_report_72209.asp
UR  - https://trid.trb.org/view/1118337
ER  - 

TY  - RPRT
AN  - 01333133
AU  - Federal Highway Administration
TI  - Innovations for Tomorrow’s Transportation
PY  - 2009
SP  - 73p
AB  - In the early 1990s, the Office of Policy and Governmental Affairs embarked on a research journey entitled ―Searching for Solutions, A Policy Discussion Series.‖ These 17 reports included areas that, at the time, were exploratory and advanced. The wide-ranging and forward-thinking topics included congestion pricing, public-private partnerships, public and private sector roles in intelligent vehicle highway systems, productivity and the infrastructure, air quality, productivity measures, bond financing, land use and transportation, life-cycle cost analysis, North American trade, cost allocation, and the personal transportation survey. New topics have not been added to the series for almost 10 years, and the time has come to bring focus and attention into the policy challenges of the future. The transportation system is facing new challenges to deliver and implement passenger and freight systems that meet the needs of mobility and economic growth. To synthesize the multifaceted issues facing highway transportation, the Office of Transportation Policy Studies is initiating this new series of Transportation Policy Discussions. As its predecessor did, this series will examine challenges and solutions across a broad range of topics including: (1) implementation issues for vehicle miles traveled (VMT) based user fees; (2) issues and options with respect to infrastructure banks; (3) achieving intermodal interoperability; (4) optimal fees for commercial motor vehicles; (5) financial structures for mega-region projects; (6) implications of alternative fuels; (7) meeting the needs of the aging population; (8) role of the Federal Government in solving urban transportation congestion; and (9) other topics. However, rather than being strictly defined by these initial topics, the series is expected to encompass policy discussions covering a wide range of topics over the course of the next five years. This first issue of Innovations for Tomorrow’s Transportation is the result of the effort of many transportation leaders’ input, insight, and discussion. It provides an encompassing framework outlining transportation research needs in six policy areas. Future discussions and workshops will bring experts and government officials together for other topics of interest. Many of these topics will provide useful input into future surface transportation legislation by providing a forum for researchers and stakeholders to discuss future directions of highway delivery. These future topics include implementation issues and options for a VMT-based user-fee system and issues and options related to infrastructure banks.
KW  - Aged
KW  - Alternate fuels
KW  - Commercial vehicle operations
KW  - Congestion management systems
KW  - Economic growth
KW  - Infrastructure
KW  - Intermodal transportation
KW  - Mobility
KW  - Policy making
KW  - Technological innovations
KW  - User charges
KW  - Vehicle miles of travel
UR  - http://ntl.bts.gov/lib/35000/35200/35295/innovations.pdf
UR  - https://trid.trb.org/view/1097260
ER  - 

TY  - RPRT
AN  - 01162140
AU  - Federal Highway Administration
TI  - Cleveland Innerbelt Project, Cuyahoga County : environmental impact statement
PY  - 2009///Volumes held: Draft(fol), DappC, DappF, Final(fol), access modification study B1
KW  - Environmental impact statements
KW  - Ohio
UR  - https://trid.trb.org/view/923126
ER  - 

TY  - RPRT
AN  - 01162037
AU  - Federal Highway Administration
TI  - Wisconsin state highway 15, New London to Greenville, Outagamie County : environmental impact statement
PY  - 2009///Volumes held: Draft, Final(2v)
KW  - Environmental impact statements
KW  - Wisconsin
UR  - https://trid.trb.org/view/923021
ER  - 

TY  - RPRT
AN  - 01155816
AU  - Wisconsin Department of Transportation
AU  - Federal Highway Administration
TI  - WisDOT Research Program, 2009 Annual Report
PY  - 2009
SP  - 45p
AB  - The Wisconsin Department of Transportation's (WisDOT's) vision is 'Dedicated people creating transportation solutions through innovation and exceptional service.' To help generate this innovation, the Research & Library Unit oversees several formal research programs, provides information services to WisDOT employees and collaborates with other research organizations to solve problems of common concern. The emphasis areas of the department's strategic plan guide the efforts of the research program: (1) Value and develop employees; (2) Anticipate and meet customers' needs: (3) Continually improve processes and partnerships; (4) Provide and operate a safe and secure transportation system; and (5) Enhance opportunities for mobility and economic growth. The research program's goal is to deliver research results and supporting activities that address specific, identified needs in these emphasis areas across all five WisDOT divisions.
KW  - Information systems
KW  - Policy making
KW  - Research projects
KW  - Strategic planning
KW  - Technological innovations
KW  - Technology transfer
KW  - Wisconsin
UR  - https://trid.trb.org/view/916410
ER  - 

TY  - RPRT
AN  - 01154148
AU  - Federal Highway Administration
AU  - American Traffic Safety Services Association
AU  - American Association of State Highway and Transportation Officials (AASHTO)
AU  - Institute of Transportation Engineers (ITE)
TI  - Manual on Uniform Traffic Control Devices for Streets and Highways, 2009 Edition
SN  - 9781560514732
PY  - 2009
SP  - 892p
AB  - The Manual on Uniform Traffic Control Devices (MUTCD) is approved by the Federal Highway Administration as the National Standard in accordance with Title 23 U.S. Code, Sections 109(d), 114(a), 217, 315, and 204(a), 23CFR 655, and 49 CFR 1.48(b)(8), 1.48(b)(33), and 1.48(c)(2).  The MUTCD is presented in six parts:  (1) General; (2) Signs; (3) Markings; (4) Highway Traffic Signals; (5) Traffic Control Devices for Low-Volume Roads; (6) Temporary Traffic Control; (7) Traffic Control for School Areas; (8) Traffic Control for Railroad and Light Rail Transit Grade Crossings; and (9) Traffic Control for Bicycle Facilities.  There are two appendices: (1A) Congressional Legislation; and (2A) Metric Conversions.  An index is provided.
KW  - Bicycle facilities
KW  - Highway traffic control
KW  - Light rail transit grade crossings
KW  - Low volume roads
KW  - Manual on Uniform Traffic Control Devices
KW  - Railroad grade crossings
KW  - Road markings
KW  - Schools
KW  - Temporary traffic control devices
KW  - Traffic control devices
KW  - Traffic signals
KW  - Traffic signs
UR  - http://mutcd.fhwa.dot.gov/pdfs/2009/mutcd2009edition.pdf
UR  - http://mutcd.fhwa.dot.gov/pdfs/2009/pdf_index.htm
UR  - https://trid.trb.org/view/915598
ER  - 

TY  - RPRT
AN  - 01153628
AU  - Clevenger, Tony
AU  - Huijser, Marcel P
AU  - Western Transportation Institute
AU  - Federal Highway Administration
TI  - Handbook for Design and Evaluation of Wildlife Crossing Structures in North America
PY  - 2009
SP  - 212p
AB  - This handbook provides technical guidelines for the planning, design and evaluation of wildlife crossing structures and their associated measures (fencing, gates) that facilitate the safe movement of wildlife across roads and increase motorist safety. It has been prepared for transportation, natural resource and land management agencies responsible for planning, designing and implementing measures for mitigating the impacts of roads on wildlife populations. Stakeholder and other groups involved in mitigation planning will also find the handbook useful in their discussions with agencies. The handbook describes how to increase the effectiveness of established designs and recommends ways to design for particular species and species groups in different landscapes. The guidelines can be used for wildlife crossings on new or existing highways, highway expansions (e.g., two-lane to four-lane) and bridge reconstruction projects. The response of particular wildlife species to these measures may vary across North America. Therefore, the design guidelines are intended to be generalized and a starting point for the future development of more regionalized, landscape-specific guidelines based on an adaptive management process. The handbook is the product of an extensive collection and synthesis of current literature, knowledge, and science-based data with regard to the current practices in wildlife crossing mitigation. The handbook provides a sound scientific basis for effective planning, policy and implementation of mitigation aimed at reducing habitat fragmentation and mortality effects of roads on wildlife populations. Recommended designs once implemented and their performance evaluated through monitoring will serve to advance our understanding of the utility of different wildlife crossing designs across North America.
KW  - Guidelines
KW  - Habitat (Ecology)
KW  - Habitat connectivity
KW  - Handbooks
KW  - Highway safety
KW  - North America
KW  - Planning and design
KW  - Wildlife crossings
UR  - http://www.westerntransportationinstitute.org/documents/reports/425259_Final_Report.pdf
UR  - https://trid.trb.org/view/915024
ER  - 

TY  - RPRT
AN  - 01153604
AU  - Federal Highway Administration
AU  - Federal Transit Administration
TI  - A Guide to Transportation Decisionmaking
PY  - 2009
SP  - 36p
AB  - The Federal Highway Administration (FHWA) and Federal Transit Administration (FTA) created this guide to help you understand how transportation decisions are made at the local, State, and national levels and how you can take advantage of the opportunities provided to contribute your ideas.  Topics covered include the following:  how the decision making starts; the basics of transportation decision making; the government and transportation decision making; transportation plans and programs; putting the plans in place; funding transportation projects; communities and the environment in transportation planning; your role in the planning process; the goals of project development and the National Environmental Policy Act (NEPA) process; documenting decisions; and your role in project development.
KW  - Communities
KW  - Decision making
KW  - Documentation
KW  - Financing
KW  - Guidelines
KW  - Handbooks
KW  - National Environmental Policy Act of 1969
KW  - Project development
KW  - Project development process
KW  - Public participation
KW  - Transportation planning
KW  - Transportation projects
UR  - http://www.fhwa.dot.gov/planning/decisionmaking/decisionmaking.pdf
UR  - https://trid.trb.org/view/914941
ER  - 

TY  - RPRT
AN  - 01152767
AU  - National Technology Development, LLC
AU  - New York State Department of Transportation
AU  - New York State Energy Research and Development Authority
AU  - Federal Highway Administration
TI  - Quantify the Energy and Environmental Effects of Using Recycled Asphalt and Recycled Concrete for Pavement Construction
PY  - 2009///Phase I Final Report
SP  - 50p
AB  - The objective of this study is to quantify the energy and environment impacts from using recycled materials for highway construction. Specifically, when recycled asphalt pavement is re-used for producing hot mix asphalt or when recycled concrete aggregate is used in concrete, how much energy will be utilized and how much are the greenhouse emissions. This study quantified the impact of using recycled asphalt pavement (RAP) in hot mix asphalt and recycled concrete aggregate in concrete on energy consumption and greenhouse gas emission. For RAP, the impact on energy consumption and greenhouse gas emission is affected by a few factors, such as moisture content in RAP, hot mix asphalt discharge temperature and RAP content. A mathematical model was developed to determine the impact. For recycled concrete aggregate for concrete production, impact on energy consumption and greenhouse gas emission is largely affected by transporting distances. A simple model was also developed for recycled concrete aggregate.
KW  - Energy consumption
KW  - Environmental impacts
KW  - Greenhouse gases
KW  - Haul distance
KW  - Hot mix asphalt
KW  - Mathematical models
KW  - Recycled asphalt pavements
KW  - Recycled concrete aggregate
KW  - Recycled materials
KW  - Road construction
UR  - http://www.nysdot.gov/divisions/engineering/technical-services/trans-r-and-d-repository/C-08-02%20Final%20Report%209-8-09.pdf
UR  - https://trid.trb.org/view/914417
ER  - 

TY  - RPRT
AN  - 01148591
AU  - Ghaman, Raj
AU  - Federal Highway Administration
TI  - Next-Generation Smart Traffic Signals: RHODES(NG) With Intellidrive(SM)—the Self-Taught Traffic Control System
PY  - 2009
SP  - 2p
AB  - Can a self-calibrating signal control system lead to wider adoption of adaptive traffic control systems? The focus of “Next Generation of Smart Traffic Signals,” an Exploratory Advanced Research (EAR) Program project, is a system that —with little human intervention—continuously monitors, learns, predicts, and responds to traffic demands and conditions with optimal signal timing for prevailing conditions. Launched by the Federal Highway Administration (FHWA) in 2007, the study is being conducted by Arizona State University in Phoenix.
KW  - Adaptive control
KW  - Highway traffic control
KW  - Highway traffic control systems
KW  - IntelliDrive (Program)
KW  - Self organizing systems
KW  - Smart traffic signals
KW  - Traffic signal timing
UR  - http://ntl.bts.gov/lib/31000/31400/31409/FHWA-HRT-09-063.pdf
UR  - https://trid.trb.org/view/908314
ER  - 

TY  - RPRT
AN  - 01148586
AU  - Meininger, Richard
AU  - Federal Highway Administration
TI  - Crack-Resistant Concrete: Maximizing the Service Life of Transportation Infrastructure
PY  - 2009
SP  - 2p
AB  - Crack-free concrete? Although much progress has been made in reducing concrete’s propensity to crack, the goal remains elusive. A novel approach to this problem is the focus of “High-Performance Stress-Relaxing Cementitious Composites for Crack-Free Pavements and Transportation Structures,” an Exploratory Advanced Research (EAR) Program project launched by the Federal Highway Administration (FHWA) in 2008 and conducted at Texas A&M University’s Texas Transportation Institute. This project will prove successful if it is able to make a concrete that is 50 percent less likely to crack in a typical concrete transportation infrastructure under typical service conditions.
KW  - Composite materials
KW  - Concrete pavements
KW  - Cracking of concrete pavements
KW  - Cracking resistance
KW  - Durability
KW  - Infrastructure
KW  - Service life
UR  - http://ntl.bts.gov/lib/31000/31400/31406/FHWA-HRT-09-065.pdf
UR  - https://trid.trb.org/view/908291
ER  - 

TY  - RPRT
AN  - 01148565
AU  - Adams, Mike
AU  - Federal Highway Administration
TI  - Real-Time Measurement of Soil Stiffness During Static Compaction
PY  - 2009
SP  - 2p
AB  - Is continuous sensing of soil properties during static pad foot roller compaction achievable? A new pad-based, roller-integrated system for real-time measurement of the elastic modulus of fine- and mixed-grain soils is the goal of “Development of Soil Stiffness Measuring Device for Pad Foot Roller Compactor,” a project of the Federal Highway Administration’s (FHWA’s) Exploratory Advanced Research (EAR) Program. Initiated in 2008, the study is being conducted by the Colorado School of Mines with the participation of roller manufacturers and the Colorado and Minnesota Departments of Transportation.
KW  - Measurement
KW  - Modulus of elasticity
KW  - Real time information
KW  - Soil compaction
KW  - Soils
KW  - Stiffness
UR  - http://ntl.bts.gov/lib/31000/31400/31408/FHWA-HRT-09-047.pdf
UR  - https://trid.trb.org/view/908312
ER  - 

TY  - RPRT
AN  - 01148561
AU  - Rice, Ed
AU  - Federal Highway Administration
TI  - Low-Cost Safety Enhancements for Stop-Controlled and Signalized Intersections
PY  - 2009
SP  - 20p
AB  - A systematic approach involving the application of low-cost, effective countermeasures at a large number of intersections which are experiencing crashes can collectively reduce substantive numbers of statewide intersection crashes and fatalities. Intersections with crash experience are defined as those with crash levels at or above defined crash level thresholds, (usually described in terms of number of crashes per intersection occurring over a 5-year period) where the application of the low-cost countermeasure will be cost effective. Most intersections experiencing crashes meet the minimum Manual on Uniform Traffic Control Devices (MUTCD) standards, but added countermeasures are needed to reduce future crash potential. The purpose of this document is to present information on suggested effective, low-cost intersection countermeasures developed using intersection safety research results and input from an intersection safety expert panel. These low-cost countermeasures can be applied to a large number of intersections with a high frequency of crashes using a systematic approach. The net impact of such an approach can produce significant reductions in statewide intersection crashes, fatalities, and serious injuries. Low-cost countermeasures are defined as those ranging from $1,000 to $50,000 per intersection.
KW  - Countermeasures
KW  - Friction
KW  - High risk locations
KW  - Highway safety
KW  - Improvements
KW  - Low cost
KW  - Road markings
KW  - Signalized intersections
KW  - Speed
KW  - Stop-controlled intersections
KW  - Street lighting
KW  - Traffic signs
UR  - http://ntl.bts.gov/lib/31000/31400/31412/FHWA-SA-09-020.pdf
UR  - https://trid.trb.org/view/908316
ER  - 

TY  - RPRT
AN  - 01148553
AU  - Gardner, Brian
AU  - Federal Highway Administration
TI  - Integrated Urban Systems Modeling: Designing a Seamless, Comprehensive Approach to Transportation Planning
PY  - 2009
SP  - 2p
AB  - Metropolitan planning agencies face increasingly complex issues in modeling interactions between the built environment and multimodal transportation systems. Although great strides have been made in simulating land use, travel demand, and traffic flow, gaining the ability to model urban systems across these phenomena would be a revolutionary advance. This challenge is the focus of “Modeling the Urban Continuum in an Integrated Framework: Location Choice, Activity Travel Behavior, and Dynamic Traffic Patterns,” an Exploratory Advanced Research (EAR) Program project launched by the Federal Highway Administration (FHWA) in 2008.
KW  - Integrated urban models
KW  - Multimodal transportation
KW  - Residential location
KW  - Traffic patterns
KW  - Transportation modeling
KW  - Transportation planning
KW  - Travel behavior
KW  - Urban transportation
UR  - http://ntl.bts.gov/lib/31000/31400/31407/FHWA-HRT-09-042.pdf
UR  - https://trid.trb.org/view/908311
ER  - 

TY  - RPRT
AN  - 01145043
AU  - Federal Highway Administration
AU  - Alabama Department of Transportation
AU  - Arizona Department of Transportation
AU  - California Department of Transportation
AU  - Florida Department of Transportation
AU  - Louisiana Department of Transportation and Development
AU  - Mississippi Department of Transportation
AU  - New Mexico Department of Transportation
AU  - Texas Department of Transportation
TI  - I-10 National Freight Corridor Study Phase II Report / Corridor ITS Architecture
PY  - 2009///Final Report
SP  - 445p
AB  - The Interstate 10 National Freight Corridor extends across the eight states that form the southern boundary of the contiguous 48 states. From west to east, the corridor crosses parts of California, Arizona, New Mexico, Texas, Louisiana, Mississippi, Alabama, and Florida. Four of the states form the entire land border between the United States and Mexico. The corridor passes through at least one metropolitan area in each of the eight states.  Phase I of the study sought to gather information about freight movement, inventory the physical condition of the interstate, identify operational problems for all motorists on I-10, and determine what improvements can be made to ease congestion and enhance safety. Phase II of the study was initiated to build on the previous effort, assisting the corridor states in their transition from a pooled fund status into a formal corridor coalition. To accomplish this goal, Phase II focuses on the development of an initial intelligent transportation systems (ITS) program and architecture. The primary intent was that by creating a corridor-wide ITS architecture, the states would have 1) a process to bind them, 2) a means of seeking additional funding, and 3) the ability to implement improvements quickly. The study focus remains on goods movement and therefore addresses those ITS elements that are relevant to freight. This does include some more general congestion relief and incident management issues, which greatly affect freight.
KW  - Alabama
KW  - Arizona
KW  - California
KW  - Florida
KW  - Freight traffic
KW  - Highway corridors
KW  - Highway operations
KW  - Intelligent transportation systems
KW  - Interstate highways
KW  - Louisiana
KW  - Mississippi
KW  - New Mexico
KW  - System architecture
KW  - Texas
KW  - Truck traffic
KW  - Trucking
UR  - http://www.i10icm.com/uploads/8/9/7/2/8972455/i-10_phase_ii_corridor_final_report.pdf
UR  - https://trid.trb.org/view/905340
ER  - 

TY  - RPRT
AN  - 01143754
AU  - Texas Transportation Institute
AU  - Texas Department of Transportation
AU  - Federal Highway Administration
TI  - Operating Guidelines for TxDOT Ramp Control Signals
PY  - 2009
SP  - 74p
AB  - The Texas Department of Transportation (TxDOT) currently maintains a "Traffic Signals Manual." Originally published in 1999, this manual provides a guide and reference for handling requests for traffic signals on the designated State Highway System, including installations financed by federal funds and installed on the numbered State Highway System. It describes the steps necessary for installing a traffic signal, from project inception through construction and final disposition of records. It contains five chapters: Introduction, Requests for Traffic Signal, Traffic Studies, Operational Considerations, and Traffic Signal Projects. It also contains two appendices: one that contains the forms necessary to warrant and install a traffic signal on TxDOT roadways and another for determining the need for traffic control at school crossings. The manual is available online at http://onlinemanuals.txdot.gov/txdotmanuals/tff/index.htm. This document is a product of TxDOT Research Project 0-5294, Warrants for Installing and Operating Ramp Metering. It provides guidelines for installing, operating, and maintaining ramp control signals on TxDOT roadways. These guidelines were written with the intent of becoming a new chapter in TxDOT’s "Traffic Signals Manual."
KW  - Guidelines
KW  - Installation
KW  - Operation and maintenance
KW  - Ramp metering
KW  - Texas
KW  - Warrants (Traffic control devices)
UR  - http://tti.tamu.edu/documents/0-5294-P1.pdf
UR  - https://trid.trb.org/view/904187
ER  - 

TY  - RPRT
AN  - 01143739
AU  - Federal Highway Administration
TI  - Highway Statistics 2007
PY  - 2009
SP  - 266p
AB  - This publication brings together annual series of selected statistical tabulations relating to highway transportation in four major areas: (1) highway infrastructure and users; (2) motor vehicles and fuel; (3) highway finance--the receipts and expenditures for highways by public agencies; and (4) highway performance--the extent, characteristics, condition, and use of the public highways, roads, and streets in the Nation.
KW  - Finance
KW  - Fuels
KW  - Highways
KW  - Infrastructure
KW  - Motor vehicles
KW  - Statistics
KW  - System performance
KW  - Tables (Data)
KW  - Travelers
KW  - United States
UR  - http://www.fhwa.dot.gov/policyinformation/statistics/2007/2007_hwy_statistics.pdf
UR  - https://trid.trb.org/view/903992
ER  - 

TY  - CONF
AN  - 01142899
AU  - Lee, Ming-Gin
AU  - Chiu, Chui-Te
AU  - Kan, Yu-Cheng
AU  - Yen, Tsong
AU  - American Society of Civil Engineers
TI  - Experimental Study of Pervious Concrete on Parking Lot
SN  - 9780784410455
PY  - 2009
SP  - pp 125-131
AB  - In order to resolve the runoff of rainwater resource, to prevent the spoliation of ecology, and to reduce the effect of heat island, the search for a suitable mix design of the pervious concrete for Taiwan is not a trivial issue. The main purpose of this study is to find the suitable pervious concrete mix for pavement engineering. The two experiments included in this study are: (1) test the suitable mix design of pervious concrete; and (2) test certification in the field construction of pervious concrete on parking lot. Pervious pavement composed of 8-in surface layer (pervious concrete) and a 4-in base layer (gravel) were made. The results showed that the compression strength of the two pervious concrete core specimens from test certification in the field construction (parking lot) exceeds the ordinary concrete structure specification (175 kg/sq cm). The field permeability test for the parking lot is about 1,000 ml/15 sec. The water penetration of the above pervious concrete is very good and no cracks were present on surface. Therefore, it is an environment-friendly material for pavement.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Compressive strength
KW  - Environment
KW  - Parking lots
KW  - Pavements
KW  - Porous pavements
KW  - Taiwan
KW  - Testing
UR  - https://trid.trb.org/view/901912
ER  - 

TY  - CONF
AN  - 01142897
AU  - Ali, Liaqat
AU  - Fiaz, Akmal
AU  - American Society of Civil Engineers
TI  - Use of Fly Ash Along with Blast Furnace Slag as Partial Replacement of Fine Aggregate and Mineral Filler in Asphalt Mix, at High Temperature
SN  - 9780784410455
PY  - 2009
SP  - pp 112-118
AB  - The problems associated with the environmentally safe and efficient disposal of waste continue to grow. In many areas, existing landfills are beginning to fill up, and a “not-in-my-backyard” philosophy has made the establishment of new landfills very difficult. The cost of disposal continues to increase while the types of wastes accepted at municipal solid waste landfills are becoming more and more restricted. One answer to all of these problems lies in the ability of society to develop beneficial uses for these waste products. Pakistan is a developing country and in order to open new avenues of prosperity there is a need to develop roads network throughout the country. The use of waste byproducts would also relieve some of the burden on the natural resources/virgin materials. A research was undertaken to study the use of fly ash and granulated blast furnace slag as road construction materials and to see how these can improve the properties of asphalt mix design at high temperatures.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt mixtures
KW  - Fine aggregates
KW  - Fly ash
KW  - High temperature
KW  - Mineral fillers
KW  - Pakistan
KW  - Road construction
KW  - Slag
KW  - Waste products
UR  - https://trid.trb.org/view/901909
ER  - 

TY  - CONF
AN  - 01142891
AU  - Zhang, Yong-Jie
AU  - Cao, Wen-Gui
AU  - Zhao, Ming-Hua
AU  - American Society of Civil Engineers
TI  - Application of Fuzzy Sets to Geological Strength Index (GSI) System Used in Rock Slope
SN  - 9780784410462
PY  - 2009
SP  - pp 30-35
AB  - The stability assessment of slopes is difficult because characterization of rock masses and determination of their strength involve many uncertainties due to their complex nature. The fuzzy set theory is one of the tools to handle such uncertainties. And the difficulty can be overcome by using the Hoek-Brown empirical failure criterion in conjunction with the Geological Strength Index Classification System and fuzzy sets to express the uncertain parameters. For the stability assessment of slopes, a methodology has been presented in the study to process the fuzzy uncertainties in a slope reliability analysis. Simplified Bishop's method and interval theory were used to calculate the safety factor intervals with α-level intervals. The slope failure possibility was obtained by non-probabilistic fuzzy reliability analysis method and the possibility theory. In addition, a numerical example of slope instabilities in heavily jointed rock masses was analyzed and the result was evaluated to demonstrate and to check the performance of this approach. Its failure possibility is zero, which matches well with the result 0.12% of Monte Carlo method.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Empirical methods
KW  - Evaluation and assessment
KW  - Fuzzy sets
KW  - Geological strength index
KW  - Rock slopes
KW  - Slope stability
KW  - Uncertainty
UR  - https://trid.trb.org/view/902777
ER  - 

TY  - CONF
AN  - 01142882
AU  - American Society of Civil Engineers
TI  - Material, Design, Construction, Maintenance, and Testing of Pavement: Selected Papers From the 2009 GeoHunan International Conference
SN  - 9780784410455
PY  - 2009
SP  - 195p
AB  - The GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation Geotechnics took place August 3-6, 2009, in Changsha, Hunan, China. Twenty-eight peer-reviewed papers presented at the conference are contained in this geotechnical special publication. A variety of pavement engineering issues are addressed in this book, as well as the very latest research in materials, design, construction, and other areas. This volume includes investigations and solutions from scientists in nations around the world, including Algeria, China, Korea, Pakistan, Saudi Arabia, Taiwan, Turkey, and the United States, with the hope of expanding the range of tools available to scientists and engineers involved in pavement and geotechnical engineering. These papers examine topics such as: pavement testing and evaluation; pavement performance modeling; material characterization; and warm mix asphalt. This book will be of value to highway construction professionals and practitioners, as well as geotechnical and pavement engineers.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Conferences
KW  - Geotechnical engineering
KW  - Hunan (China)
KW  - Materials
KW  - Pavement design
KW  - Pavement maintenance
KW  - Pavement testing
KW  - Paving
UR  - https://trid.trb.org/view/901158
ER  - 

TY  - CONF
AN  - 01142876
AU  - Kessler, K
AU  - American Society of Civil Engineers
TI  - Use of DCP (Dynamic Cone Penetrometer) and LWD (Light Weight Deflectometer) for QC/QA on Subgrade and Aggregate Base
SN  - 9780784410455
PY  - 2009
SP  - pp 62-67
AB  - The DCP (Dynamic Cone Penetrometer) and LWD (Light Weight Deflectometer) are becoming ever more popular as mechanistic-empirical pavement design/construct procedures evolve. These instruments provide the ability to quickly, accurately, and economically measure shear strength and stiffness of in-place base course and subgrade material, thus obviating the need for density testing. These instruments are rugged, portable, easy to operate and do not have the regulatory disadvantages of a Nuclear Density Gauge. This paper outlines the genesis of the DCP for soil testing and the respective applications for various DCP configurations. The various types of LWDs and the results they produce are described. Finally, on going efforts in the use of these instruments as well as standards for QC/QA (Quality Control/Quality Assurance) for subgrade and aggregate base for roads are discussed.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Aggregates
KW  - Cone penetrometers
KW  - Lightweight deflectometers
KW  - Pavements
KW  - Quality assurance
KW  - Quality control
KW  - Subgrade (Pavements)
UR  - https://trid.trb.org/view/901473
ER  - 

TY  - CONF
AN  - 01142875
AU  - Zhou, Zhong
AU  - Nie, Ru-Song
AU  - Liu, Bao-Chen
AU  - Yang, Xiao-Li
AU  - American Society of Civil Engineers
TI  - Study on the Deformation and Evolution Mechanism of Soil-Rock-Mixture Slope under Excavation Disturbance
SN  - 9780784410462
PY  - 2009
SP  - pp 16-23
AB  - In recent years, with the construction of the freeways, large-scale hydro projects and deep foundation pit projects, project accidents aroused by people's excavation are more and more outstanding, especially in western China, an area whose surface is mostly covered by soil-rock-mixture slope, the human project activity has already become the main induced factor of the geologic hazard. Based on in-situ simulation experiment of excavation and 3D finite element method numerical simulation, the deformation and evolution mechanism of soil-rock-mixture landslide under excavation disturbance was studied. The study results show that stability and displacement field of soil-rock-mixture slope are obviously influenced by excavating effect, and most of soil-rock-mixture landslides caused by excavation are shallow draught slope failures.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Deformation
KW  - Evolution (Change)
KW  - Excavation
KW  - Rocks
KW  - Slopes
KW  - Soils
UR  - https://trid.trb.org/view/902519
ER  - 

TY  - CONF
AN  - 01142874
AU  - Yi, Wen
AU  - Wang, Yonghe
AU  - Nie, Yi-hua
AU  - American Society of Civil Engineers
TI  - An Experimental Study on Pulverized Fuel Ash Concrete
SN  - 9780784410455
PY  - 2009
SP  - pp 132-138
AB  - It is well known that the quality of cement concrete highway surface has significant influence on the vehicle running speed. This paper discusses the performance of cement concrete mixed with pulverized coal ash based on the experimental study. Results show that when adding with pulverized coal ash, the anti-booklet intensity will be enhanced, the abrasion resistance can be improved and water gain rates and the cement hydration speed can be cut down effectively. It should be noted that the pulverized coal ash cement concrete must consume massive pulverized fuel ash which will occupy land area and pollute the environment.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Cement
KW  - Coal ash
KW  - Concrete
KW  - Highways
KW  - Pavements
KW  - Pulverized fly ash
UR  - https://trid.trb.org/view/901913
ER  - 

TY  - CONF
AN  - 01142862
AU  - Cheng, Wen-Chieh
AU  - Ni, James-C
AU  - American Society of Civil Engineers
TI  - The Pumping Test Data Analyses of Andesite Rock Blocks Aquifer with Varied Hydraulic Boundaries by Generalized Radial Flow Model
SN  - 9780784410462
PY  - 2009
SP  - pp 64-71
AB  - The aquifer which includes abundant groundwater resources usually exists at toe of foothill where soil profile at the study area consists of soft silty clay, andesite rock blocks with gravelly sand, and bedrock. A series of constant-rate pumping tests were conducted in the aquifer between two impermeable layers to understand its hydrogeology characteristics. Pumping well is located inside of diaphragm wall, and observation wells are scattered inside and outside of it which was completed before these field experiments. In analytical analyses, diaphragm wall is modeled as impermeable boundary and hillside is assumed as constant recharge boundary. The problem that naturally arises when analyzing data from pumping tests is how to select an appropriate geometry for the particular aquifer system into which flow occurs. This study employs the generalized radial flow (GRF) model to analyze constant-rate pumping test data of the andesite rock blocks-based aquifer and to identify its fractional-flow dimensions further assessing aquifer parameters. This study concludes that the GRF model cannot analyze the drawdown response if pumping encountered perpendicular boundaries, and the fractional-flow dimension is not unique while other boundaries applied.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Aquifers
KW  - Data analysis
KW  - Groundwater
KW  - Hydraulics
KW  - Hydrology
KW  - Mathematical models
KW  - Pumping tests
KW  - Rocks
UR  - https://trid.trb.org/view/902893
ER  - 

TY  - CONF
AN  - 01142861
AU  - Tarefder, Rafiqul Alam
AU  - Bateman, Damien
AU  - American Society of Civil Engineers
TI  - Future Design of Perpetual Pavements: Issues and Options
SN  - 9780784410455
PY  - 2009
SP  - pp 177-186
AB  - Perpetual pavements are considered by many pavement experts to be the long-term solution to increasing traffic volumes and related pavement rehabilitation costs and user delay costs. The paper reviews the problems that perpetual pavements are experiencing, such as moisture infiltration/damage, and layer debonding. There is no indication that the pavement design methods presented in this paper account for moisture infiltration/damage or debonding in their designs. This is primarily due to the lack of an appropriate design method, which can include infiltration/damage and debonding in its design. Analysis of current field performances of selected perpetual pavements and mechanistic-empirical predicted performances is also shown. From this analysis, three out of six perpetual pavements are performing better than expected; two pavement sections are performing as predicted, and one pavement section performing worse than expected.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Debonding
KW  - Future
KW  - Moisture damage
KW  - Pavement design
KW  - Pavement layers
KW  - Perpetual pavements
UR  - https://trid.trb.org/view/901985
ER  - 

TY  - CONF
AN  - 01142854
AU  - Xu, Shifa
AU  - Xu, Liting
AU  - Jia, Jonathan
AU  - Xie, Yongqing
AU  - American Society of Civil Engineers
TI  - The Application of Emulsion Warm Mix Asphalt in Long Tunnel Pavement
SN  - 9780784410455
PY  - 2009
SP  - pp 37-42
AB  - Long tunnel asphalt pavement construction, particularly due to the lack of ventilation, still handicaps the construction process in China and even in the world. Based on the actual Emulsion Warm Mix Asphalt (EWMA) long tunnel pavement project, EWMA's characteristics have been studied compared with conventional Hot Mix Asphalt (HMA). Furthermore, EWMA compactibility performance at various compaction temperatures has been evaluated by SGC test. The field pavement performance has been evaluated according to related specifications. The reductions in fuel consumption and gas emission of EWMA have been quantified in contrast to conventional HMA. The study shows that EWMA can reduce 30°C~40°C compaction temperature and have significant lower energy consumption and emission in tunnel construction, and increase about 10 percent rutting resistance compared with conventional HMA. Therefore, EWMA is remarkable material for long tunnel asphalt pavement construction.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Characteristics
KW  - China
KW  - Compactibility
KW  - Energy consumption
KW  - Long tunnels
KW  - Pavements
KW  - Paving
KW  - Temperature
KW  - Warm mix paving mixtures
UR  - https://trid.trb.org/view/901459
ER  - 

TY  - CONF
AN  - 01142853
AU  - Chen, Xianhua
AU  - Huang, Wei
AU  - Yang, Jun
AU  - Wang, Dawei
AU  - American Society of Civil Engineers
TI  - Principles of Designing Asphalt Pavement for Orthotropic Steel Bridge Decks
SN  - 9780784410455
PY  - 2009
SP  - pp 145-154
AB  - The existing studies on distresses in deck pavement indicate further research into the structural behaviours of orthotropic steel bridge decks is necessary to better understand this important issue. In this regard, this paper first presented a brief review of principles for the design of pavement on orthotropic steel plate decks. Second, critical issues including local displacement and negative bending behaviour under truck loading, main distresses in asphalt deck surfacing and their mechanism, and basic requirements for the asphalt surfacing were discussed in detail. Finally, a fatigue based mechanical-experimental design procedure was proposed for the designing of deck pavement. In addition, it is recommended that based on this study, a new theory to accurately describe the composite interaction between asphalt layer and steel deck plates, interaction between asphalt layer's fatigue and bonding membrane damage and their influences, and a more precise performance based design method can be established.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt pavements
KW  - Bending
KW  - Bridge decks
KW  - Displacement (Pavements)
KW  - Orthotropic bridge deck
KW  - Pavement design
KW  - Pavement distress
KW  - Performance based specifications
UR  - https://trid.trb.org/view/901915
ER  - 

TY  - CONF
AN  - 01142848
AU  - Wang, Peng
AU  - Gua, Chengchao
AU  - American Society of Civil Engineers
TI  - The Application of PFWD in Sub-Grade Compactness Test
SN  - 9780784410462
PY  - 2009
SP  - pp 84-91
AB  - Controlling compactness can increase sub-grade capability of resisting deformation and improve the pavement structure strength and stiffness. Portable Falling Weight Deflector (PFWD) has many advantages over the traditional method of testing sub-grade strength. The paper introduces the PFWD technical indexes and researches the PFWD performance in the sub-grade test. The paper researches relations between deflector by PFWD test and compactness on the four sub-grade type, include low liquid limit clay soil and difference proportion cement stabilized soil. The result proves the better linearity relativity between deflector by PFWD test and compactness, The correlation formula between the back-calculate modulus and compactness is educed. Sub-grade compactness can be effectively controlled by PFWD rapid test. The paper provides the new test method and foundation for rapidly and objectively testing compactness. It is practical and theoretical significance for enriching the actual guide regulation.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Compaction
KW  - Compactness
KW  - Falling weight deflectometers
KW  - Linearity
KW  - Pavements
KW  - Portable equipment
KW  - Subgrade (Pavements)
KW  - Testing
UR  - https://trid.trb.org/view/902931
ER  - 

TY  - CONF
AN  - 01142847
AU  - Zhou, Ai-Zhao
AU  - Lu, Ting-Hao
AU  - Gao, Zhuang-Ping
AU  - American Society of Civil Engineers
TI  - Constitutive Model of Soil-Structure Interface under Constant Stress Increment Ratio Stress Paths
SN  - 9780784410462
PY  - 2009
SP  - pp 72-77
AB  - The soil-structure interaction attaches great importance to the stability of embankment and retaining wall in expressway engineering. Based on the simple shear test results of sand-concrete interface under the constant stress increment ratio stress paths (CSIRSP), a nonlinear elastic coupling constitutive model is proposed on purpose for describing the interface deformation behavior, including strain softening and normal dilatancy, as well as the effect of stress paths. In the model, the relation curves of shear stress and tangential strain are fitted by a piecewise function composed by hyperbolic function and hyperbolic secant function, while the relation curves of normal strain and tangential strain are fitted by another piecewise function composed by quadratic function and hyperbolic secant function. Finally, the predictions of the model have been compared with experimental results, and results show the model is reasonable and practical.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Constant stress increment ratio stress paths
KW  - Highway engineering
KW  - Mathematical models
KW  - Soil structure interaction
KW  - Stability (Mechanics)
UR  - https://trid.trb.org/view/902901
ER  - 

TY  - CONF
AN  - 01142845
AU  - Lee, Jeffrey L
AU  - Nam, Boo Hyun
AU  - Stokoe, Kenneth H
AU  - American Society of Civil Engineers
TI  - Improved Testing Speed and Rolling Noise Estimation in Rolling Dynamic Deflectometer Testing
SN  - 9780784410455
PY  - 2009
SP  - pp 31-36
AB  - The Rolling Dynamic Deflectometer (RDD) is a state-of-the-art device that has been used in project-level pavement studies to measure continuous deflection profiles along both highway and airport pavements. Because the RDD deflection measurements are made using contact rolling sensors, the physical and rolling-noise characteristics of the sensors limit the maximum RDD testing speed. In this paper, a two-part study is presented to improve the RDD testing speed and characterization of rolling noise. The first part involves development of second-generation rolling sensors. Field trials using the second-generation rolling sensors on a flexible pavement show significant improvements in testing speed and rolling-noise minimization. The second part involves improving the understanding of the noise that is simultaneously collected with the input RDD signal. This noise is referred to as rolling noise. This effort was achieved by analyzing RDD data collected from numerous project-level studies that involved different deflection levels, pavement surface roughnesses, and testing speeds. These data allowed development of a generalized rolling-noise envelope.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Characterization
KW  - Estimation theory
KW  - Pavements
KW  - Rolling dynamic deflectometers
KW  - Rolling noise
KW  - Testing
UR  - https://trid.trb.org/view/901457
ER  - 

TY  - CONF
AN  - 01142844
AU  - Liu, Xueyan
AU  - Scarpas, A
AU  - Kasbergen, A
AU  - Zhang, W X
AU  - American Society of Civil Engineers
TI  - Development and Application of Constitutive Model for Simulation of Mechanical Behavior of Granular Material
SN  - 9780784410462
PY  - 2009
SP  - pp 24-29
AB  - In this contribution, on the basis of micropolar (Cosserat) continua approach, a constitutive model for simulation of granular material (e.g. sand) response in the elastoplastic range has been presented. Numerical analyses on strain localization in single and two phase materials are carried out in the last part of this contribution. The influence of the additional micropolar parameters and solid-fluid interactions on the formation of strain localization is investigated.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Constitutive models
KW  - Granular materials
KW  - Mechanics
KW  - Numerical analysis
KW  - Sand
KW  - Simulation
KW  - Strain localization
UR  - https://trid.trb.org/view/902738
ER  - 

TY  - CONF
AN  - 01142842
AU  - Zhou, Liang
AU  - Li, Peilong
AU  - Zhang, Zhengqi
AU  - American Society of Civil Engineers
TI  - Investigation of High Temperature Properties of Asphalt Mixture Containing Fibers
SN  - 9780784410455
PY  - 2009
SP  - pp 139-144
AB  - Fibers are extensively used in civil engineering applications for many years. The fibers provide three-dimensional reinforcement of the mixture. The main objective of paper is to evaluate effect of fibers on performances of asphalt mixture at high temperature. Three different fibers were used as modifiers: polypropylene fiber, polyester fiber and cellulose fibers. A SHRP's Dynamic-Shear-Rheometer (DSR) was employed to investigate the rheology property of asphalt-fiber mortar. The wheel tracking device was employed to evaluate rutting resistance of asphalt mixture. The strengthening mechanism in fiber-reinforced asphalt mixture was studied. DSR test results demonstrated that fiber asphalt mortar showed remarkable improvement of properties in comparison with the control asphalt mortar. The wheel tracking test results showed that fiber performed different performance level but showed more resistance to permanent deformation according to the fiber type and fiber contents.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt mixtures
KW  - Cellulose
KW  - Fibers
KW  - High temperature
KW  - Mortar
KW  - Polyester resins
KW  - Polypropylene
KW  - Properties of materials
KW  - Rheology
KW  - Rutting
UR  - https://trid.trb.org/view/901914
ER  - 

TY  - CONF
AN  - 01142840
AU  - Chen, Dar Hao
AU  - Bilyeu, John
AU  - Li, Zheng
AU  - American Society of Civil Engineers
TI  - Field Evaluation of Damages from Super Heavy Load Moves
SN  - 9780784410455
PY  - 2009
SP  - pp 187-192
AB  - The number of superheavy load permits in the last five years has increased by a factor of 13.3. With continued economic development in Texas, superheavy load permits are expected to continue to increase. Significant efforts have been made to monitor, evaluate, and analyze pavement damage caused by the superheavy load moves. This paper documented six cases of pavement surface damage as the result of superheavy load moves. It was found that superheavy loads can cause serious damages to fresh seal coats if not properly routed. Based on these six case histories, it was concluded that seal coats are most vulnerable to damage under one or more of the following factors: (1) time after placement (the first 5 weeks are critical), (2) high temperatures, and (3) steep grades in combination with too few drive axles. The results indicate that even after repairs, the pavement condition is not as good as the original undamaged condition, as the damages are still visible approximately six years after repairs. The findings and lessons learned from these six cases can be used by other transportation authorities to improve their regulations and permitting procedures so that damage caused by superheavy load moves is minimized.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Case studies
KW  - Evaluation and assessment
KW  - Field studies
KW  - Pavement damage
KW  - Seal coats
KW  - Superheavy load
KW  - Texas
UR  - https://trid.trb.org/view/901988
ER  - 

TY  - CONF
AN  - 01142837
AU  - Tao, Zhuohui
AU  - Ni, Fujian
AU  - Yan, Jinhai
AU  - Huang, Wenyuan
AU  - American Society of Civil Engineers
TI  - Evotherm Warm Mix Asphalt Technology Applied on Ultra-Thin Pavement in China
SN  - 9780784410455
PY  - 2009
SP  - pp 171-176
AB  - With the characteristics of Evotherm warm mix asphalt technology introduced, the existing problem about hot mix asphalt technology applied on ultra-thin pavement was put forward. The research on the workability of Evotherm warm asphalt mixture was conducted by measuring the Brookfield dynamic viscosity of Evotherm warm mix asphalt and hot mix asphalt (HMA) at different temperatures, which can guide the mixing and compaction temperature range. Based on test results of laboratory performance, the warm mix asphalt ultra-thin pavement was paved in China at low air temperature. The temperature vs. time curve of Evotherm warm asphalt mixture was derived theoretically by Pavecool® software in advance. The field temperature vs. time curve was also obtained by field test result of Evotherm trial road, which can guide the compaction occasion of the Evotherm warm mixture. The pavement performance of trial road was positive, which demonstrated that the application of Evotherm warm mix asphalt on ultra-thin pavement was successful at low air temperature in China.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt mixtures
KW  - China
KW  - Evotherm
KW  - Pavements
KW  - Planning
KW  - Temperature
KW  - Ultra-thin
KW  - Warm mix paving mixtures
UR  - https://trid.trb.org/view/901972
ER  - 

TY  - CONF
AN  - 01142834
AU  - Mubaraki, Muhammad
AU  - American Society of Civil Engineers
TI  - Predicting Pavement Condition Deterioration for the Saudi Inter-Urban Road Network
SN  - 9780784410455
PY  - 2009
SP  - pp 56-61
AB  - The Ministry of Transport (MOT) in Saudi Arabia uses Pavement Condition Rating (PCR) to report pavement condition. The PCR was developed by the World Bank in 1986. PCR is based on International Roughness Index (IRI), Rutting (RUT), Cracking (CRA), and Raveling (RAV). The MOT collects pavement condition data using a digital inspection vehicle (DIV). On some expressways, the MOT measures the Skid Number (SN) using a Skid Test Unit as complimentary measurement for safety issues. The objective of this paper is to develop a general prediction model for the Saudi Arabia Inter-Urban road network. Two models have been developed for the Inter-Urban road network using 10 years survey data for overlaid sections on some expressways in the network. One model is for PCR and the other one is for IRI. The PCR model is a function of pavement age (T), Traffic Volume (TV), and IRI. The IRI model is a function of RUT, RAV, and CRA. Overlaid sections across the entire network have been selected to study the mechanisms of pavement deterioration, to develop the model and to draw conclusions.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Cracking
KW  - Deterioration
KW  - International Roughness Index
KW  - Mathematical models
KW  - Mathematical prediction
KW  - Pavement age
KW  - Pavement condition rating
KW  - Pavement conditions
KW  - Road networks
KW  - Rutting
KW  - Safety
KW  - Saudi Arabia
KW  - Stripping (Pavements)
KW  - Traffic volume
UR  - https://trid.trb.org/view/901470
ER  - 

TY  - CONF
AN  - 01142833
AU  - Gopalakrishnan, Kasthurirangan
AU  - Ceylan, Halil
AU  - American Society of Civil Engineers
TI  - Adaptive Neuro-Fuzzy Inference System-Based Backcalculation Approach to Airport Pavement Structural Analysis
SN  - 9780784410455
PY  - 2009
SP  - pp 9-16
AB  - This paper describes the application of adaptive neuro-fuzzy inference system (ANFIS) methodology for the backcalculation of airport flexible pavement layer moduli. The proposed ANFIS-based backcalculation approach employs a hybrid learning procedure to construct a non-linear input-output mapping based on qualitative aspects of human knowledge and pavement engineering experience incorporated in the form of fuzzy if-then rules as well as synthetically generated Finite Element (FE) based pavement modeling solutions in the form of input-output data pairs. The developed neuro-fuzzy backcalculation methodology was evaluated using hypothetical data as well as extensive non-destructive field deflection data acquired from a state-of-the-art full-scale airport pavement test facility. It was shown that the ANFIS based backcalculation approach inherits the fundamental capability of a fuzzy model to especially deal with nonrandom uncertainties, vagueness, and imprecision associated with non-linear inverse analysis of transient pavement surface deflection measurements.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Adaptive neuro-fuzzy inference systems
KW  - Airport runways
KW  - Backcalculation
KW  - Flexible pavements
KW  - Mathematical models
KW  - Structural analysis
UR  - https://trid.trb.org/view/901234
ER  - 

TY  - CONF
AN  - 01142830
AU  - Senol, Aykut
AU  - Erol, Bilal
AU  - American Society of Civil Engineers
TI  - 2D Numerical Settlement Analysis of a Slag Aggregated Test Road on Weak Soils
SN  - 9780784410455
PY  - 2009
SP  - pp 119-124
AB  - In the past decade, numerous industrial and public initiatives have been launched in order to make knowledge, practices, and mentalities evolve in relation to the acceptability of using waste instead of raw materials as construction materials (Ahmed, 1993). The objectives of the initiatives have been to evaluate current practices and to make new solutions and channels for beneficial use emerge. At the same time, the scientific and standardization communities have developed methodologies and tools to fit the assessment needs (Sherwood, 2001). This part of the research presents the results of research involving metal slag as the base material for road constructions in Istanbul, Turkey. The design parameters for the roads constructed using the discarded metal slag were presented based on laboratory model studies. Numerical analysis and field performances were also conducted for the metal slag. Groundwater and surface water analyses conducted before and after the construction were taken into consideration. The metal slag contains some compounds that have pollution potential. Although the leachability of most compounds is low (below the maximum limit) for conditions in civil engineering applications, corrosion occurs at the exposed parts of the metal slag in poor drainage conditions. The conclusion of this research supports the view that the selected waste material is an environmentally acceptable base material for use as an alternative soil stabilization method in road construction. Consequently, it is concluded that the usage of metal slag waste material as the base of road construction is possible for every aspect of this research.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Aggregates
KW  - Istanbul (Turkey)
KW  - Road construction
KW  - Settlement (Structures)
KW  - Slag
KW  - Soils
KW  - Test roads
KW  - Two dimensional analysis
KW  - Wastes
UR  - https://trid.trb.org/view/901911
ER  - 

TY  - CONF
AN  - 01142829
AU  - Chen, Cheng
AU  - Ge, Louis
AU  - Zhang, Jia Sheng
AU  - American Society of Civil Engineers
TI  - Modeling Resilient Modulus of Unbound Granular Materials under Repeated Loading
SN  - 9780784410462
PY  - 2009
SP  - pp 9-15
AB  - Resilient modulus of unbound granular materials is a key design parameter for mechanistic empirical pavement design. But the complexity of the affected factors has made it challenging and difficult for practical designers and researchers to find an appropriate model to describe the entire stress-strain response where the plastic deformation is accumulated during the repeated loading condition. A cyclic plasticity model based on fuzzy sets plasticity theory is presented in this paper to model the resilient modulus and permanent strain behavior of unbound granular materials under repeated loading. The concept of the fuzzy set plasticity is first introduced, followed by its model formulation and numerical simulation. The model was calibrated against a resilient modulus testing data of a typical Missouri soil. The numerical results showed that the fuzzy set model is capable of mimicking and simulating the resilient and permanent responses of unbound granular materials under repeated loading.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Deformation curve
KW  - Loads
KW  - Modulus of resilience
KW  - Unbound granular materials
UR  - https://trid.trb.org/view/902507
ER  - 

TY  - CONF
AN  - 01142827
AU  - Johnson, Dona
AU  - Sukumaran, Beena
AU  - American Society of Civil Engineers
TI  - Investigation of the Performance of Flexible Airport Pavements under Moving Aircraft Wheel Loads with Wander Using Finite Element Analysis
SN  - 9780784410462
PY  - 2009
SP  - pp 44-49
AB  - The introduction of larger and heavier aircraft with more complex wheel configurations is making the current design methods inadequate for airfield pavements. In addition, airport pavements experience significant wander. However, the effect of wander on airport pavement performance has not been evaluated. In previous studies, the stress interactions between each tire of a triple-dual-tandem (TDT) axle used on B-777 and A380 aircraft cannot be captured using a two-dimensional model. In addition, many of these studies have assumed a linear-elastic material behavior of the pavement layers. The purpose of this study is to conduct a three-dimensional finite element analysis to quantify and evaluate the effects of wander and aircraft wheel configurations on the mechanical response of the pavement layers. The flexible pavement system that is modeled in this study is comprised of a medium and low strength subgrade. The stress-strain response of the base, subbase, and subgrade layers are simulated using an elasto-plastic model and the asphalt layer is modeled separately as a viscoelastic and elasto-plastic material. The model parameters are validated using results from laboratory and field tests. The results of the study show how flexible airport pavements are affected when wander and complex gear configurations are considered. Correlations between deformations from a single wheel and 4- and 6- wheel configurations are also studied to understand the effect of gear configuration on flexible airport pavements. Where possible, the results from the analysis are also compared against full scale results available from the National Airport Pavement Test Facility (NAPTF).
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Aircraft
KW  - Airports
KW  - Finite element method
KW  - Flexible pavements
KW  - Live loads
KW  - Three-dimensional models
KW  - Wheel loads
KW  - Wheel wander
UR  - https://trid.trb.org/view/902787
ER  - 

TY  - CONF
AN  - 01142824
AU  - Zhao, Heng
AU  - Cao, Wen-Gui
AU  - Zhang, Ling
AU  - American Society of Civil Engineers
TI  - A Dynamic Damage Statistical Constitutive Model of Rock Considering Strain Rate under Uniaxial Loading Conditions
SN  - 9780784410462
PY  - 2009
SP  - pp 78-83
AB  - Considering the dynamic deformation characteristics of rock and introducing the Kelvin model which consists of a viscous element and a paralleled elastoplastic element, a mechanical analysis model for rock under uniaxial loads is developed. This new model can take the influence of loading speed (or strain rate) and the dynamic behavior of rock into account. Based on that, with consideration of the influence of strain rate and volume change, a damage statistical constitutive model with the property of visco-elastoplastic is proposed by the statistical damage theory. Moreover, a method to determine the model parameters is presented. Finally, the proposed model is used to a practical problem, whose theoretical results are illustrated and compared to those of experiments. It is shown that the proposed constitutive model is effective to describe the characteristics of strength and elastic modulus of rock increasing with the increase of strain rate, and to simulate the dynamic deformation process of rock in uniaxial stress state.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Damage models
KW  - Deformation curve
KW  - Dynamic models
KW  - Mechanical loads
KW  - Rocks
KW  - Statistical models
KW  - Strain rate
UR  - https://trid.trb.org/view/902925
ER  - 

TY  - CONF
AN  - 01142819
AU  - Huang, Baoshan
AU  - Shu, Xiang
AU  - American Society of Civil Engineers
TI  - Correlating APA to Field Permanent Deformation for HMA Mixes at the NCAT Test Track
SN  - 9780784410455
PY  - 2009
SP  - pp 25-30
AB  - This paper presents the findings from a study in which a common type of Loaded Wheel Tester (LWT), the Asphalt Pavement Analyzer (APA), was used to evaluate the rutting characteristics of HMA mixtures at the Oval Test Track at the National Center for Asphalt Technology (NCAT). Mixtures from twenty six test sections were tested by APA. The specimens used for APA tests included the laboratory compacted cylindrical samples through the Superpave Gyratory Compactor (SGC) at four and seven percent air voids. The results from this study indicated that APA rutting at 500 cycles correlated strongly to the final APA rut depth at 8,000 cycles. Regression analyses revealed that the APA rutting for SGC-compacted specimens at seven percent air voids correlated reasonably well (R2 = 0.64) to the field measured rut depths; whereas the APA results from lab-compacted specimens at four percent air voids had a weak correlation (R2 = 0.20) to the field rutting measurement. Based on the results from this study, it was suggested that for QC/QA purposes, the number of cycles in APA rutting tests might be significantly reduced from the current 8,000 cycles. Specimens at seven percent air voids were recommended for rutting evaluation.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt Pavement Analyzer
KW  - Hot mix asphalt
KW  - National Center for Asphalt Technology
KW  - Permanent deformation
KW  - Rutting
KW  - Testing
UR  - https://trid.trb.org/view/901454
ER  - 

TY  - CONF
AN  - 01142815
AU  - Hongxin, Guan
AU  - American Society of Civil Engineers
TI  - A Discussion on the Optimum Bonding Condition between Semi-Rigid Base and Asphalt Surface Course
SN  - 9780784410455
PY  - 2009
SP  - pp 68-74
AB  - The influence of bonding condition between surface course and uncracked base course on pavement structure mechanical response has been studied for many years. All research indicates that the bonding condition should be firm as far as possible to decrease the flexural stress at bottom of layers. It is inevitable for semi-rigid base course to crack due to temperature shrinkage and moisture shrinkage. Shear stress at crack tip due to offset load applying on one side of crack was calculated at different friction coefficient between surface course and cracked base course. Flexural stress at crack tip due to temperature dropping was also calculated at different friction coefficient between surface course and cracked base course. The calculated data show that shear stress and flexural stress at crack tip both increase when the friction coefficient increases, which indicates that the bonding condition should be as smooth as possible for cracked pavement structure. For actual pavement structure, there exists uncracked section between two adjacent cracks. It is discussed based on stress data to estimate which section cracks firstly. The results indicate that there exists the optimum bonding condition between surface course and base course.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt
KW  - Base course (Pavements)
KW  - Bonding
KW  - Cracking
KW  - Optimization
KW  - Semi-rigid
KW  - Strain measurement
KW  - Surface course (Pavements)
UR  - https://trid.trb.org/view/901474
ER  - 

TY  - CONF
AN  - 01142814
AU  - American Society of Civil Engineers
TI  - Soils and Rock Instrumentation, Behavior, and Modeling: Selected Papers From the 2009 GeoHunan International Conference
SN  - 9780784410462
PY  - 2009
SP  - 109p
AB  - The GeoHunan International Conference on Challenges and Recent Advances in Pavement Technologies and Transportation Geotechnics was held in Hunan, China, from August 3-6, 2009. Fifteen peer-reviewed papers presented at the conference are compiled in this American Society of Civil Engineers' Geotechnical Special Publication (GSP). The papers were presented during the Soils and Rock Instrumentation, Behavior and Modeling session. In many parts of China, recent construction has provided great opportunities for creating cutting edge solutions to problems involving tunnels, excavations, slopes, ground improvement, and foundations for geotechnical engineers. Engineers and professionals involved in many geotechnical engineering aspects will find this GSP valuable.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - American Society of Civil Engineers
KW  - Conferences
KW  - Excavations
KW  - Foundation soils
KW  - Geotechnical engineering
KW  - Ground
KW  - Rocks
KW  - Slopes
KW  - Soils
KW  - Tunnels
UR  - https://trid.trb.org/view/902505
ER  - 

TY  - CONF
AN  - 01142813
AU  - Feng, Xinjun
AU  - Gao, Zhuo
AU  - Hao, Peiwen
AU  - American Society of Civil Engineers
TI  - Comparative Study on GTM Method and Marshall Mixes Design Method for Large Stone Asphalt Mixes
SN  - 9780784410455
PY  - 2009
SP  - pp 106-111
AB  - Three types of aggregate gradation with different nominal maximum size were designed by Bailey method for large stone asphalt mixes (LSAM). The optimum asphalt content was then determined by Gyratory Testing Machine (GTM) method and Marshall method, respectively. A series of tests were carried out to investigate the performance of the obtained LSAM. The optimum asphalt content (OAC), volume of voids (VV), voids in mineral aggregate (VMA) and voids filled with asphalt (VFA) of specimens prepared by GTM method showed smaller values whereas bulk density is larger. Furthermore, higher temperature stability and poorer crack resistance at low temperature of the former can also be observed.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt content
KW  - Comparative analysis
KW  - Gyratory testing machines
KW  - Large stone asphalt mixtures
KW  - Marshall mix design
KW  - Optimization
KW  - Temperature
KW  - Voids
UR  - https://trid.trb.org/view/901888
ER  - 

TY  - CONF
AN  - 01142811
AU  - Zhang, Bin
AU  - Zhang, Jie
AU  - American Society of Civil Engineers
TI  - Temperature Calibration of EICM Model in New Mexico
SN  - 9780784410455
PY  - 2009
SP  - pp 93-99
AB  - The Enhanced Integrated Climate Model (EICM) is a program that integrates most of the climate conditions to simulate climate effects on pavements. It was originally designed for all regions in the United States. However, it was proposed on the basis of the nation wide average climate data and not accurate for regional conditions. Therefore, it is necessary to calibrate the EICM using local climate data before its application by state DOTs and other agencies. In the State of New Mexico, because of its special climate condition, the calibration of EICM is very important. In this paper, the EICM was used to predict pavement temperature profile with the input data obtained from the LTPP Datapave. Then the EICM-predicted temperatures were compared with the measured temperatures to validate the feasibility of the current EICM in New Mexico. Finally, the correlation between the EICM-predicted and measured temperatures is provided.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Calibration
KW  - Climate
KW  - Enhanced Integrated Climate Model
KW  - New Mexico
KW  - Pavements
KW  - Temperature
UR  - https://trid.trb.org/view/901881
ER  - 

TY  - CONF
AN  - 01142809
AU  - Yan, Wang
AU  - Fujian, Ni
AU  - Weihong, Xuan
AU  - American Society of Civil Engineers
TI  - Research on Dry-Shrinkage Performance of Cement-Treated Base Materials
SN  - 9780784410455
PY  - 2009
SP  - pp 81-86
AB  - Shrinkage cracks are easy to occur in cement-treated macadam base when temperature and humidity change. In order to study the drying shrinkage and cracking performance of different cement-stabilized macadam base materials, dry-shrinkage performance tests were carried out by mixing the cement-stabilized macadam mixture with different gradations and cement dosages, ranging from 2% to 5%. Hence, a model for evaluating the dry-shrinkage performance of cement-stabilized macadam mixture was made on the basis of the mixture's dry-shrinkage performance's relationship with water loss rate, exposure time, cement dosage, gradation and other elements. The experiment shows that the mixture's dry-shrinkage performance is the best when mixed with fine gradations and the cement is added by 3% to 4%.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Base course (Pavements)
KW  - Cement
KW  - Macadam
KW  - Shrinkage
KW  - Shrinkage cracking
KW  - Testing
UR  - https://trid.trb.org/view/901837
ER  - 

TY  - CONF
AN  - 01142802
AU  - Yu, Xiao-jun
AU  - Shi, Jian-Yong
AU  - American Society of Civil Engineers
TI  - Research on the Disturbed State Concept for Soft Clay Roadbed
SN  - 9780784410462
PY  - 2009
SP  - pp 92-98
AB  - With the rapid development of the economy in China, more and more highways and railways are being constructed in areas with soft soil. As a result, geotechnical engineers encounter many difficulties in dealing with stability and deformation problems of soft roadbeds. The significance of a disturbed state concept for soft clay is presented. Based on the tests, the preparation method of the soft clay samples with the different degrees of disturbance is illustrated. In addition, an electrical resistivity method is introduced to define and measure the disturbed variable, and a formulation for the development of disturbance is established. Also, an advanced disturbed state concept constitutive model is proposed. Finally, results from triaxial drained triaxial shear tests show that the advanced model can describe the stress-strain characteristics of soft clay.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - China
KW  - Deformation curve
KW  - Disturbed state concept
KW  - Geotechnical engineering
KW  - Mathematical models
KW  - Soft clays
KW  - Soft soils
KW  - Subgrade (Pavements)
KW  - Testing
UR  - https://trid.trb.org/view/902933
ER  - 

TY  - CONF
AN  - 01142801
AU  - Liu, Yan
AU  - Yu, Xinbao
AU  - Yu, Xiong
AU  - American Society of Civil Engineers
TI  - Measurement of Soil Air Suction Change during Freezing-Thawing Process
SN  - 9780784410462
PY  - 2009
SP  - pp 36-43
AB  - This paper introduces a new instrument and experimental procedure that estimates the change of air suction in soils during the freeze-thaw process. The experimental procedures include a nondestructive measurement by Time Domain Reflectometry (TDR) sensor, which captures the freezing-thawing status. The change of air suction causes change of soil volume, which is estimated from the volume change and soil deformation modulus. The experimental data indicates there is a graduated decrease in the magnitude of the negative air suction, which resulted in volume expansion in soils. The observed bulk volume change is the combined effects of the volume contraction due to ice melting and the volume expansion due to the reduction in the negative air suction. The magnitude of air suction reduction estimated is achieved by fusion of the information from both mechanical and electromagnetic measurement.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Freeze thaw durability
KW  - Measurement
KW  - Soil air
KW  - Soil suction
KW  - Time domain reflectometers
KW  - Volume
UR  - https://trid.trb.org/view/902782
ER  - 

TY  - CONF
AN  - 01142797
AU  - Ge, Zhi
AU  - Wang, Kejin
AU  - Gao, Zhili
AU  - American Society of Civil Engineers
TI  - Properties and Early-Age Cracking Potential of Blended Cement Concrete
SN  - 9780784410455
PY  - 2009
SP  - pp 163-170
AB  - Stress due to the temperature and moisture gradients in concrete slab often causes pavement curling and warping that may further cause concrete crack if the slab is under restraint conditions. The adding of supplementary cementitious materials (SCMs) can reduce the risk of cracking by reducing the temperature stress. However, under cold weather condition, the slower strength development due to SCMs could increase the risk. This paper reported a study result of using blended cement to reduce such a risk. In this study, the properties of ternary cement concrete, such as setting time, heat of hydration, and datum temperature, were investigated. The risk of early-age cracking for different concrete mixes under different weather conditions was evaluated by the HIPERPAV. The test results indicated that fly ash replacement generally increases the setting time; while the slag replacement reduced the setting time. Both fly ash and slag replacement reduced the generated heat. When the amount of slag increased, the datum temperature and activation energy increased. HIPERPAV analysis indicated that there was little risk of early-age cracking for binary or ternary cement concrete under average summer weather conditions due to proper strength development of the concrete. However, the risk of early-age cracking for the concrete pavement increased under spring or fall weather conditions.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Admixtures
KW  - Blended cement
KW  - Cementitious materials
KW  - Concrete
KW  - Early age cracking
KW  - Fly ash
KW  - Properties of materials
KW  - Risk assessment
KW  - Setting (Concrete)
KW  - Slag
KW  - Strength of materials
KW  - Stresses
KW  - Supplemental materials
UR  - https://trid.trb.org/view/901970
ER  - 

TY  - CONF
AN  - 01142793
AU  - Boudlal, Omar
AU  - Melbouci, Bachir
AU  - American Society of Civil Engineers
TI  - Study of the Behavior of Aggregates Demolition by the Proctor and CBR tests
SN  - 9780784410455
PY  - 2009
SP  - pp 75-80
AB  - The present study is a part of a large project on the valorisation of concrete demolition aggregates in order to contribute to their re-use in the field of the civil engineering, particularly in roads. After the recycled aggregates are sorted and selected, their characterization is based on the comparison of their physical and mechanical behaviors with the natural aggregates (sand and gravel). Then their responses under the Proctor and the CBR tests are studied before and after treatment with sand, cement and clay additions. However, the results obtained showed that the characteristics of the recycled aggregates are lower than those of the natural aggregates. The authors thought then to improve them by the additions quoted herebefore. The addition of these materials, allowed to appreciably ameliorate some of their physical and mechanical characteristics approaching those obtained for the natural aggregates.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Aggregates
KW  - California bearing ratio
KW  - Demolition
KW  - Gravel
KW  - Proctor compaction test
KW  - Recycled materials
KW  - Sand
KW  - Testing
UR  - https://trid.trb.org/view/901808
ER  - 

TY  - CONF
AN  - 01142790
AU  - Walubita, Lubinda F
AU  - Scullion, Tom
AU  - Leidy, Joe
AU  - American Society of Civil Engineers
TI  - Workability of the 25 mm-NMAS Stone Fill HMA Mixes
SN  - 9780784410455
PY  - 2009
SP  - pp 49-55
AB  - As of 2001, the Texas Department of Transportation (TxDOT) has been using a 25 mm nominal maximum aggregate size (NMAS) Stone Fill HMA (SFHMA) mix as the main structural rut-resistant layer in perpetual pavement structures. The SFHMA mix-design basically consists of moderately low asphalt-binder content with a relatively stiff performance-graded (PG) asphalt-binder on the order of about 4.2% content and a 25 mm NMAS coarse aggregate gradation. To date, over eight different SFHMA mix-designs have been utilized on different in-service perpetual pavement projects in Texas. The objective of the work presented in this paper was to review and document the workability characteristics of these coarse SFHMA mixes as observed both in the laboratory (during mix-design and material property characterization) and in the field (during construction). In general, these SFHMA mixes were found to have poor workability characteristics. Remedial measures as employed both in the lab and field to improve the SFHMA mix workability and other material property characteristics are also presented in the paper.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt
KW  - Binders
KW  - Hot mix asphalt
KW  - Nominal maximum aggregate size
KW  - Pavements
KW  - Texas Department of Transportation
KW  - Workability
UR  - https://trid.trb.org/view/901467
ER  - 

TY  - CONF
AN  - 01142789
AU  - Chang, Jia-Ruey
AU  - Chao, Sao-Jeng
AU  - American Society of Civil Engineers
TI  - Evaluations of Rehabilitation Strategies Using Grey Relational Analysis for Specific Pavement Study-5 Sites in the LTPP Program
SN  - 9780784410455
PY  - 2009
SP  - pp 17-24
AB  - Within the context of the long-term pavement performance (LTPP) program, the purpose of the specific pavement studies-5 (SPS-5) experiment is to analyze the rehabilitation of asphalt concrete (AC) pavements. Most of the existing literature related to SPS-5 experiments addresses the effects of overlay thickness, overlay mix type, and pre-overlay preparation on the performance of AC pavements. A complete evaluation of the eight test sections (i.e., eight rehabilitation strategies) at one SPS-5 site is lacking in existing reports. In this study, grey relational analysis (GRA) was employed successfully to conduct studies on four SPS-5 sites in California, Colorado, New Jersey, and Texas, which are located in four climate regions. The long-term data of International Roughness Index (IRI), rutting, and three distresses (including longitudinal cracks, alligator cracks, and transverse cracks) were used to determine the effectiveness of eight rehabilitation strategies. The resulting ranking in effectiveness of rehabilitation strategies used in this study aligns well with the existing literature. With GRA the effectiveness of rehabilitation strategies can be quantified while depending less on engineering judgment. Evaluations based on the GRA provide a viable alternative for engineers when determining the best rehabilitation strategies for comprehensive LTPP or other studies.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt concrete pavements
KW  - Grey relational analysis
KW  - Pavements
KW  - Rehabilitation (Maintenance)
KW  - Specific Pavement Studies (LTPP)
UR  - https://trid.trb.org/view/901249
ER  - 

TY  - CONF
AN  - 01142786
AU  - Zhang, Chun-shun
AU  - Wang, Yong-He
AU  - Xiao, Hong-bin
AU  - American Society of Civil Engineers
TI  - Numerical Simulation of Soil-Pile Interaction in Expansive Soils Foundation
SN  - 9780784410462
PY  - 2009
SP  - pp 99-105
AB  - Analytic solution of load-transfer for single pile in expansive soil is completed based on shear-deformation method and superposition principle (Fan et al., 2007). As a complement of the research work, the numerical simulations have been done based on corresponding program in this paper. The results are shown as follows: increasing of pile length is able to effectively decrease the upward pile movement, but meanwhile, tensile forces of pile shaft increase as well; pile with small diameter (d  0.044L) can effectively reduce the upward pile movements in expansive soils while those piles with the diameter over 0.045L contribute little if not in vain; the applied load that act on pile-top for preventing upward pile movement depend on maximum swelling force, varying from different pile length and influenced zone; As irrigation proceeds, both the pile shaft displacement and tensile force increase while the increments of the both keep decreasing at the same interval. Given enough time, soils' swelling tends to be stable and so do the displacements and tensile forces of the pile shaft.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Dislocation (Geology)
KW  - Foundation soils
KW  - Load transfer
KW  - Simulation
KW  - Soil pile interaction
KW  - Swelling soils
KW  - Tensile properties
UR  - https://trid.trb.org/view/902934
ER  - 

TY  - CONF
AN  - 01142785
AU  - Ni, James-C
AU  - Cheng, Wen-Chieh
AU  - American Society of Civil Engineers
TI  - Grout Efficiency of Lifting Structure in Soft Clay
SN  - 9780784410462
PY  - 2009
SP  - pp 1-8
AB  - An inclined eight-story reinforced concrete building on a thick soft clay deposit was leveled by compensation grouting with short gel time grout injected through sleeved pipes. The monitoring system is used to record the injected grout volume, the mat foundation's heaved volume after grouting, and the mat foundation's settled volume during pore pressure dissipation. The grouting efficiencies improved from negative value to less than one, and the stress histories of clay soils changed from normally consolidated to over-consolidated. A final compensation efficiency of 9.78% was achieved and the building was successfully leveled.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Efficiency
KW  - Grout
KW  - Mat foundations
KW  - Reinforced concrete
KW  - Soft clays
KW  - Structures
UR  - https://trid.trb.org/view/902506
ER  - 

TY  - CONF
AN  - 01142782
AU  - Kim, Chan-Kee
AU  - Hwang, Woong-Ki
AU  - Choi, Yongkyu
AU  - Lee, Minhee
AU  - Kim, Tae-Hyung
AU  - American Society of Civil Engineers
TI  - Characteristics of Pore Pressure and Volume Change during Undrained Loading of Unsaturated Compacted Granite Soil
SN  - 9780784410462
PY  - 2009
SP  - pp 50-56
AB  - A series of triaxial compression tests were performed on samples of compacted granite soils in a modified triaxial cell that can separately control pore air pressure and pore water pressure in order to examine the characteristics of pore pressure, volume change and stress-strain behavior under undrained loading condition. Unsaturated granite soil samples were prepared by compaction in a mould. These samples were tested at different suction and different confining stresses. The volume change of an unsaturated soil during shearing undrained is much sensitive to the confining pressure compared to the initial water content, and the matric suction. The volume expands during shearing, and the volumetric strain is much larger at the smaller confining pressure and at the higher matric suction. The variation of the internal frictional angle according to the initial water content and the matric suction is negligible, but the effective cohesion increases according to matric suction.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Granite
KW  - Mechanical loads
KW  - Pore air pressure
KW  - Pore pressure
KW  - Pore water pressures
KW  - Soils
KW  - Volume changes
UR  - https://trid.trb.org/view/902791
ER  - 

TY  - CONF
AN  - 01142781
AU  - Ren, Ruibo
AU  - Li, Hiwen
AU  - Wang, Zheren
AU  - American Society of Civil Engineers
TI  - Analysis of Semi-Rigid Asphalt Pavement with Flexible Base as a Sandwich Layer
SN  - 9780784410455
PY  - 2009
SP  - pp 155-162
AB  - Reflective cracking is one of main distresses for cement/lime/fly ash stabilized base in China. Although flexible base can be and has been utilized as sandwich layer to reduce reflecting cracks from stabilized base, the repetitive truck traffic load may cause higher tensile stress at the bottom of asphalt surface course because of large deformation from flexible base. The high tensile stress may lead to fatigue cracking. To minimize the tensile stress at the bottom of the asphalt layer and to establish optimum structures to reduce reflective cracking, nonlinear finite element technique was utilized to support three experimental pavements in Tonghua Highway in Jilin province. Based on the analyses, pavement structures 1 and 2 are recommended. In addition, for pavement structure 1, the optimal design is to include 7–12 cm of AM-30, 10–15 cm of flexible base, and 30–45 cm of semi-rigid subbase (lime-fly ash stabilized soil or cement treated base). Furthermore, for pavement structure 2, the optimal design is to include 15–20 cm of flexible base, and 25–40 cm of semi-rigid subbase (lime-fly ash stabilized base or cement treated base).
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Analysis
KW  - Asphalt pavements
KW  - Base course (Pavements)
KW  - China
KW  - Flexibility
KW  - Optimization
KW  - Pavement design
KW  - Pavement layers
KW  - Reflective cracking
KW  - Sandwich construction
KW  - Semi-rigid
KW  - Tensile strength
UR  - https://trid.trb.org/view/901961
ER  - 

TY  - CONF
AN  - 01142776
AU  - Chen, Qingfa
AU  - Zhou, Keping
AU  - Gao, Feng
AU  - American Society of Civil Engineers
TI  - Sonic Wave Testing Technique in Lamellar Rock Mass
SN  - 9780784410462
PY  - 2009
SP  - pp 57-63
AB  - Sonic wave testing technique is the most commonly used one for ascertaining the loosening zone of roadway surrounding rock, but it has a great limitation in lamellar rock mass. For overcoming the limitation, the problems of sonic wave testing boreholes arrangement mode were studied. Firstly, the theoretical bases of the testing boreholes arrangement in inclined lamellar rock mass were analyzed on the basis of the mechanical characteristics and the propagation rule of sonic wave in layered rock mass. Secondly, three principles of sonic wave testing boreholes arrangement were summarized from numerous testing experiences on field. Then, new arrangement modes in four representative lamellar rock mass (dip angle was respectively 0°, 15°, 45° and 90°) were proposed. The testing results from the engineering example with the gently inclined lamellar rock mass showed the improved arrangement mode could determine the scope of the loosening zone quickly.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Boreholes
KW  - Rock mass
KW  - Sonic tests
UR  - https://trid.trb.org/view/902879
ER  - 

TY  - CONF
AN  - 01142775
AU  - Hwang, Sang-Min
AU  - Rhee, Suk-Keun
AU  - Kim, Seong-Min
AU  - American Society of Civil Engineers
TI  - Establishment of Performance Related Specifications Using Pay Factors and Relationship between Fatigue Cracking and Pay Factors
SN  - 9780784410455
PY  - 2009
SP  - pp 87-92
AB  - This study aims to address the development of performance based payment adjustment methods. First, this study describes the cases in which the pay adjustment has been applied and influential factors used in forty states of U.S. Based on those preliminary studies, it has been determined that the applicable factors that can be used for the pay adjustment of asphalt pavements in Korea. This study develops a more systematic and reliable algorithm that can be trusted by both builder and vendee. The percent within limit (PWL) has been analyzed as a rational estimation and measurement tool for asphalt pavements. The correlation between fatigue cracking and pay adjustment factors has also been investigated in this study. The fatigue life was increased or decreased due to changing asphalt content, density and gradation.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Algorithms
KW  - Asphalt pavements
KW  - Fatigue cracking
KW  - Pay factors
KW  - Payment
KW  - Performance based specifications
KW  - Relationships
KW  - South Korea
KW  - United States
UR  - https://trid.trb.org/view/901871
ER  - 

TY  - CONF
AN  - 01142772
AU  - Wu, Yingbiao
AU  - Guo, Yanfang
AU  - Zhang, Xiuli
AU  - American Society of Civil Engineers
TI  - Application of Recycled Brick-Stone Aggregate in Road Base
SN  - 9780784410455
PY  - 2009
SP  - pp 43-48
AB  - Construction rubbish including waste bricks and concrete blocks, can be recycled into brick-stone aggregate through pre-screening, crushing, screening and blending. Using proper mix proportions of lime-fly ash, cement, or cement-fly ash stabilizes the material which can then be used as pavement base material. The unconfined compressive strength, modulus, frost resistance and anti-brushing performance of this recycled material can meet the required specifications. Through three experimental sections, the conclusion above is validated.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Base course (Pavements)
KW  - Brick
KW  - Brush
KW  - Compressive strength
KW  - Frost resistance
KW  - Modulus
KW  - Recycled materials
KW  - Stone
KW  - Testing
UR  - https://trid.trb.org/view/901460
ER  - 

TY  - CONF
AN  - 01142770
AU  - Estakhri, Cindy K
AU  - Cao, Rongji
AU  - Alvarez-Lugo, Allex
AU  - Button, Joe W
AU  - American Society of Civil Engineers
TI  - Production, Placement, and Performance Evaluation of Warm Mix Asphalt in Texas
SN  - 9780784410455
PY  - 2009
SP  - pp 1-8
AB  - This paper documents the first warm mix asphalt field trial placed by the Texas Department of Transportation in 2006 using the emulsion based technology (Evotherm) developed by MeadWestvaco. The production, laydown, and compaction characteristics of warm mix were compared with a conventional hot mix asphalt control using a standard mixture design. Field-mixed, lab compacted samples were evaluated for production density, moisture susceptibility and cracking resistance. Field cores were obtained after one month and one year of service and evaluated using Hamburg Wheel-Tracking Tests and the TTI Overlay test. Cores were also evaluated using X-Ray computed tomography to determine the distribution of air voids versus depth in the compacted sample. Field performance of the warm mix is comparable to the hot mix control section after two years of service.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt emulsions
KW  - Compaction
KW  - Cracking
KW  - Evaluation and assessment
KW  - Evotherm
KW  - Moisture susceptibility
KW  - Placement (Material)
KW  - Texas
KW  - Warm mix paving mixtures
UR  - https://trid.trb.org/view/901174
ER  - 

TY  - CONF
AN  - 01142768
AU  - Dafalla, M A
AU  - American Society of Civil Engineers
TI  - Improvement of Coastal Silty Sand of Saudi Arabia Using Preloading Technique
SN  - 9780784410455
PY  - 2009
SP  - pp 100-105
AB  - The subsurface formation at sites along the western Red Sea coast of Saudi Arabia often has loose to medium dense silty sand at several parts. This type of material was encountered at levels immediately below the foundation depth commonly used in practice. These soils undergo excessive settlement due to supporting concrete structures, slab on grade systems and pavement structures. This work was aimed at studying the improvement provided by preloading technique to these coastal deposits. Technical College Building Complex site located at Al Qunfoda was selected for this study. The site was preloaded using 4.5 to 6m height of sand over six month period. The settlement was monitored every week throughout the period of preloading. The density and compressibility of the formation were noted to improve in different stages; an initial fast stage occurring within the first four weeks, intermediate stage which continued for 12 weeks and a slow stage which is noted to continue for more than 26 weeks. A final stable stage is considered when no variation in settlement can be reported over a satisfactory period. The process improved the site and established a close to uniform density across the area studied. Plate load tests carried out on improved areas confirmed that the settlement after preloading was reduced to tolerable limits for a particular foundation stress range. This paper provides a guide for monitoring, verification and decision making tool for practicing geotechnical engineers.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Coasts
KW  - Compressibility
KW  - Density
KW  - Preloading
KW  - Red Sea
KW  - Saudi Arabia
KW  - Silty sands
UR  - https://trid.trb.org/view/901884
ER  - 

TY  - RPRT
AN  - 01142611
AU  - Kittelson and Associates, Incorporated
AU  - Federal Highway Administration
TI  - Traffic Signal Timing Manual: Institute of Transportation Engineers Edition
SN  - 9781933452487
PY  - 2009///ITE Edition
SP  - 261p
AB  - This "Traffic Signal Timing Manual" (TSTM) is intended to be a comprehensive guide to the traffic signal timing engineer and technician on traffic signal control logic principles, practices, and procedures.  The TSTM presents a synthesis of traffic signal timing concepts, analytical procedures, and applications based on North American practice in a single publication.  The manual also presents a framework for evaluating traffic signal timing applications related to maintenance and operations.  The manual is organized into nine chapters that can be broadly described by four basic parts:  Part 1 - Policy, Planning, and Funding Considerations (Chapter 2); Part 2 - Fundamental Concepts of Capacity (Chapter 3) and Traffic Signal Design (Chapter 4); Part 3 - Signal Timing Concepts, Guidelines, and Application and Coordination Plan Development (Chapters 5, 6, and 7); and Part 4 - Maintenance of Timing (Chapter 8) and Advanced Topics (Chapter 9).
KW  - Financing
KW  - Guidelines
KW  - Highway capacity
KW  - Manuals
KW  - Planning
KW  - Policy
KW  - State of the practice
KW  - Technological innovations
KW  - Traffic signal control systems
KW  - Traffic signal timing
UR  - https://trid.trb.org/view/903034
ER  - 

TY  - RPRT
AN  - 01142465
AU  - Carroll, A A
AU  - Haines, M J
AU  - Research and Innovative Technology Administration
AU  - Federal Highway Administration
TI  - 2003 Highway-Rail Grade Crossing Safety Research Needs Workshop. Volume 2: Appendices
PY  - 2009///Final Report
SP  - 172p
AB  - The purposes of the workshop were to provide up-to-date information and research reports from selected organizations, analyze a number of safety research topics by a selected group of delegates from all areas of technology and government organizations associated with the rail industry, and define a new practical list of research needs for the Highway-Rail at Grade Crossing Safety Program of the Federal Railroad Administrations Office of Research and Development and Office of Safety in coordination with other organizations having similar needs.
KW  - Countermeasures
KW  - Fatalities
KW  - Railroad grade crossings
KW  - Railroad safety
KW  - Railroad transportation
KW  - Research
KW  - Workshops
UR  - http://www.fra.dot.gov/Elib/Document/376
UR  - http://ntl.bts.gov/lib/34000/34500/34527/DOT-VNTSC-FRA-07-07-II.pdf
UR  - https://trid.trb.org/view/902707
ER  - 

TY  - CONF
AN  - 01142241
AU  - Greaves, Stephen P
AU  - American Society of Civil Engineers
TI  - A Strategic-Level Modeling Tool for Evaluating Air Quality and Greenhouse Gas Mitigation Strategies for Urban Road Freight in Sydney
SN  - 9780784410592
PY  - 2009
SP  - pp 19-30
AB  - This paper details the development of a strategic-level modeling tool to evaluate the impacts of air quality and greenhouse gases mitigation strategies for urban freight. The model, known as STEAR-F (Strategic Environmental Analysis of Road Freight) combines publicly available information on freight travel, fleet characteristics, and emission factors to provide estimates of total greenhouse gases (GHG) and non-GHG emissions. Following details of the model development and underlying assumptions, STEAR-F is applied to evaluate strategies currently under consideration in the Sydney region. These include accelerated vehicle scrappage programs, diesel vehicle retrofit programs, low emissions zones, alternative fuel programs, and educational/information programs focused on driver behavior, new technologies and proactive vehicle maintenance.
U1  - 2009 Transportation, Land Use, Planning, and Air Quality ConferenceAmerican Society of Civil EngineersFederal Highway AdministrationTransportation Research BoardCenter for Transportation Research and EducationUniversity of North Carolina, CharlotteDenver,Colorado,United States StartDate:20090725 EndDate:20090729 Sponsors:American Society of Civil Engineers, Federal Highway Administration, Transportation Research Board, Center for Transportation Research and Education, University of North Carolina, Charlotte
KW  - Air quality
KW  - Alternate fuels
KW  - Diesel engine exhaust gases
KW  - Environmental impacts
KW  - Freight modeling
KW  - Freight traffic
KW  - Freight transportation
KW  - Greenhouse gases
KW  - Strategic planning
UR  - https://trid.trb.org/view/902071
ER  - 

TY  - CONF
AN  - 01142240
AU  - Li, Ningli
AU  - Li, Tiehu
AU  - Chen, Huaxin
AU  - Zhang, Zhengqi
AU  - American Society of Civil Engineers
TI  - Evaluation of Low-Temperature Properties of Long-Term-Aged Asphalt Mixtures
SN  - 9780784410479
PY  - 2009
SP  - pp 143-150
AB  - Asphalt aging is an important factor to cause pavement cracking. Currently, researchers primarily conduct ageing tests on asphalt binder to study the ageing effect on asphalt pavements. However, the ageing effect is also dependent on the air void and aggregate properties. Therefore, this paper conducted ageing tests on asphalt mixtures to account for the influences of ageing effect on in-situ pavements. The low-temperature, anti-cracking (LTAC) properties of both plain asphalt mixtures and polymer-modified asphalt mixtures were investigated. Laboratory flexural and flexural creep tests were conducted on the beam specimens of asphalt mixtures, including those subjected to the short-term oven ageing and others subjected to the long-term oven ageing. Results indicate that polymer-modified asphalt mixtures have superior LTAC performance than that of plain asphalt mixtures. The long-term ageing has more significant effect on the LTAC properties than short-term ageing. The long-term oven ageing test is recommended to evaluate LTAC properties of the aged in-situ asphalt pavement. A performance index for the evaluation of the LTAC properties of the aged asphalt pavements was proposed.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Aging (Materials)
KW  - Asphalt mixtures
KW  - Asphalt pavements
KW  - Cracking
KW  - Low temperature
KW  - Pavement distress
KW  - Pavement maintenance
UR  - https://trid.trb.org/view/902161
ER  - 

TY  - CONF
AN  - 01142238
AU  - Wei, Bingxu
AU  - Zheng, Jianlong
AU  - American Society of Civil Engineers
TI  - Research on Deformation and Instability Characteristic of Expansive Soil Slope in Rainy Season
SN  - 9780784410493
PY  - 2009
SP  - pp 226-236
AB  - The analysis of the deformation and instability characteristic for the cutting slope in expansive soil during a rainy season by FLAC software is presented in this paper. The main conclusions are as follows: if the moisture content is increasing, Poisson ratio decreases with the increase of the depth in atmosphere influence zone, while elastic modulus, internal friction angle and cohesion increase on the contrary. However, the changing zone does not extend the atmosphere influence zone. By the moisture increment, horizontal displacement mainly concentrates on the surface because there is no constraint in horizontal direction on free face of the slope. The soil mass located at the toe of the slope reaches saturation state first, as the rainwater filtering into the slope aggregate, and further, to the toe-slope under gravity load, which on the one hand increase the soil bulk density, on the other hand reduce the soil strength after absorbing water. In addition, the shear stress is concentrated on the toe-slope. So slumps occur at the toe-slope first. When it happens, the support for upper slope decreased and the resistance of lateral swelling become weakened, which will cause sliding upwards again, finally engenders the imbricated surface shape.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Deformation
KW  - Geotechnical engineering
KW  - Moisture content
KW  - Poisson ratio
KW  - Rainfall
KW  - Shear strength
KW  - Slope stability
KW  - Soil densification
KW  - Swelling soils
UR  - https://trid.trb.org/view/902432
ER  - 

TY  - CONF
AN  - 01142236
AU  - Danieau, Jenny
AU  - American Society of Civil Engineers
TI  - Emission Benefits for Alternative Land Use Development (Phase I)
SN  - 9780784410592
PY  - 2009
SP  - pp 51-61
AB  - Single-use, low-density developments create an increased demand for automobiles and roads. Changes in land use influence the location of transportation improvements. Alternative land use projects decrease the amount of pollutants released into the atmosphere, save annual fuel use, and help mitigate traffic congestion. This study was conducted to understand the needs and demands that define these projects in order to accurately quantify emission benefits to be gained from reduced use of road vehicles as a result of alternative land use developments. It was concluded that transit-oriented development projects are more successful at removing single-occupancy vehicle (SOV) from the road, and will therefore be the initial focus. The current methodology used to quantify air quality benefits from alternative land use projects was investigated in order to develop a new methodology that will address alternative transit oriented development projects in the Dallas-Fort Worth 8-hour ozone nonattainment regions for Phase II.
U1  - 2009 Transportation, Land Use, Planning, and Air Quality ConferenceAmerican Society of Civil EngineersFederal Highway AdministrationTransportation Research BoardCenter for Transportation Research and EducationUniversity of North Carolina, CharlotteDenver,Colorado,United States StartDate:20090725 EndDate:20090729 Sponsors:American Society of Civil Engineers, Federal Highway Administration, Transportation Research Board, Center for Transportation Research and Education, University of North Carolina, Charlotte
KW  - Fuel consumption
KW  - Land use planning
KW  - Nonattainment areas
KW  - Pollutants
KW  - Single occupant vehicles
KW  - Traffic congestion
KW  - Transit oriented development
UR  - https://trid.trb.org/view/902074
ER  - 

TY  - CONF
AN  - 01142235
AU  - Fan, Chia-Cheng
AU  - Hsieh, Chih-Chung
AU  - American Society of Civil Engineers
TI  - Design of a Hybrid Reinforced Earth Embankment for Roadways in Mountainous Regions
SN  - 9780784410493
PY  - 2009
SP  - pp 133-142
AB  - This paper presents the mechanical behavior of a hybrid reinforced earth embankment, incorporating reinforced earth embankments with soil nails, built in limited fill space. Soil nails are installed on back of reinforced earth embankments to provide additional resisting forces to stabilize the embankment. This study aims to analyze nail forces developed within a hybrid reinforced earth embankment with various geometric conditions in the fill space. Influence of reinforcement length and slope gradient of the embankment facing on the distribution of nail forces was analyzed and discussed. Simple design charts for determining the nail forces mobilized on back of hybrid reinforced earth embankments in narrow fill space were established in this research.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Backfilling
KW  - Embankments
KW  - Mechanical properties
KW  - Mechanically stabilized earth
KW  - Mountain roads
KW  - Soil nailing
KW  - Soil stabilization
UR  - https://trid.trb.org/view/902365
ER  - 

TY  - CONF
AN  - 01142234
AU  - An, Ji-Hwan
AU  - Nam, Jeong-Hee
AU  - Kwon, Soo Ahn
AU  - Joh, Sung-Ho
AU  - American Society of Civil Engineers
TI  - Estimation of the Compressive Strength of Concrete Using Shear Wave Velocity
SN  - 9780784410486
PY  - 2009
SP  - pp 154-164
AB  - Compressive strength of concrete is a very important parameter in the quality control of both new and existing concrete pavement. It has been widely used to evaluate the concrete strength both in the laboratory and in the construction field regardless of whether numerous mix designs or identical mixtures are used. Errors usually happen in the compressive strength test even if the mixture is evenly mixed and compacted into test specimens. This is caused by either by the hand-operated testing machine or by the eccentricity between the specimen and the testing machine. If concrete specimens with identical mix design need to be tested at various curing ages every time concrete is used in the construction field, the result is significant waste of time, money and efforts are required. Consequently, there is a real need to replace the repeated compressive strength tests with the introduction of nondestructive tests to estimate compressive strength of concrete. In this study, a nondestructive test method using elastic waves was used because shear wave velocity is not affected by restraint conditions. The compressive strength of concrete was estimated according to various curing ages as well. In the results, shear wave velocity was very closely related to the compressive strength. The results further showed that the estimation of compressive strength of concrete using shear wave velocity is very effective and reliable.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Compressive strength
KW  - Concrete pavements
KW  - Mix design
KW  - Pavement performance
KW  - S waves
KW  - Shear strength
KW  - Velocity measurement
UR  - https://trid.trb.org/view/902289
ER  - 

TY  - CONF
AN  - 01142233
AU  - Fan, Qinglai
AU  - Luan, Maotian
AU  - American Society of Civil Engineers
TI  - Elasto-Plastic FEM Analyses of Large-Diameter Cylindrical Structure in Soft Ground Subjected to Wave Cyclic Loading
SN  - 9780784410493
PY  - 2009
SP  - pp 30-35
AB  - The large-diameter cylindrical structures have been increasingly applied recently in coastal and offshore engineering practice in China. This novel type of structure is composed of a steel or reinforced concrete cylindrical thin-wall shell which is embedded partially into the ground by special penetration procedure. The performance of such structures is obviously different from that of the traditional gravity-type foundations. Therefore, in this paper, the elasto-plastic finite element procedure based on effective stress method is developed for the cylindrical structure subjected to cyclic wave loading. To simulate the behavior of soft soil under cyclic loading, an improved dynamic Cam-clay constitutive model proposed by Carter et al (1982) is numerically implemented into the finite element package ABAQUS through implicit integration algorithm. In the analyses, the contact-pairs algorithm in ABAQUS is employed to simulate nonlinear interaction behavior of the contact between the structure and soil. By using the proposed numerical method, the failure mode of cylindrical structure is obtained and distribution of friction stress on the wall outside of cylindrical structure is evaluated.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - China
KW  - Coast and river protective works
KW  - Elastoplasticity
KW  - Finite element method
KW  - Foundations
KW  - Offshore structures
KW  - Repeated loads
KW  - Soft soils
UR  - https://trid.trb.org/view/902369
ER  - 

TY  - CONF
AN  - 01142229
AU  - An, Deok-Soon
AU  - Nam, Jeong-Hee
AU  - Kwon, Soo Ahn
AU  - American Society of Civil Engineers
TI  - Calibration of Roughness Measuring Instrument for Adopting the Performance Warranty System
SN  - 9780784410479
PY  - 2009
SP  - pp 62-67
AB  - Most pavement construction in Korea today is conducted by following prescriptive specifications. The construction must be done according to the standard specifications and the contractor is responsible for any defects where the pavement quality does not meet the minimum requirements written in the specification. Adopting new materials and innovative construction technologies is limited under the current system. Many European countries have adopted the performance warranty systems to improve long-term pavement performance since the 1960’s. In the performance warranty system, a specification defines a certain level of pavement performance as the minimum requirement. Examples of performance indices might include: rutting, roughness, cracking, skid resistance, etc. The prescriptive specification is no longer used in the performance warranty system. Instead, the contractor must satisfy the performance specifications of each index. One of the most important performance indices is the roughness of pavement. The method for evaluating the pavement roughness is essential in order to prevent conflict where there is a disagreement for evaluating results between the contractor and the client. The primary objective of this paper is to present a guideline for the calibration of the roughness measuring instrument of pavement by semi-manual and automatic methods in the performance warranty system.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Pavement performance
KW  - Road construction
KW  - Roughness
KW  - Rutting
KW  - Skid resistance
KW  - South Korea
KW  - Specifications
KW  - Warranty
UR  - https://trid.trb.org/view/902153
ER  - 

TY  - CONF
AN  - 01142228
AU  - Zhao, Jian-san
AU  - Tang, Li-min
AU  - Zhang, Deng-pan
AU  - Tang, Ping-ying
AU  - American Society of Civil Engineers
TI  - Three Integral Constant Determination Methods and Their Applications to Subgrade Settlement Grey Prediction Model
SN  - 9780784410479
PY  - 2009
SP  - pp 74-81
AB  - In this paper, three integral constant determination methods are proposed. First, the first point of modeling data sequence is used. Second, the last point of modeling data sequence is used. Third, the minimum point of fitting error in modeling data sequence is used. According to the above methods, six-step forecasts are respectively made by using six-group subgrade settlement observation data of Shaohuai expressway. The method of selecting integral constant is proposed by comparing and analyzing the predication results. Meanwhile, smoothing test for part of data is made in predication. For the two-group data which are not satisfy smoothness condition, cumulative settlement is used to build subgrade settlement grey prediction model, and the prediction effect was significantly improved.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Grey relational analysis
KW  - Ground settlement
KW  - Integrals
KW  - Models
KW  - Pavement performance
KW  - Performance prediction
KW  - Smoothness
KW  - Subgrade (Pavements)
UR  - https://trid.trb.org/view/902279
ER  - 

TY  - CONF
AN  - 01142227
AU  - Liao, Chi-Chou
AU  - Chen, Bo-Ruei
AU  - Chen, Shun-Hsing
AU  - Huang, Wei-Hsing
AU  - American Society of Civil Engineers
TI  - Temperature Prediction Model for Flexible Pavements in Taiwan
SN  - 9780784410479
PY  - 2009
SP  - pp 82-89
AB  - In this study, a large amount of temperature measurements were obtained from a test site incorporating 3 typical pavement sections to establish a pavement temperature prediction model for freeways in Taiwan. Using thermocouples embedded at 20-mm distance in depth, temperature profiles of 3 different pavement structures were determined for 24-hr periods covering seasonal variations. Predictions made by BELLS model revealed that, at pavement temperature higher than 40°C, the model tends to underestimate pavement temperatures. Considering the climatic characteristics in Taiwan, the air temperature at testing time is used in the model. Also, a single sine function on a 24-hr clock system is used to simplify the predicting equation. The proposed pavement temperature model shows a good correlation between measured and predicted temperatures and has a coefficient of determination greater than 0.93. The pavement temperature prediction model is judged to be easier to use than the BELLS model, due to the fact that temperature data for the previous day are no longer needed, and will be used for temperature adjustment of future falling weight deflectometer data in Taiwan.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Climate
KW  - Falling weight deflectometers
KW  - Flexible pavements
KW  - Pavement performance
KW  - Taiwan
KW  - Temperature
KW  - Thermocouples
UR  - https://trid.trb.org/view/902278
ER  - 

TY  - CONF
AN  - 01142225
AU  - Reese, Carrie A
AU  - Pash-Brimmer, Amanda
AU  - American Society of Civil Engineers
TI  - North Central Texas Pay-as-You-Drive Insurance Pilot Program
SN  - 9780784410592
PY  - 2009
SP  - pp 41-50
AB  - Pay-As-You-Drive (PAYD) Insurance, or mileage-based insurance, has the potential to be an effective transportation pricing strategy with multiple benefits including reductions in vehicle miles traveled, fuel consumption, and vehicle emissions. The North Central Texas Council of Governments (NCTCOG), in partnership with Progressive County Mutual Insurance Company (Progressive), conducted a pilot program to evaluate the feasibility of implementing mileage-based insurance and whether such a program would impact driver behavior. During the first phase of the study, a statistical analysis of available data produced a positive correlation between mileage driven and accident frequency, thus validating the hypothesis that insurance companies can provide financial incentives to customers who drive fewer miles because of an associated reduction in claim costs. A second phase of the pilot program offered financial incentives to volunteer participants who were able to reduce their mileage from a personal baseline condition. Data collected from the participants’ vehicle on-board diagnostic system resulted in an average mileage reduction of five percent. Additional spatial analysis concluded that mileage reduction was independent of participant residence suggesting PAYD insurance would be a viable strategy to minimize negative environmental impacts region-wide.
U1  - 2009 Transportation, Land Use, Planning, and Air Quality ConferenceAmerican Society of Civil EngineersFederal Highway AdministrationTransportation Research BoardCenter for Transportation Research and EducationUniversity of North Carolina, CharlotteDenver,Colorado,United States StartDate:20090725 EndDate:20090729 Sponsors:American Society of Civil Engineers, Federal Highway Administration, Transportation Research Board, Center for Transportation Research and Education, University of North Carolina, Charlotte
KW  - Environmental impacts
KW  - Fuel consumption
KW  - Insurance rates
KW  - Mileage-based user fees
KW  - North Central Texas Council of Governments
KW  - Pay as you drive
KW  - Pollutants
KW  - Road pricing
KW  - Texas
KW  - Vehicle miles of travel
UR  - https://trid.trb.org/view/902073
ER  - 

TY  - CONF
AN  - 01142222
AU  - Chiang, Ziping
AU  - Chen, Chine-Ta
AU  - Sung, Po-Hsun
AU  - Lin, Jyh-Dong
AU  - American Society of Civil Engineers
TI  - Weights Comparison of Pavement Surface Distress Indexes in China and the US
SN  - 9780784410479
PY  - 2009
SP  - pp 32-38
AB  - Different pavement surface distress indexes have been developed in different regions in order to meet different engineering demands. Thus, a special pavement distress index can show the unique characteristics of a specific region. In this paper, we analyze and compare the weights of distress types for the PCI (Pavement Condition Index), the PCR (Pavement Condition Rating), and for the pavement condition index that was developed in Mainland China (PCI_MC). In order to estimate the weights of the PCI distress types, the integral method is used to calculate the area using a deduct value curve. Based on a normalization method, we set the M level of Alligator Cracking as a basic unit and show the distress type sequence for the PCI, PCR, and the PCI_MC. The descriptive statistics indicating the severity of the distress types for the three indexes are shown. Engineers who want to develop a new pavement distress index specific to the special demands of a particular region should consult the differences among these three indexes.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Alligator cracking
KW  - China
KW  - Condition indexes
KW  - Condition surveys
KW  - Pavement cracking
KW  - Pavement design
KW  - Pavement distress
KW  - Pavement performance
KW  - United States
UR  - https://trid.trb.org/view/902281
ER  - 

TY  - CONF
AN  - 01142221
AU  - Fu, Hongyuan
AU  - Zhang, Yang
AU  - Kuang, Bo
AU  - American Society of Civil Engineers
TI  - Stress Analysis of Portland Cement Concrete Pavement Slab under Various Supporting Conditions
SN  - 9780784410486
PY  - 2009
SP  - pp 85-92
AB  - Rigid concrete pavement slab under various supporting conditions was analyzed by elasto-plastic nonlinear three-dimensional finite element technique. The influences of void size on the stress, and deflection of concrete pavement slabs were investigated and are presented in this study. This research shows that the stress peak value of a loaded slab is approximately two times higher than at the across corner slab. Due to stress concentration, the void area boundary of PCC slabs becomes a fracture boundary, because it eventually ends up as a corner crack. The deflections of loaded slabs grow rapidly when the tire load approaches the center of the slab. As expected, the highest deflection occurred at the location directly below where the tire load was applied. In addition, the deflections increase directly with increases in the void size. ASCE Subject Headings:
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Air voids
KW  - Concrete
KW  - Concrete pavements
KW  - Finite element method
KW  - Portland cement concrete
KW  - Slabs
KW  - Structural analysis
UR  - https://trid.trb.org/view/902346
ER  - 

TY  - CONF
AN  - 01142218
AU  - Qin, Renjie
AU  - Li, Yuzhi
AU  - Li, Zhenke
AU  - American Society of Civil Engineers
TI  - Analyzing the Cause of Asphalt Pavement Rut Damage of Heng-Zao Freeway
SN  - 9780784410479
PY  - 2009
SP  - pp 47-54
AB  - Asphalt mixture is a viscous-elastic-plastic material, its performance changes with the conditions of the environment temperature and traffic loading. Although lots of measures have been taken from design to construction to control asphalt pavement early damages, such as selecting raw material and asphalt cementation material, mixture gradation, mixture mechanics capability, construction technology, and testing standards. But most freeways in China have still suffered early damages. In south regions, rut and water damages are the main problem because of the rainy climate and high environment temperature. According to the investigations of the existing traffic of Heng-Zao freeway in Hunan province and the axle-load condition, rut depth, on-site core samples, extracting test, thickness, field sampling and indoor rut test, the paper firstly analyzes the present condition, evaluates the pavement performance and construction technology, then analyzes the gradation type, finally summarizes all the possible causes of serious rut of the freeway. These can provide the references for the pavement design and construction in south regions.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt mixtures
KW  - Asphalt pavements
KW  - China
KW  - Condition surveys
KW  - Cores (Specimens)
KW  - Pavement distress
KW  - Pavement performance
KW  - Ruts (Pavements)
KW  - Thickness
KW  - Traffic loads
UR  - https://trid.trb.org/view/902150
ER  - 

TY  - CONF
AN  - 01142216
AU  - Qin, Zhibin
AU  - Zha, Xudong
AU  - American Society of Civil Engineers
TI  - Study of Deep Drain Stability in High Steep Slope
SN  - 9780784410493
PY  - 2009
SP  - pp 208-213
AB  - The seepage situation of cutting slope groundwater is simulated and analyzed with the finite element software ANSYS. Comparing and analyzing the seepage field distribution of setup plan for hole diameter, hole long, hole distance to different drainage holes, it gets that the incidence and effect for changes of hole diameter, long hole, hole distance to drainage seepage field distribution. Combined with the real project, it discusses the distribution of slope seepage field under drainage holes laying double row along elevation, and draws that drainage holes laying multi-row along elevation can significantly improve drainage effect. So it determines the design project for drainage curtain of water-rich and high-steep cutting slope. Then, through the geological prospecting and the hydrological conditions survey in the real engineering, combined with the results of drainage pipes with finite element analysis, the specific buried project of deep drainage pipes is identified. Moreover, according characteristics of deep drainage, the technology and the control requirements of corresponding construction are established. Finally, slope surface deformation and internal displacement are monitored by using GPS and inclinometer. Monitoring results for many times in 18 months are analyzed. The largest surface deformation is 41.4 mm, and the largest internal deformation is only 10 mm, all are less than the first order of allowing deformation 123.75 mm of 0.0025h (h is the height of slope). Slope stability is got, and it is further validated the slope has a good stability after the deep drainage treating.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Drainage
KW  - Embankments
KW  - Finite element method
KW  - Geotechnical engineering
KW  - Global Positioning System
KW  - Inclinometers
KW  - Seepage
KW  - Slope stability
KW  - Subgrade materials
UR  - https://trid.trb.org/view/902438
ER  - 

TY  - CONF
AN  - 01142215
AU  - Braxil, H M
AU  - Purvis, Charles L
AU  - American Society of Civil Engineers
TI  - BASSTEEG (Bay Area Simplified Simulation of Travel, Energy and Greenhouse Gases: Sketch Planning Charrette/GIS Models for Predicting Household Vehicle Miles of Travel (VMT) and Greenhouse Gas Emissions
SN  - 9780784410592
PY  - 2009
SP  - pp 110-122
AB  - With the increased interest in the interactions of land use and transportation and their related impacts on global warming, there is now a warranted need for improved and quicker techniques for stimulating mobile source based, regional and sub-regional greenhouse gas emissions. The Bay Area Simplified Simulation of Travel, Energy, and Greenhouse Gases (BASTEGG) is a GIS-based tool for calculating automobile availability, vehicle usage, fuel consumption, and greenhouse gas emissions, by each household within the San Francisco Bay Area at the neighborhood level. There are three component models in the BASSTEGG, simulating auto ownership levels, vehicle usage levels, and carbon dioxide emissions. Socio-economic and elative transit-to-highway accessibility data at the travel analysis zone level is used to predict the distribution of household by vehicle availability level. Cross-classification models of vehicle miles of travel per household (VMT/HH) are applied based on urban density levels. Lastly, emissions per mile models, based on California Air Resources Board’s EMFAC models for various forecast years, are used to convert VMT per household into on-road mobile sources greenhouse gas emissions per household. The BASSTEGG model is intended to be used in land use alternatives scenarios testing at the regional level, and by city planners interested in the VMT and greenhouse gases produced and their communities.
U1  - 2009 Transportation, Land Use, Planning, and Air Quality ConferenceAmerican Society of Civil EngineersFederal Highway AdministrationTransportation Research BoardCenter for Transportation Research and EducationUniversity of North Carolina, CharlotteDenver,Colorado,United States StartDate:20090725 EndDate:20090729 Sponsors:American Society of Civil Engineers, Federal Highway Administration, Transportation Research Board, Center for Transportation Research and Education, University of North Carolina, Charlotte
KW  - Carbon dioxide
KW  - Environmental impacts
KW  - Exhaust gases
KW  - Fuel consumption
KW  - Geographic information systems
KW  - Greenhouse gases
KW  - Pollutants
KW  - San Francisco Bay Area
KW  - Sketch planning
KW  - Vehicle miles of travel
UR  - https://trid.trb.org/view/902080
ER  - 

TY  - CONF
AN  - 01142211
AU  - Li, Jiusu
AU  - American Society of Civil Engineers
TI  - Mix Design of Pervious Recycled Concrete
SN  - 9780784410479
PY  - 2009
SP  - pp 103-108
AB  - Rules and parameters of mix design for pervious recycled concrete were proposed. Making use of proportioning mix method for stone matrix asphalt (SMA) and open graded friction course (OGFC), volume indexes including volume of voids(VV), volume of cement paste (VP) as well as percent air voids in coarse aggregate(VCA) can be seen as key parameters guiding for mix design. Mix design procedures for pervious recycled concrete were then put forward. Both compressive strength and water seepage velocity were put forward as verification indexes. A practical mix design example was given and the compressive strength and VV test result show that the new mixing design method for no-fines pervious recycled concrete or conventional pervious concrete is practical and feasible.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Air voids
KW  - Coarse aggregates
KW  - Concrete pavements
KW  - Friction course
KW  - Mix design
KW  - Open graded aggregates
KW  - Recycled materials
KW  - Stone matrix asphalt
UR  - https://trid.trb.org/view/902168
ER  - 

TY  - CONF
AN  - 01142210
AU  - He, Zhaoyi
AU  - Lu, Zhao-feng
AU  - Chen, Hongxing
AU  - American Society of Civil Engineers
TI  - Study on the Method to Calculate Rutting of Asphalt Pavement Based on the Dynamic Load Coupled between the Road and Vehicle
SN  - 9780784410479
PY  - 2009
SP  - pp 55-61
AB  - By measuring the roughness of high-grade asphalt pavement, the time domain model of roughness based on international roughness index (IRI) was established by Inverse Discrete Fourier Transform(IDFT), which realizes the simulation of road roughness. The multiple-degree-of-freedom (MDOF) vehicle model was founded making use of the Dynamic Simulation software ADAMS. And with the time domain model, dynamic load spectrums for different grade pavements and different speeds were obtained by calculating dynamic load. Based on mathematical statistical analysis for load spectrums at different speeds and the influence of vehicle’s actual loading condition and intermissive time, dynamic load models for different grade pavements were obtained. Combined finite element technology and the visco-elastic-plastic theory of asphalt mixture with the software ANSYS, the two-dimensional finite model of pavement structure was established. Considering the material characteristic of nonlinear, the method of calculating asphalt pavement rutting was put forward. The error is less than 10% between theoretical value and practical measurement rutting data of Handan-Changzhi highway. The result indicates that the method of rutting prediction, which based on the time domain model of roughness and the dynamic load coupled between pavement and vehicle is reasonable and reliable.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt pavements
KW  - Concrete pavements
KW  - Degrees of freedom
KW  - Discrete Fourier transforms
KW  - Dynamic loads
KW  - International Roughness Index
KW  - Pavement performance
KW  - Roughness
KW  - Ruts (Pavements)
KW  - Statistical analysis
UR  - https://trid.trb.org/view/902277
ER  - 

TY  - CONF
AN  - 01142209
AU  - Wei, Li-Min
AU  - He, Qun
AU  - Rao, Bo
AU  - American Society of Civil Engineers
TI  - Dual-Control Method to Determine the Allowable Filling Height of Embankment on Soft Soil Ground
SN  - 9780784410493
PY  - 2009
SP  - pp 237-242
AB  - In order to plan rationally the construction process of embankment on the soft soil ground, the information construction technology to determine the allowable filling height of embankment was proposed, which is based on slope stability and allowable settlement after construction. The correlative program had been developed. The method of effective consolidation stress was adopted to analyze the stability of the embankment and the enhancement of the sheer strength of the soft ground with its consolidation process was taken into account. Method that modifies the degree of consolidation using the monitored settlement was proposed too. All these were performed to the practical case and the results show that the dual-control method proposed is effective and practicable to guild the information-construction of embankment on soft soil ground.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - China
KW  - Construction
KW  - Embankments
KW  - Fills
KW  - Geotechnical engineering
KW  - Ground settlement
KW  - Slope stability
KW  - Soft soils
UR  - https://trid.trb.org/view/902366
ER  - 

TY  - CONF
AN  - 01142208
AU  - American Society of Civil Engineers
TI  - New Technologies in Construction and Rehabilitation of Portland Cement Concrete Pavement and Bridge Deck Pavement: Selected Papers from the 2009 GeoHunan International Conference
SN  - 9780784410486
PY  - 2009
SP  - 175p
AB  - This Geotechnical Special Publication contains 21 papers that were presented at the GeoHunan International Conference, Challenges and Recent Advances in Pavement Technologies and Transportation Geotechnics, held in Changsha, Hunan, China, from August 3 to 6, 2009. This Geotechnical Special Publication contains 21 peer-reviewed technical papers presented at the GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation Geotechnics, which took place in Changsha, Hunan, China, from August 3 to 6, 2009.  This proceedings is divided into two sections, Innovative Techniques for Bridge Deck Pavement Design and Construction and New Analysis Techniques and Materials for Portland Cement Concrete Pavement System. Hunan, one of the largest commercial provinces in China, is rapidly developing into a modern epicenter of international finance and trade. Recent construction in many parts of China has provided geotechnical and pavement engineers with great opportunities for creating cutting-edge solutions to problems involving highway and bridge pavements. This publication will be valuable to geotechnical engineers and professionals, as well as construction professionals.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bridge decks
KW  - Geotechnical engineering
KW  - Pavement design
KW  - Paving
KW  - Portland cement concrete
KW  - Rehabilitation (Maintenance)
KW  - Road construction
KW  - Technological innovations
UR  - https://trid.trb.org/view/902135
ER  - 

TY  - CONF
AN  - 01142207
AU  - Li, Ren-Ping
AU  - American Society of Civil Engineers
TI  - Stability Analysis of Cutting Slope Reinforced with Anti-Slide Piles by FEM
SN  - 9780784410493
PY  - 2009
SP  - pp 166-173
AB  - Stability of cutting slopes reinforced by anti-slide piles is analyzed with finite element method (FEM) under the hypothesis of plane strain in this paper. The soil is idealized to be elastoplastic, obeying Mohr-Coulomb yield criterion. Equivalent sheet-pile is adopted in which the plastic bending failure will occur as soon as it reaches the ultimate allowable moment (UAM). The safety factor of the pile-reinforced slope is calculated through strength reduction method. The effects of types of piles, flexural rigidity (FR), UAM and location of piles-row on safety factor are discussed in this paper.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Cutting (Earthwork)
KW  - Embankments
KW  - Finite element method
KW  - Geotechnical engineering
KW  - Mechanically stabilized earth
KW  - Piles (Supports)
KW  - Slope stability
UR  - https://trid.trb.org/view/902437
ER  - 

TY  - CONF
AN  - 01142205
AU  - Tsai, Pei-Hsun
AU  - Hsu, Sung-Chi
AU  - Lai, Jiunnren
AU  - American Society of Civil Engineers
TI  - Effects of Core on Dynamic Responses of Earth Dam
SN  - 9780784410493
PY  - 2009
SP  - pp 8-`3
AB  - This paper investigates the dynamic response of the Pao-Shan II Dam subjected to the Chi-Chi earthquake (ML=7.3) in Taiwan by using FLAC3D. The elastic modulus of the dam is considered to vary with mean stress in this study. Staged construction, seepage, static equilibrium and dynamic response are sequentially analyzed. Fourier power spectra are analyzed as the earth dams subjected to a sweep frequency dynamic loading. Influences of core dimensions on the dynamic responses of the earth dam are investigated. The influence of the core width-height ratio and length-height ratio of the dam on the first natural frequency is studied in this study. The results show that 3D effect could be neglected for η > 4 cases. The first natural frequency decreases with the increase of core width-height ratio or length-height ratio of an earth dam. The first natural frequency increases slightly after the seepage phase. The stiffness of the dam decreases at the end of an earthquake which causes the first natural frequency to decrease.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Chi-Chi Earthquake (Taiwan)
KW  - Dynamic loads
KW  - Dynamic response
KW  - Earth dams
KW  - Earthquake resistant design
KW  - Fourier analysis
KW  - Modulus of elasticity
UR  - https://trid.trb.org/view/902367
ER  - 

TY  - CONF
AN  - 01142204
AU  - Raman, Ramesh
AU  - American Society of Civil Engineers
TI  - Successful Strategies for Diesel Emission Specification Implementation
SN  - 9780784410592
PY  - 2009
SP  - pp 123-130
AB  - There have been several studies that have been conducted on the health implications of diesel engine emission. They have concluded that the emission from diesel engines is a health hazard. The Environmental Protection Agency (EPA) has set standards for diesel exhaust emission, but they apply only to new engines. Effective from 2011, all new non-road diesel engines will have to meet the EPA’s stringent Tier e standards for exhaust emission. However, there are no regulations that mandate existing machine models to be upgraded tier 4 emission level standards. As a result, only when the emission control specifications are included in construction contracts it is possible to achieve a tier 4 level of emission control. This paper shows how the specification development and implementation process is utilized to build a team of committed advocates who can work with the contractors during bidding to ensure availability of compliant equipment from the start of the project. There are challenges associated with implementing the specification on leased equipment; these are also explained. The author has, for several years from the inception of diesel exhaust emission mitigation in 2003, spearheaded introduction and adoption of aggressive particulate matter (PM) reduction technologies on construction equipment in Manhattan and created a heightened awareness of clean diesel and its health benefits.
U1  - 2009 Transportation, Land Use, Planning, and Air Quality ConferenceAmerican Society of Civil EngineersFederal Highway AdministrationTransportation Research BoardCenter for Transportation Research and EducationUniversity of North Carolina, CharlotteDenver,Colorado,United States StartDate:20090725 EndDate:20090729 Sponsors:American Society of Civil Engineers, Federal Highway Administration, Transportation Research Board, Center for Transportation Research and Education, University of North Carolina, Charlotte
KW  - Diesel engine exhaust gases
KW  - Diesel engines
KW  - Emissions reduction
KW  - Environmental impacts
KW  - Exhaust gases
KW  - Pollutants
KW  - Specifications
KW  - Technological innovations
KW  - U.S. Environmental Protection Agency
UR  - https://trid.trb.org/view/902081
ER  - 

TY  - CONF
AN  - 01142203
AU  - Ali, Sarfraz
AU  - Ali, Liaqat
AU  - American Society of Civil Engineers
TI  - Remediation of Liquefaction Potential Using Deep Dynamic Compaction Technique
SN  - 9780784410493
PY  - 2009
SP  - pp 42-47
AB  - Deep Dynamic Compaction technique was used to remediate liquefaction potential and enhance soil bearing capacity in one of the construction projects in Pakistan. The soil appeared to be susceptible to liquefaction as cracks of varying sizes were observed in existing structures in the project area during October 8, 2005 earthquake. Among various soil improvement alternatives, deep dynamic compaction technique was used due to its economy. Post compaction liquefaction evaluation indicated remediation of the liquefaction. Study of the project enhanced our understanding of deep compaction behavior of alluvial deposits consisting of alternating layers of fine and coarse grained soils. The paper gives an account of liquefaction evaluation, dynamic compaction program and effectiveness of dynamic compaction program.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bearing capacity
KW  - Earthquake resistant structures
KW  - Geotechnical engineering
KW  - Liquefaction
KW  - Pakistan
KW  - Soil compaction
KW  - Soil remediation
KW  - Soil stabilization
UR  - https://trid.trb.org/view/902431
ER  - 

TY  - CONF
AN  - 01142202
AU  - Lei, Jinshan
AU  - Yang, Junsheng
AU  - Zhou, Dadong
AU  - Wang, Zhiai
AU  - American Society of Civil Engineers
TI  - Mechanism Analysis and Treatment of Landslide of Changtan New River
SN  - 9780784410493
PY  - 2009
SP  - pp 214-219
AB  - Due to the continual rainfall and creep deformation occurring to the slope on left bank of the new river in the flood control projects in Liye west of Hunan, and a serious landslide was likely to occur to the slope. Based on the analysis of the mechanism of landslide and slope stability, and the stratum layer parameter inversion carried by the Least Square method, the authors finally decided to use prestressed cable and anchor for the treatment to the slope. The monitoring result indicated that this treatment plan is reliable and safe.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Creep properties
KW  - Floods
KW  - Hunan (China)
KW  - Landslides
KW  - Least squares method
KW  - Rainfall
KW  - Rivers
KW  - Slope stability
UR  - https://trid.trb.org/view/902378
ER  - 

TY  - CONF
AN  - 01142201
AU  - Li, Le
AU  - Cen, Guo-ping
AU  - American Society of Civil Engineers
TI  - The Reliability Calculation Program and the Parameter Sensitivity Analysis of Airfield Cement Concrete Pavement
SN  - 9780784410486
PY  - 2009
SP  - pp 93-100
AB  - The fatigue destructive model which considers the temperature fatigue stress in airfield cement concrete pavement was introduced. The distribution rules for four main parameters were developed by measurement and analysis. The Reliability Calculation Program for Airfield Cement Pavement (RCPACP) was compiled based on Monte Carlo Method. The ranges of variability coefficients of parameters were described and the sensitivity of the parameters was qualitatively and quantitatively analyzed based on the program. The results show that the sensitivity of flexural flexibility modulus of concrete is largest and the flexibility modulus on top of the base is smallest.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Airport runways
KW  - Concrete pavements
KW  - Fatigue strength
KW  - Flexural strength
KW  - Monte Carlo method
KW  - Sensitivity analysis
UR  - https://trid.trb.org/view/902339
ER  - 

TY  - CONF
AN  - 01142200
AU  - Turner, Colleen Reitz
AU  - Frazier, J A
AU  - Kaiser, Robert G
AU  - American Society of Civil Engineers
TI  - How Will State Transportation Agencies Handle the Issue of Climate Change: A Case Study from the State of Maryland
SN  - 9780784410592
PY  - 2009
SP  - pp 86-94
AB  - Climate change is caused by the accumulation of greenhouse gases (GHG), primarily carbon dioxide, methane, nitrous oxides, and fluorinated gases, in the Earth’s atmosphere. While some GHG occurs naturally, there is now very strong evidence that anthropogenic emissions, emitted mainly through the combustion of fossil fuels, are the primary reason for the increase in global temperatures. Recognizing the harmful consequences of leaving GHG emissions unchecked, many state have begun to investigate options for reducing their GHG emissions and addressing the anticipated impacts of climate change. Approximately 38 states have developed or are in the process of developing climate action plans. This paper focuses specifically on the State of Maryland and outlines the State’s current course of action and the role of the Maryland Department of Transportation (MDOT) has played up until this point and how the role may evolve given the challenges ahead.
U1  - 2009 Transportation, Land Use, Planning, and Air Quality ConferenceAmerican Society of Civil EngineersFederal Highway AdministrationTransportation Research BoardCenter for Transportation Research and EducationUniversity of North Carolina, CharlotteDenver,Colorado,United States StartDate:20090725 EndDate:20090729 Sponsors:American Society of Civil Engineers, Federal Highway Administration, Transportation Research Board, Center for Transportation Research and Education, University of North Carolina, Charlotte
KW  - Carbon dioxide
KW  - Case studies
KW  - Climate change
KW  - Environmental impacts
KW  - Fossil fuels
KW  - Greenhouse gases
KW  - Maryland
KW  - State departments of transportation
UR  - https://trid.trb.org/view/902077
ER  - 

TY  - CONF
AN  - 01142199
AU  - Kim, Seong-Min
AU  - Rhee, Suk-Keun
AU  - Park, Hee Beom
AU  - Yun, Dong Ju
AU  - American Society of Civil Engineers
TI  - Correlations among Pavement Surface Roughness, Moving Dynamic Vehicle Loads, and Concrete Pavement Performance
SN  - 9780784410479
PY  - 2009
SP  - pp 25-31
AB  - The dynamic loads imposed by moving vehicles have variations in load magnitude due to the surface roughness of the pavement system and larger dynamic loads than the design loads can affect the pavement performance and life. The purpose of this study was to find the relationships among the pavement surface roughness, variations in moving dynamic vehicle loads, and the performance of the concrete pavement system. The artificial pavement profiles of triangular amplitude variation were developed first to use in the analysis to find the effects of the wavelength and amplitude of the surface roughness on the moving dynamic vehicle loads. The analysis was performed and the relationships between the surface roughness elements and the load magnitude, the load frequency, and the phase between the front- and rear-axle loads, of the moving tandem-axle loads were found. To obtain the pavement responses to moving arbitrary vehicle loads, formulations were developed in the transformed field domain using a triple Fourier transform in time, space, and moving space. Based on the analysis results of this study, the correlations among the surface roughness, dynamic vehicle loads, and the pavement performance could be obtained.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Concrete pavements
KW  - Live loads
KW  - Pavement performance
KW  - Roughness
KW  - Traffic loads
KW  - Vehicles
UR  - https://trid.trb.org/view/902156
ER  - 

TY  - CONF
AN  - 01142198
AU  - Zhang, Lei
AU  - Huang, Wei
AU  - Qian, Zhendong
AU  - American Society of Civil Engineers
TI  - Optimization Design of Long-Span Steel Bridge Deck Pavement System
SN  - 9780784410486
PY  - 2009
SP  - pp 9-18
AB  - Asphalt mixtures have been widely used for wearing surfaces on steel decks of long-span bridges. Due to the unique mechanical and environmental conditions of steel decks, requirements for paving materials and paving patterns are different from those for regular road pavements. Currently there are no commonly adopted design theories or procedures for steel bridge deck surfacing. Premature failures of deck pavements have often been observed on steel bridges, particularly on the newly-built long-span bridges in China. Therefore, two main objectives are identified in this paper as: 1) integrating the separate design processes for the bridge structure and the deck pavement into one interactive process; 2), establishing the methodology of determining pavement system parameters. Systematic research has been conducted to develop the design theory and procedure, from many aspects including pavement materials and structure, mechanistic characteristics of the wearing surfaces on steel decks, fatigue properties, axle-load equivalency conversion, and optimization design procedure. The empirical-mechanistic approach is employed for the optimization of design. The case study shows that it is more feasible to consider the orthotropic deck and its pavement as a whole structural system during bridge design.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt mixtures
KW  - Axle loads
KW  - Bridge decks
KW  - Long span bridges
KW  - Pavement performance
KW  - Steel structures
KW  - Wearing course (Pavements)
UR  - https://trid.trb.org/view/902330
ER  - 

TY  - CONF
AN  - 01142197
AU  - Wu, C Y
AU  - Li, Y
AU  - American Society of Civil Engineers
TI  - Mechanical Study of Steel Bridge Pavement with Composite Asphalt Materials
SN  - 9780784410479
PY  - 2009
SP  - pp 151-157
AB  - The mechanical analysis is applied for the steel box girder bridge with orthotropic plate and pavement by means of Finite Element Method. The interaction between steel bridge and pavement is evaluated by the three stages in calculation. The analysis is focused on the mechanical features and the influential factors of the large components (cross diaphragm) and the local components (U-shaped ribs). Considering the mechanical effects by the heavy-duty vehicle load and heavy-load with braking, the interfacial shear failure is studied as one of the main reasons of damages. Moreover, in view of this major form of damage, this paper provides the corresponding mechanical analysis of the indicators.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt pavements
KW  - Box girder bridges
KW  - Finite element method
KW  - Highway bridges
KW  - Live loads
KW  - Mechanical analysis
KW  - Steel bridges
KW  - Traffic loads
UR  - https://trid.trb.org/view/902167
ER  - 

TY  - CONF
AN  - 01142196
AU  - Li, Ming
AU  - Lan, Chao
AU  - Mu, Hai-rui
AU  - Song, Jun-min
AU  - American Society of Civil Engineers
TI  - Review of the Back-Propagation Neural Network Method as a Basis for Pavement Performance Assessment
SN  - 9780784410479
PY  - 2009
SP  - pp 1-8
AB  - The conventional methods of pavement performance assessment indices were established by statistical analyses based on single item and multiple linear regression techniques. These regression models have many deficiencies and are not able to truly reflect the inherent complex nonlinear relationships among the performance indices. However, the Back-Propagation (BP) neural network method with ca comprehensive nonlinear dynamic system is able to address some of these weaknesses. In this paper, the International Roughness Index (IRI), Damage Rate (DR), Structure Strength Index (SSI), Sideway Force Coefficient (SFC), and Rutting Depth (RD) were selected as the five index variables. These variables are considered as some of the most significant factors that affect pavement performance. Additionally, these indices were easily classified as non-dimensional quantities and became input data units in the application of the BP neural network. In the study, Pavement Management Index (PMI) was accordingly sub-divided into five groups representing five grades; namely (1) excellent, (2) good, (3) medium, (4) subordinated, and (5) inferior. In this paper, pavement performance assessment based on the BP neural network method and PMI is presented along with a practical application example; followed by a summary of findings and recommendations.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt pavements
KW  - Backpropagation
KW  - Condition surveys
KW  - International Roughness Index
KW  - Neural networks
KW  - Pavement management systems
KW  - Pavement performance
KW  - Roughness
KW  - Ruts (Pavements)
UR  - https://trid.trb.org/view/902273
ER  - 

TY  - CONF
AN  - 01142194
AU  - Sun, Ji-Shu
AU  - Dou, Yuan-Ming
AU  - Yang, Chun-Feng
AU  - Sun, Jian-Cheng
AU  - American Society of Civil Engineers
TI  - Study on the Application Performances of Saponated Residue and Fly Ash Mixture as Geogrids Reinforced Earth Retaining Wall Filling Material
SN  - 9780784410493
PY  - 2009
SP  - pp 197-201
AB  - The filling material performances and its interface friction properties with the geogrids would directly influence the application properties of the geogrids reinforced earth retaining walls. Through systematical experiments, the technical performances which include strength and rigidity of saponated residue and fly ash mixture were studied in this paper. Moreover, the interface friction properties between geogrids and the mixture were studied. The results indicate that the mixture of saponated residue and fly ash have higher strength and rigidity, good interface friction with the geogrids. The technical performances of the mixture conform to the requirements of geogrids reinforced earth retaining walls, so it can be used as the filling material of geogrids reinforced earth retaining walls.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Coefficient of friction
KW  - Embankments and retaining walls
KW  - Fillers (Materials)
KW  - Fly ash
KW  - Geogrids
KW  - Geotechnical engineering
KW  - Mechanically stabilized earth
KW  - Waste products
UR  - https://trid.trb.org/view/902440
ER  - 

TY  - CONF
AN  - 01142193
AU  - Zhao, L H
AU  - Luo, Q
AU  - Li, L
AU  - Yang, F
AU  - Yang, X L
AU  - American Society of Civil Engineers
TI  - The Upper Bound Calculation of Passive Earth Pressure Based on Shear Strength Theory of Unsaturated Soil
SN  - 9780784410493
PY  - 2009
SP  - pp 151-157
AB  - Based on the shear strength of unsaturated soil, the passive earth pressure of unsaturated soils is studied by means of the kinematical approach of limit analysis theory, in which not only the saturated shear strength parameters φ’, c’ and (ua-uw), but also the soil-water characteristic curve and the engineering practice are analyzed synthetically. The result of upper bound method for passive earth pressure is obtained via the sequential quadratic programming. The numerical results show that the existing of soil suction and the distribution mode of soil suction exert a significant effect on the passive earth pressure. Meanwhile, if the yield criterion of unsaturated soils turns into the yield criterion of saturated soils, then the solutions presented here ameliorate appreciably with available predictions.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Earth pressure
KW  - Geotechnical engineering
KW  - Shear strength
KW  - Soil water
KW  - Soils by moisture content or potential
KW  - Unsaturated soils
UR  - https://trid.trb.org/view/902442
ER  - 

TY  - CONF
AN  - 01142192
AU  - Zeng, Sheng
AU  - Xu, Jia
AU  - Zeng, Xiaojun
AU  - American Society of Civil Engineers
TI  - Analysis on Criterion for Void Identifying under Cement Concrete Pavement Corner
SN  - 9780784410486
PY  - 2009
SP  - pp 125-132
AB  - Based on deflections from theoretical analysis and falling weight deflectometer (FWD) at the slab center and corner, a method was established for the estimation of void size at the slab corner. Also, by modifying joint load-transfer capacity based on the theoretical slab corner deflection in infinite site slab under even supporting conditions, the theoretical slab corner deflection was calculated, and compared with FWD testing data to estimate the void conditions beneath the slab corner. A concept of void index was developed, which is defined as the ratio of deflections of testing in slab corner under FWD load against theoretical deflections. Through analyzing the relations between void index and other factors such as void size, slab modulus, slab thickness and foundation reaction modulus, the regression formula between void index and void size was established for the estimation of void size. The results of void identification using the method proposed in this study with the data from the test section at the Hunan Leiyi Expressway compare reasonably well with the actual condition, which proves the reasonableness and viability of the method proposed in this study.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Air voids
KW  - Asphalt concrete pavements
KW  - Deflection
KW  - Falling weight deflectometers
KW  - Load transfer
KW  - Pavement design
KW  - Theory
KW  - Thickness
UR  - https://trid.trb.org/view/902283
ER  - 

TY  - CONF
AN  - 01142191
AU  - Choi, Seongcheol
AU  - Won, Moon C
AU  - American Society of Civil Engineers
TI  - Performance of Continuously Reinforced Concrete Pavement Containing Recycled Concrete Aggregate
SN  - 9780784410486
PY  - 2009
SP  - pp 165-172
AB  - This paper presents the performance of continuously reinforced concrete pavement (CRCP) constructed in 1995 that utilized recycled concrete aggregate (RCA) as both coarse and fine aggregates. The project is Houston on a section of IH-10 between Loop 610 W and IH-45. In this project, no virgin aggregates were used. Concerns were raised regarding the performance of CRCP containing RCA. Detailed study was conducted to evaluate concrete material properties containing RCA. The properties of recycled aggregate measured in this study compared with virgin aggregate are consistent with those reported elsewhere: low specific gravity, higher water absorption, sulfate soundness loss, LA abrasion loss, and thermal coefficient. Little variation was observed in the paving operation due to the use of 100 % recycled coarse and fine aggregates. The moisture control of recycled aggregate, especially fine aggregate, is critical in producing consistent and workable concrete. The short-term and long-term performance of the reconstructed CRCP has been excellent, with tight crack widths and little spalling. Between concrete with virgin aggregates and concrete with recycled aggregates, there is no significant difference in thermal coefficient and permeability; however, there are significant differences in modulus of elasticity, compressive and indirect tensile strength, and water absorption. The low modulus of RCA concrete and good bond between recycled coarse aggregates and new mortar appear to be the key ingredients for good pavement performance. After more than 10 years of service under heavy traffic, the CRCP section containing 100% RCA is still providing excellent performance with no single structural distress.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Aggregates
KW  - Compressive strength
KW  - Concrete pavements
KW  - Continuously reinforced concrete pavements
KW  - Permeability
KW  - Recycled materials
KW  - Reinforced concrete
KW  - Tensile strength
UR  - https://trid.trb.org/view/902335
ER  - 

TY  - CONF
AN  - 01142190
AU  - Wei, Jian-guo
AU  - Zheng, Jian-Long
AU  - American Society of Civil Engineers
TI  - Influence of ATB on Pavement Performance
SN  - 9780784410479
PY  - 2009
SP  - pp 129-135
AB  - In order to study the influence of asphalt treated base (ATB) on pavement performance, a multi-layer elastic theory program is utilized to calculate the stress and strain in different pavement structures. Based on an instant heat conducting hypothesis, a finite element model is established to calculate the temperature stress and the strain of pavement structure when temperature reduces. Then the stress and strain of all the structural layers are calculated considering the corporate effect of loading and temperature. It is found that the stress caused by quickly-lowered temperate is far more lager than that caused by load. Thus it is revealed that the cracking in pavement is mainly caused by the temperature. Through contrast it is proved that the stress and strain caused by load and temperature of pavement with ATB30 are less than those of semi-rigid pavement. So ATB is proved to be an efficient way to decrease crack in asphalt pavement based on above calculation and theory analysis.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt pavements
KW  - Cracking
KW  - Load factor
KW  - Pavement layers
KW  - Pavement maintenance
KW  - Pavement performance
KW  - Structural analysis
UR  - https://trid.trb.org/view/902164
ER  - 

TY  - CONF
AN  - 01142189
AU  - Kim, Hyung Bae
AU  - Lee, Kwang-Ho
AU  - American Society of Civil Engineers
TI  - An Innovative Rehabilitation Approach for the Bridge Deck Pavement
SN  - 9780784410486
PY  - 2009
SP  - pp 19-27
AB  - This study presents a rehabilitation method for the bridge deck pavement which has been damaged due to a moisture related failure of the asphalt concrete. In order to quickly drain the water which has infiltrated into the bridge deck pavement, this rehabilitation method adopts a new drainage system including a porous asphalt concrete layer and a polymer concrete based waterproofing layer so that the water cannot stay and cause moisture-related failure on the bridge deck. The most important factors for this drainage system are to meet satisfactory performance of the repairing material for the damaged concrete bridge deck, the waterproofing layer, and to develop a fast-track construction technique with a limited traffic blocking time. The porous asphalt mixtures for the new drainage system was suggested with the maximum aggregate size of 10mm, and was validated through various physical and mechanical laboratory tests to confirm its performance characteristics. In this study, methyl methacrylate (MMA)-type material was introduced for the water-proofing on the concrete bridge deck and damaged bridge deck repairing, and the results from a series of mechanical tests for evaluating the performance of the MMA material shows it has good capability for waterproofing and repairing of the concrete bridge deck which is subject to a moisture-induced neutralization of the cement concrete. In addition, to evaluate the field performance of the new rehabilitation method, a field study was conducted on a real bridge. Field performance observations on both the MMA and pavement materials indicated that the new method performs much better than traditional methods in draining water that has infiltrated into pavement layers.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt concrete
KW  - Asphalt mixtures
KW  - Bridge decks
KW  - Highway bridges
KW  - Methyl methacrylate
KW  - Moisture content
KW  - Pavement performance
KW  - Rehabilitation (Maintenance)
UR  - https://trid.trb.org/view/902292
ER  - 

TY  - CONF
AN  - 01142188
AU  - Yan, Kezhen
AU  - Zhang, Jinzhao
AU  - Wu, JianLiang
AU  - Wu, Luocheng
AU  - American Society of Civil Engineers
TI  - Asphalt Pavement Evaluation Based on Matter Element Model
SN  - 9780784410479
PY  - 2009
SP  - pp 18-24
AB  - Pavement performance evaluation is one of the most important problems in pavement management system. In traditional methods for pavement performance evaluation, the weights of evaluation indexes are hard to determine and mainly depended on subjective judgment. The paper get the evaluation indexes by employing the concept of entropy and the weights of the evaluation indexes are obtained from surveying data. The matter element model for pavement evaluation is established. By calculating the dependence degree of the matter element model, the pavement evaluation is obtained. The results show that the matter element model has good ability to evaluate the pavement performance.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt pavements
KW  - Entropy (Statistical mechanics)
KW  - Evaluation and assessment
KW  - Pavement management systems
KW  - Pavement performance
KW  - Systems of measurement
UR  - https://trid.trb.org/view/902152
ER  - 

TY  - CONF
AN  - 01142187
AU  - Jeon, Sungil
AU  - Nam, Jeong-Hee
AU  - An, Ji-Hwan
AU  - Kwon, Soo Ahn
AU  - American Society of Civil Engineers
TI  - Physical Properties of Rapid-Setting Concrete Using Ultra Fine Fly Ash
SN  - 9780784410486
PY  - 2009
SP  - pp 107-118
AB  - Generally, Ultra Fine Fly Ash (UFFA) has the advantage that it advances greater concrete workability and that it activates a greater pozzolanic reaction than common fly ash due to its ultra fine particle size. These properties enhance concrete durability by reducing permeability and increasing resistance to alkali silica reaction (ASR) and sulfate attack, etc. For these reasons, UFFA can be used in rapid setting concrete. The purpose of this study is to develop and evaluate the rapid setting concrete with UFFA as a repair material for early-opening-to-traffic. In previous studies, if only UFFA is added to the rapid setting concrete mixture, the pozzolanic reaction does not happen actively. In this study, the chemical and physical tests were performed for rapid setting concrete with a combination of UFFA and calcium hydroxide. This enabled the activity of pozzolanic reaction to be evaluated as well as the effectiveness of this mixture on enhancing concrete durability was investigated. This study found that adding UFFA decreased the water/cement ratio of concrete and compensated the reduced portion of the early strength of concrete. Additionally, rapid setting concrete with UFFA and calcium hydroxide activated a greater pozzolanic reaction than normal-UFFA concrete. As the calcium hydroxide increased, the electrical indication of the concrete’s ability to resist chloride ion penetration was promoted significantly.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Alkali silica reactions
KW  - Concrete
KW  - Concrete curing
KW  - Fly ash
KW  - Grain size (Geology)
KW  - Permeability
KW  - Physical properties
KW  - Rapid set materials
UR  - https://trid.trb.org/view/902336
ER  - 

TY  - CONF
AN  - 01142186
AU  - Xiong, Baolin
AU  - Lu, Chunjiao
AU  - American Society of Civil Engineers
TI  - Simulation and Amelioration of Wu-Bauer Hypoplastic Constitutive Model under Dynamic Load
SN  - 9780784410493
PY  - 2009
SP  - pp 74-79
AB  - The stress-strain relation of sand can be modeled with Wu-Bauer hypoplastic constitutive model, in which the magnitude and direction of stress increment depend on not only the previous stress state, but also the magnitude and direction of current strain increment. The parameters of this model can be determined conveniently by simple triaxial test. Under static load Wu-Bauer hypoplastic constitutive model can well simulate strength and deformation of sand. But under dynamic load, the major shortcoming—ratcheting is produced in Wu-Bauer hypoplastic constitutive model. For eliminating ratcheting, Wu-Bauer hypoplastic model is ameliorated based on intergranular strain tensor. The new parameters in ameliorated model are determined by mode search method. Under cyclic load of oedometric compression and undrained dynamic triaxial, the mechanics features of sand are described by the ameliorated Wu-Bauer hypoplastic constitutive model. Preliminary result shows that stress-strain relation of sand under dynamic load can be well considered and ratcheting may be removed in the ameliorated Wu-Bauer hypoplastic constitutive model.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Constitutive models
KW  - Deformation curve
KW  - Dynamic loads
KW  - Elastoplasticity
KW  - Geotechnical engineering
KW  - Simulation
KW  - Static loads
UR  - https://trid.trb.org/view/902436
ER  - 

TY  - CONF
AN  - 01142184
AU  - Chen, Hanli
AU  - Qin, Tao
AU  - American Society of Civil Engineers
TI  - Studies on Risk Management of the Urban Infrastructure Projects Based on the BOT Financing Model
SN  - 9780784410479
PY  - 2009
SP  - pp 39-46
AB  - With the acceleration of urbanized advancement in China, governments’ high investment and low efficiency in urban infrastructure projects have already become a worldwide problem. The build operate transfer (BOT) financing model can be combined with government policy supports, investor’s abundant fund and advanced management. The BOT financing model in urban infrastructure projects has greater risks, so their risk management is of great significance. The paper establishes risk evaluation index system of urban infrastructure projects on the BOT financing model, and sets up the risk evaluation model by use of Analytic Hierarchy Process (AHP) and Fuzzy Mathematics. We partially modify weight of AHP, by Fuzzy Cluster Analysis. Next, we establish the risk allocation model of urban infrastructure projects. Finally, we carry empirical analysis about the risk problem of an urban infrastructure project. Through comparing with result of model evaluation and measure of the risk allocation, empirical analysis indicates that the evaluation result of the model can reflect the risk situation of project thoroughly and objectively.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Analytical hierarchy process
KW  - Build operate transfer
KW  - China
KW  - Financing
KW  - Fuzzy systems
KW  - Infrastructure
KW  - Risk allocation
KW  - Risk management
KW  - Urban areas
UR  - https://trid.trb.org/view/902275
ER  - 

TY  - CONF
AN  - 01142181
AU  - Shahin, Mohamed A
AU  - American Society of Civil Engineers
TI  - Design of Ballasted Railway Track Foundations under Cyclic Loading
SN  - 9780784410493
PY  - 2009
SP  - pp 68-73
AB  - The foundations of ballasted railway tracks are usually consisted of a graded layer of granular media of ballast placed above a naturally deposited subgrade. Available methods for design of track foundations are based on determination of an adequate granular layer thickness of ballast so that subgrade shear failures and plastic deformations produced by the transmission of imposed train loads are prevented. However, the deformation of ballast itself is ignored in almost all available design methods. In addition, most available methods do not represent true cyclic loading situations and rather provide oversimplified solutions based on static loading conditions. In this paper, a method that can be used to calculate the deformation of ballast under train cyclic loading is presented. The method is deemed to complement the existing methods of design of ballasted railway track foundations.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Ballast (Railroads)
KW  - Deformation
KW  - Foundations
KW  - Railroad tracks
KW  - Repeated loads
KW  - Shear strength
KW  - Subgrade materials
UR  - https://trid.trb.org/view/902364
ER  - 

TY  - CONF
AN  - 01142179
AU  - Liu, Chun-Yuan
AU  - Gong, Wen-Yi
AU  - Li, Xiao-Ying
AU  - Shi, Jin-Na
AU  - American Society of Civil Engineers
TI  - Research on the Criterion of Instability of the High-Fill Soft Roadbed
SN  - 9780784410493
PY  - 2009
SP  - pp 243-248
AB  - In one fleet of a freeway construction, the right side of the roadbed suddenly taken place to sideslip and collapse largely towards outside, then the left side of it began to slip and collapse too. The slumping section is 130 m, and the highest degree of collapse of the Roadbed slump is 4.3m, both the pavement of construction and the lateral reed field welling up for 1.0m, settlement crack appears in the culvert around the fleet, among which the width of largest crack is 40cm. The wall of the culvert have distorted deformation. The creeping section ranges from the freeway "K39+720" to "K39+920", within which "K39+720"—"K39+868" was treated by Plastic Drainage Board and "K39+868"—"K39+920" was treated by concrete mixed piles. Not before the fifth day did the landslip stopped. The main content of this passage is to analyze the main factors that affect the Slope progressive failure calculating result. In use of this theory, two-dimensional progressive failure about the slope mentioned above can be calculated; and then on the results of the slope program, the security analysis on the slope combined with specific characteristics is carried. At last, design standards on security indicators of the high-fill soft soil roadbed are given.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Collapsible soils
KW  - Pavement cracking
KW  - Road construction
KW  - Slope stability
KW  - Soft soils
KW  - Subgrade (Pavements)
KW  - Subgrade materials
UR  - https://trid.trb.org/view/902433
ER  - 

TY  - CONF
AN  - 01142178
AU  - Zhu, Zhi-Hui
AU  - Yu, Zhi-Wu
AU  - Wei, Hong-Wei
AU  - Wu, Fang-Bo
AU  - American Society of Civil Engineers
TI  - Transmitting Artificial Boundary of Attenuating Wave for Saturated Porous Media
SN  - 9780784410493
PY  - 2009
SP  - pp 48-55
AB  - Based on the constitutive equation of saturated porous media, the attenuating wave multi-transmitting artificial boundaries (AMT-ABs) for transient analysis in case of 2D and 3D are developed and its reflection coefficients are also presented. Compared with the reflection coefficient of homogeneous plane wave multi-transmitting artificial boundary (HMT-AB), the reflection coefficient of AMT-AB is the least. Via programming in APDL provided by ANSYS, AMT-AB was added into ANSYS. Numerical example is given and the analyzed results show that the AMT-AB is the most accurate artificial boundary to analyze sophisticated dynamic problems than other major local artificial boundaries.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Attenuation (Engineering)
KW  - Boundary layer
KW  - Dynamic loads
KW  - Earthquakes
KW  - Geotechnical engineering
KW  - Porous materials
KW  - Reflection
UR  - https://trid.trb.org/view/902441
ER  - 

TY  - CONF
AN  - 01142175
AU  - Ali, Liaqat
AU  - Woods, Richard D
AU  - American Society of Civil Engineers
TI  - Creating Artificially Cemented Sand Specimen with Foamed Grout
SN  - 9780784410493
PY  - 2009
SP  - pp 95-100
AB  - It has been shown by researchers that small amount of cementation greatly strengthens and stiffens sands. These improvements help stabilize slopes against earthquake shaking and stabilize loose, saturated sand deposits against liquefaction. Grouting practice and most grouting research has dealt with saturation grouting, however recent research has shown that partial filling of void space with cementitious grout improves strength and stiffness of sand in a very favorable way and at a low cost per unit volume. Upto now there has been no way to artificially create partial void volume grouting of sand except by physical mixing. This paper describes one way of achieving this result by the injection process using a foamed sodium silicate grout.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Cement
KW  - Foams
KW  - Grouting
KW  - Liquefaction
KW  - Sand
KW  - Saturated soils
KW  - Soil stabilization
UR  - https://trid.trb.org/view/902362
ER  - 

TY  - CONF
AN  - 01142174
AU  - Xu, Zhihong
AU  - Zhou, J
AU  - Zeng, Yuan
AU  - American Society of Civil Engineers
TI  - Microscopic Mechanics for Failure of Slope and PFC: Numerical Simulation
SN  - 9780784410493
PY  - 2009
SP  - pp 115-122
AB  - The digital image analysis technology and non-target digital photography deformation measurement system have been adopted to measure the deformation and failure of slope in the model test. Based on the theory of the Particle Flow Code (PFC), the displacement and fracture surface of sand and clay slope are numerically simulated, and the displacement, rotation of granule and the variation of porosity inside the shear band are interpreted from the aspect of meso-mechanics. In addition, various constitutive relationships of particle contacts corresponding to different soil types are introduced to analyze the failure forms and the effect of meso-parameters on the macroscopic mechanical properties of sand and clay slope.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Geotechnical engineering
KW  - Imaging systems
KW  - Numerical analysis
KW  - Sandy clays
KW  - Simulation
KW  - Slope failure
KW  - Slope stability
UR  - https://trid.trb.org/view/902427
ER  - 

TY  - CONF
AN  - 01142173
AU  - Zhou, Liang
AU  - Chen, Feicheng
AU  - Yuan, Jiang
AU  - Qi, Xie
AU  - American Society of Civil Engineers
TI  - Influence of Water Saturated State on Moisture Susceptibility of Asphalt Mixture
SN  - 9780784410479
PY  - 2009
SP  - pp 109-114
AB  - Various test procedures and index exist to identify the susceptibility of asphalt mixtures to moisture damage. This paper concerns on Marshall in Saturation State test that can be used to quantify the moisture damage of asphalt mixture. The procedure consists of Marshall test prior to different water bath for an extended period of time. The Retained Marshall Stability Ratio in Immersion Saturated State (RRISS) after the absorption test is used as an indication of sensitivity of the compacted mixture to moisture damage. The results show that RRISS is able to discern different asphalt mixture combinations in terms of their moisture susceptibility.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Absorption
KW  - Asphalt mixtures
KW  - Asphalt pavements
KW  - Marshall test
KW  - Moisture content
KW  - Moisture damage
KW  - Percent saturation
UR  - https://trid.trb.org/view/902166
ER  - 

TY  - CONF
AN  - 01142172
AU  - Yang, Youzhen
AU  - Ge, Xiurun
AU  - American Society of Civil Engineers
TI  - Combined Mode Decomposition and Precise Integration Method for Vibration Response of Beam on Viscoelastic Foundation
SN  - 9780784410493
PY  - 2009
SP  - pp 36-41
AB  - In this research, an approach combining the precise time integration method (PTIM) and mode decomposition method is proposed to compute the response of beam structures resting on viscoelastic foundation. The PTIM has high precision, high efficiency, but it still suffers from the problem of large-size matrices when directly computing structure. And this problem can be overcome by mode superposition. Thus, the present paper integrates the PTIM and mode decomposition method together which holds the explicit recurrence form of precise algorithm. Comparing with the other numerical methods, it is found that the presented method is much more precisely and time-saving. The effect of the speed of moving load, the foundation stiffness and the length of the beam on the response of beam have also been studied. These numerical computation results show that the present method is effective and feasible.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Beams
KW  - Decomposition
KW  - Foundations
KW  - Integrated systems
KW  - Vibration
KW  - Viscoelasticity
UR  - https://trid.trb.org/view/902360
ER  - 

TY  - CONF
AN  - 01142171
AU  - Wei, Hong-Wei
AU  - Yu, Ze-Hong
AU  - Zhang, Jian-Hua
AU  - Zhu, Zhi-Hui
AU  - Yang, Xiao-Li
AU  - American Society of Civil Engineers
TI  - Influence of Soil Strength on Reinforced Slope Stability and Failure Modes
SN  - 9780784410493
PY  - 2009
SP  - pp 123-132
AB  - Finite element method was applied to analyze the reinforced slope stability in the paper, and under conditions of reinforcement materials matched with soil of various strengths, the shear zone characteristics and failure modes, as well as the influences of the soil strength parameters on reinforced effect, were also investigated. Results showed that reinforcement had increased significantly the apparent cohesion of soil, the reinforced sandy slope was damaged along a certain sliding arc, and appeared the cohesive slope destruction characteristics, the failure modes of the traditional sand slopes were varied correspondingly, and the integrity and stability of sandy slopes were all improved. Even with the same reinforcement material, reinforcement effect on the stability of the slope differed with various index of soil strength. The selection of the strength combinations of reinforcement and soil within a certain range could sufficiently mobilize the interactions to improve the reinforcement effect. Results also showed that reinforcement could improve the soil strength and enhance the stability of the slope to a certain extent, but could not change the main body of soil in the reinforced slope. Considering the combination of reinforcement and soil is crucial to ensure the reinforced effect in reinforced slope design.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Failure
KW  - Finite element method
KW  - Imaging systems
KW  - Sandy clays
KW  - Slope failure
KW  - Slope stability
KW  - Soil stabilization
UR  - https://trid.trb.org/view/902376
ER  - 

TY  - CONF
AN  - 01142170
AU  - Stevens, Robert D
AU  - American Society of Civil Engineers
TI  - Transportation and Land Use – Is There a Relationship?
SN  - 9780784410592
PY  - 2009
SP  - pp 131-140
AB  - Throughout the authors’ career there have been a number of opportunities to work on or to observe projects involving transportation and land use. Nine of these projects are presented to illustrate that there is a relationship between transportation and land use. Some of these relationships turned out good while others did not. By citing these examples, it is clear that all planning must be cognizant of and pay particular attention to the transportation/land use relationship if the best sustainable development is to occur.
U1  - 2009 Transportation, Land Use, Planning, and Air Quality ConferenceAmerican Society of Civil EngineersFederal Highway AdministrationTransportation Research BoardCenter for Transportation Research and EducationUniversity of North Carolina, CharlotteDenver,Colorado,United States StartDate:20090725 EndDate:20090729 Sponsors:American Society of Civil Engineers, Federal Highway Administration, Transportation Research Board, Center for Transportation Research and Education, University of North Carolina, Charlotte
KW  - Land use planning
KW  - Planning and design
KW  - Relationships
KW  - Sustainable development
KW  - Transportation planning
UR  - https://trid.trb.org/view/902082
ER  - 

TY  - CONF
AN  - 01142169
AU  - Tao, Xiang-hua
AU  - American Society of Civil Engineers
TI  - Differential Settlement Control Criterion of Bridge-Approach on People-Vehicle-Road Interaction
SN  - 9780784410486
PY  - 2009
SP  - pp 133-139
AB  - The bump on bridge-approach has been an urgent worldwide problem on highways and bridges, caused by differential settlement between bridge abutment and approaching pavement. But the existing calculation models and methods of bridge-approach pavements could not describe and explain the mechanism of bump under vehicle dynamic load appropriately. So this paper adopts human weighed acceleration RMS (Root Mean Square) to evaluate ride comfort when the vehicle is passing through bridge-approach, and road unevenness model of bridge-approach is build up by exponential settlement curve, and effect factors of vehicle ride comfort are analyzed that velocity, the maximum differential settlement and settlement length have the important effect on people ride comfort. At last, the author builds up differential settlement control criterion of bridge-approach on people-vehicle-road interaction.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bridge abutments
KW  - Bridge approaches
KW  - Bumps
KW  - Highway bridges
KW  - Pavement performance
KW  - Ride quality
KW  - Rolling contact
KW  - Settlement (Structures)
UR  - https://trid.trb.org/view/902285
ER  - 

TY  - CONF
AN  - 01142168
AU  - Yi, Wen
AU  - Wang, Yonghe
AU  - Lu, Yungang
AU  - American Society of Civil Engineers
TI  - Zhuque Hole Landslide Disaster Research
SN  - 9780784410493
PY  - 2009
SP  - pp 101-107
AB  - This article examines the landslide disasters of July 27, 2008. It was concluded that rock near the road was weakened by water causing creep deformation. Also, heavy long-term rains in the area contributed to conditions right for landslides. Each of the three areas affected along the roadside were approached with a different technique. The landslide on the left side of the road was managed by using bolt reinforcement. The area between roads was managed by changing the line. To the right of the road an anchor line and antiskid stick was used.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - China
KW  - Creep
KW  - Deformation
KW  - Disasters
KW  - Landslides
KW  - Rainfall
KW  - Research
KW  - Slope stability
UR  - https://trid.trb.org/view/902443
ER  - 

TY  - CONF
AN  - 01142167
AU  - Ali, Liaqat
AU  - Woods, Richard D
AU  - American Society of Civil Engineers
TI  - Pendular Element Model for Contact Grouting
SN  - 9780784410493
PY  - 2009
SP  - pp 87-94
AB  - Foam grouting can be used to increase the strength and rigidity of unconsolidated sands. Foam grouting consists of reinforcing sands by depositing chemical grout at the inter-particle contacts in the form of pendular elements without filling the voids, contrary to conventional grouting processes, in which soil matrix is saturated with grout. This paper presents a theoretical model for characterizing the grout pendular elements in terms of degree of cementation, fill angle, and the separation distance between the particles. The model is validated by the experimental results obtained from a Resonant Column Device, and micrographs obtained from a scanning electron microscope. The experimental results closely match the results obtained from the theoretical model.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Air voids
KW  - Cement
KW  - Foams
KW  - Geotechnical engineering
KW  - Grouting
KW  - Sand
KW  - Sandy clays
KW  - Scanning electron microscope
UR  - https://trid.trb.org/view/902430
ER  - 

TY  - CONF
AN  - 01142165
AU  - Chen, Dar Hao
AU  - Crawford, Taylor
AU  - Fowler, David  W
AU  - Jirsa, James O
AU  - Stringer, Megan
AU  - Whitney, David P
AU  - Won, Moon C
AU  - American Society of Civil Engineers
TI  - Repair of Longitudinal Joints and Cracks
SN  - 9780784410486
PY  - 2009
SP  - pp 119-124
AB  - Longitudinal cracking and longitudinal joint separations are commonly observed distresses in concrete pavements. The Texas Department of Transportation instituted a research project to determine the causes and to recommend repair methods. Repair methods that are generally recommended to repair cracks and joints are (1) cross stitching; (2) slot stitching; and (3) stapling. Finite element modeling was performed to determine the stress distribution in the concrete for each method when a truck tire load was placed on one side of the joint. Assuming no interlock between joint faces, the slot stitching model produced the lowest stress and cross stitching produced the highest stress, when the load was placed on the upper end of the diagonal bar. Cross stitching is recommended for repairing narrow cracks and slot stitching is recommended for wider cracks and joints.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Concrete pavements
KW  - Cracking of asphalt concrete pavements
KW  - Finite element method
KW  - Hunan (China)
KW  - Longitudinal cracking
KW  - Pavement distress
KW  - Pavement maintenance
KW  - Structural analysis
UR  - https://trid.trb.org/view/902342
ER  - 

TY  - CONF
AN  - 01142164
AU  - Li, Xue-lian
AU  - Chen, Yu-liang
AU  - American Society of Civil Engineers
TI  - New Composite Pavement System for Orthotropic Steel Bridge Decks
SN  - 9780784410486
PY  - 2009
SP  - pp 76-84
AB  - Orthotropic steel bridge decks are widely used for large and medium span bridges, however early failure in traditional asphalt concrete surfaces has proved to be a problem on high traffic routes. Consequently, a demand exists to find a durable overlay for such bridges. In this paper, four kinds of design indices are explored, based on the primary types of pavement distress. In addition, the mechanics of surface wear on orthotropic steel bridges was analyzed by the Finite Element Method (FEM), which shows that the higher elastic modulus of the intermediate layer and/or the thicker the wearing surface, the less stress there is in the critical fatigue parts of the surface and the more favorable the wearing surface is. A new composite wearing surface system was presented, with a cement-based intermediate layer, shear stud connector, and SMA13 surface. Also, a number of small-scale tests were conducted to investigate the performance of bonding the new composite overlay to a steel plate, such as the thermal compatibility, rutting test under high temperature, and fatigue durability of the new composite wearing surface system. These were then compared to the traditional double-layer asphalt concrete surface. It was concluded that the performance of the new composite system is more durable than the traditional one.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bridge decks
KW  - Cement
KW  - Composite pavements
KW  - Fatigue (Mechanics)
KW  - Finite element method
KW  - Orthotropic plates
KW  - Reinforcement (Engineering)
KW  - Steel bridges
KW  - Wearing course (Pavements)
UR  - https://trid.trb.org/view/902327
ER  - 

TY  - CONF
AN  - 01142163
AU  - Lutin, Jerome M
AU  - Goodman, Charles R
AU  - Saigal, Suni
AU  - American Society of Civil Engineers
TI  - Planning for Sustainability—Analyzing the Fit Between Land Use Policy and Transit Investments
SN  - 9780784410592
PY  - 2009
SP  - pp 151-160
AB  - This paper documents a research project being carried out by the New Jersey Institute of Technology (NJIT). The goal of the project is to improve the economic and environmental sustainability of urban areas through compatible systems-level planning and land uses, urban form, and investments in public transportation facilities. The project also seeks to improve the communication of these concepts to elected officials and the public through the development of enhanced visualization techniques. The research is intended to answer questions about the interaction of land use policies and transit investments, posed in two forms. First, if alternative transit investment proposals are being evaluated for a community, what land use policies will be needed to optimize the effectiveness of those investments? Second, if specific changes in land use policy are being considered for a community, what types of transit investment will be most cost-effective for each land use policy scenario?
U1  - 2009 Transportation, Land Use, Planning, and Air Quality ConferenceAmerican Society of Civil EngineersFederal Highway AdministrationTransportation Research BoardCenter for Transportation Research and EducationUniversity of North Carolina, CharlotteDenver,Colorado,United States StartDate:20090725 EndDate:20090729 Sponsors:American Society of Civil Engineers, Federal Highway Administration, Transportation Research Board, Center for Transportation Research and Education, University of North Carolina, Charlotte
KW  - Capital investments
KW  - Economic development
KW  - Land use planning
KW  - New Jersey
KW  - Planning and design
KW  - Policy making
KW  - Public transit
KW  - Sustainable development
UR  - https://trid.trb.org/view/902085
ER  - 

TY  - CONF
AN  - 01142162
AU  - Zhang, Jiupeng
AU  - Pi, Yuhui
AU  - Huang, Xiaoming
AU  - American Society of Civil Engineers
TI  - Development and Verification of Creep Constitutive Model for Asphalt Mixture Based on Continuum Damage Theory
SN  - 9780784410479
PY  - 2009
SP  - pp 115-121
AB  - The three-stage creep behavior of asphalt mixture could be considered as the results of a competition between damage and hardening. Therefore, the damage and hardening variables were both introduced into Burgers model for modification. The series-wound dashpot in Burgers model was modified with a hardening variable and the undamaged mechanistic model was derived from rheological. Then, Kachanov’s equation of damage evolution was adopted and a new creep constitutive model coupled with damage was established by Lemaitre’s effective stress principle. Subsequently, static creep tests of two asphalt mixtures were conducted to validate the modified model, and an algorithm was established to determine the model parameters from typical laboratory data. The proposed model and algorithm were demonstrated through laboratory test results, and the analysis results matched the test perfectly. It is indicated that the proposed model can describe the three-stage behavior well.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt mixtures
KW  - Burgers contact model
KW  - Creep tests
KW  - Hardness
KW  - Laboratory tests
KW  - Rheological properties
KW  - Verification
UR  - https://trid.trb.org/view/902158
ER  - 

TY  - CONF
AN  - 01142161
AU  - Li, Xue-lian
AU  - Chen, Yu-liang
AU  - American Society of Civil Engineers
TI  - Structure Mechanical Study on Overlay of the Tied Arch Concrete Bridge Deck
SN  - 9780784410486
PY  - 2009
SP  - pp 35-44
AB  - The structural behavior of the double-layered asphalt concrete Huanghe bridge was analyzed by the FEM (Finite Element Method). The most critical loading location for the bridge pavement was determined, and the control indexes for the asphalt pavement established. For the most adverse loading cases, the variations of asphalt overlays around wheel paths were analyzed and the corresponding three-dimensional graphs presented. To determine the influences of horizontal cyclic loads on the control index, different asphalt overlays under various horizontal cyclic loads were analyzed. To simulate the boundary conditions, the bridge, including beams, arch ribs, suspenders, and pavement were analyzed. Experiments were conducted in coordination with the finite element analysis. A relationship between shearing and bonding strength under varying temperatures was established, also, the interlayer stable control index, and bonding strength under 15°C, were determined. An in-situ pullout test was performed using the pullout apparatus designed by the research team to verify the stability of inter-layers.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Arch bridges
KW  - Asphalt concrete
KW  - Bonding
KW  - Bridge decks
KW  - China
KW  - Finite element method
KW  - Mechanical properties
KW  - Overlays (Pavements)
KW  - Structural analysis
UR  - https://trid.trb.org/view/902347
ER  - 

TY  - CONF
AN  - 01142160
AU  - Zha, Xudong
AU  - American Society of Civil Engineers
TI  - Sensitivity Analysis of Transverse Cracking for Continuously Reinforced Concrete Pavement
SN  - 9780784410486
PY  - 2009
SP  - pp 147-153
AB  - Sensitivity analyses for transverse cracking of Continuously Reinforced Concrete Pavement (CRCP) were investigated for the CRCP structure of Lei-Yi (Leiyang to Yizhang) Expressway in Hunan Province, China. The investigation included 13 main parameters (slab thickness, elastic modulus of steel, temperature shrinkage coefficient of steel, drying shrinkage strain, compression strength, creep coefficient of concrete, elastic modulus of concrete, temperature shrinkage coefficient of concrete, diameter and spacing of longitudinal reinforcement, base friction coefficient, reinforcement bond strength and temperature differences) at 5 different levels. The average crack spacing, the average crack width and the maximum reinforcement stress were simultaneously calculated with the iterative algorithms according to the one-dimension nonlinear analysis method. It considered the creep action and the nonlinear boundary properties that took into account the bond-slip between reinforcement and concrete, and the friction-slip between slab and base. The sensitivities of CRCP transverse cracking influenced by each factor were analyzed with the relative comparison method quantitatively and qualitatively. The results show that the main factors impacting the CRCP transverse cracking included shrinkage properties of concrete, concrete grade, spacing and diameter of reinforcement, and the grade and type of reinforcement.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - China
KW  - Concrete
KW  - Concrete pavements
KW  - Continuously reinforced concrete pavements
KW  - Cracking
KW  - Reinforced concrete
KW  - Sensitivity analysis
KW  - Shrinkage
KW  - Transverse cracking
UR  - https://trid.trb.org/view/902344
ER  - 

TY  - CONF
AN  - 01142159
AU  - Tian, Xiaoge
AU  - Lin, Du
AU  - Wu, Wenbiao
AU  - American Society of Civil Engineers
TI  - Evaluation of PCCP Performance Based on Fuzzy Complex Matter Element Method
SN  - 9780784410479
PY  - 2009
SP  - pp 9-17
AB  - The performance evaluation of Portland cement concrete pavement (PCCP) is the key step in its maintenance, rehabilitation and overlay. A new evaluation index system was put forward considering the needs of PCCP overlay, based on the traditional evaluation index system, whose aim is mainly at maintenance. A systematic pavement performance evaluation model was established by using the fuzzy complex matter element method, and the weight of each factor was determined considering its objective and subjective weights, determined from Analytic Hierarchy Process (AHP) method and entropy method respectively. Finally, the pavement performance of a test road was evaluated using this method, and the evaluation result agrees with the actual pavement condition.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Analytical hierarchy process
KW  - Concrete pavements
KW  - Evaluation and assessment
KW  - Overlays (Pavements)
KW  - Pavement maintenance
KW  - Pavement performance
KW  - Portland cement concrete
KW  - Systems of measurement
UR  - https://trid.trb.org/view/902163
ER  - 

TY  - CONF
AN  - 01142156
AU  - Yang, Heping
AU  - Liao, Wenzhou
AU  - Zhong, Zhiyong
AU  - American Society of Civil Engineers
TI  - Analysis of Overturning Stability for Broken Back Retaining Wall by Considering the Second Failure Surface of Backfill
SN  - 9780784410493
PY  - 2009
SP  - pp 142-150
AB  - In the traditional analysis of overturning stability for broken back retaining wall, pressures acting on the upper and the lower parts of wall are calculated independently based on the hypotheses that earth pressure is linear distribution, and its resultant thrust is the vector sum of the pressures acting on the two parts; The existence of the second failure surface of backfill is judged by the formula of the critical angle for wall with gentle back as derived from Rankine theory. Not only this method is complicated, but also the relevant calculating results are tend to be unsafe Therefore, aiming at these problems, formulas for calculating the pressure on the second failure surface and the safety factor against overturning were derived by the horizontal differential element method considering the occurrence of the second failure surface. Then the traditional methods and the proposed one were compared by case studies. The results show that it is unsafe to design broken back retaining wall by these traditional methods and the critical angle formula for wall with gentle back is not suit for broken back retaining wall.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Backfilling
KW  - Earth pressure
KW  - Foundations
KW  - Geotechnical engineering
KW  - Retaining walls
KW  - Slope failure
KW  - Slope stability
UR  - https://trid.trb.org/view/902350
ER  - 

TY  - CONF
AN  - 01142155
AU  - DuRoss, Michael
AU  - Taromi, Reza
AU  - Faghri, Ardeshir
AU  - Thompson-Graves, Scott Michael
AU  - American Society of Civil Engineers
TI  - Special Allocation Effects Forecast Land Uses on Statewide Mobile Source Emissions
SN  - 9780784410592
PY  - 2009
SP  - pp 62-85
AB  - Transportation planners and engineers in the travel demand forecasting industry have developed and applied models using the four-step process for approximately forty years. These models have been widely supported and have supplied many traffic forecasts for regional, corridor, and community planning efforts. They also have been used to examine statewide travel demand issues such as congestion management and the long-term effects of forecast land development as related to capacity sufficiency. Further, since the 1990 Clean Air Act Amendments, these types of models have been used to estimate mobile source emissions supporting transportation conformity analyses.  The paper’s methodology involves development of eighteen discrete land use and/or transit service scenarios which will be compared against 2008 “existing conditions” and 2030 “trend estimates”. Each of the scenarios represents a distinct set of policy goals intended to alter the timing, location, and/or the mode choice of projected growth which is forecast to occur in Delaware between 2008 and 2030.
U1  - 2009 Transportation, Land Use, Planning, and Air Quality ConferenceAmerican Society of Civil EngineersFederal Highway AdministrationTransportation Research BoardCenter for Transportation Research and EducationUniversity of North Carolina, CharlotteDenver,Colorado,United States StartDate:20090725 EndDate:20090729 Sponsors:American Society of Civil Engineers, Federal Highway Administration, Transportation Research Board, Center for Transportation Research and Education, University of North Carolina, Charlotte
KW  - Congestion management systems
KW  - Delaware
KW  - Environmental impacts
KW  - Land use planning
KW  - Mobile sources
KW  - Public transit
KW  - Traffic forecasting
KW  - Transportation corridors
KW  - Transportation planning
KW  - Travel demand
UR  - https://trid.trb.org/view/902075
ER  - 

TY  - CONF
AN  - 01142152
AU  - Porter, Christopher D
AU  - American Society of Civil Engineers
TI  - Greenhouse Gas Benefits of Land Use Strategies
SN  - 9780784410592
PY  - 2009
SP  - pp 141-150
AB  - This presentation discusses the methodology and findings of sketch-level analyses of the vehicle-miles of travel (VMT) and corresponding greenhouse gas (GHG) benefits of implementing land use strategies to direct growth into higher-density, walkable, transit-served neighborhoods. The methodology has been applied at a national level for the “Moving Cooler” study in progress: at a state level in support of four state climate action plans; and in southern Maine. The analysis relies on data on VMT per capita by tract density to evaluate how future metropolitan “smart growth” policies that affect population density might affect VMT. The land use analysis also utilizes information from the recent “Growing Cooler” study, but does in no way that considers baseline population densities and trends in a particular analysis region as well as different levels of growth-shifting. Overall, VMT and GHG reductions relative to all personal travel range from around 1 percent of low growth areas in a short time frame (2005), up to 12 percent for very aggressive implementation of compact development at a nationwide level through the year 2050.
U1  - 2009 Transportation, Land Use, Planning, and Air Quality ConferenceAmerican Society of Civil EngineersFederal Highway AdministrationTransportation Research BoardCenter for Transportation Research and EducationUniversity of North Carolina, CharlotteDenver,Colorado,United States StartDate:20090725 EndDate:20090729 Sponsors:American Society of Civil Engineers, Federal Highway Administration, Transportation Research Board, Center for Transportation Research and Education, University of North Carolina, Charlotte
KW  - Climate change
KW  - Environmental impacts
KW  - Greenhouse gases
KW  - Land use planning
KW  - Maine
KW  - Smart growth
KW  - Strategic planning
KW  - Sustainable development
KW  - Vehicle miles of travel
UR  - https://trid.trb.org/view/902083
ER  - 

TY  - CONF
AN  - 01142151
AU  - Gaul, Robert
AU  - American Society of Civil Engineers
TI  - A Long Life Pavement for Orthotropic Bridge Decks in China
SN  - 9780784410486
PY  - 2009
SP  - pp 1-8
AB  - Pavements on orthotropic steel bridge decks in China have typically lasted three to seven years until the introduction of Epoxy Asphalt at the 2nd Yangtze River Bridge at Nanjing. The thermoset nature of Epoxy Asphalt compared to the thermoplastic bitumen paving materials previously used accounts for its ability to satisfy the requirements of skid resistance, a uniform riding surface and steel deck waterproofing for extended years even under severe ambient and load conditions. As of the end of 2008 over 500,000 square meters of Epoxy Asphalt have been installed on 20 orthotropic steel bridges in China. These installations are performing very well with few problems. Extensive laboratory test programs have been conducted to characterize the properties of this unique paving material. Although there are strict time and temperature constraints in the construction of Epoxy Asphalt pavements Chinese contractors have quickly learned how to install these pavements without significant problems.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt pavements
KW  - Bridge decks
KW  - China
KW  - Epoxy coatings
KW  - Orthotropic plates
KW  - Steel structures
KW  - Waterproofing
UR  - https://trid.trb.org/view/902324
ER  - 

TY  - CONF
AN  - 01142149
AU  - Kang, Zhi-Qiang
AU  - Wang, Run-Sheng
AU  - Guo, Li-Wen
AU  - Sun, Zhong-Qiang
AU  - American Society of Civil Engineers
TI  - Rock Slope Quality Evaluation Based on Matter Element Model
SN  - 9780784410493
PY  - 2009
SP  - pp 190-196
AB  - To solve the problem of rock slope failure in mountain express highway construction, extenics predicted method of rock slope stability of highway rock slope was proposed on the basis of extenics theory analysis based on matter element model. Classical and section field were established by using stable rank and influence factor of rock slope. By the usage of associated function in extenics sets, extenics forecast model of synthesis judgment of rock slope stability rank was set up, and the prediction results were obtained through extenics evaluation analysis. The example analysis shows that this extenics forecast method can forecast the rank problem of rock slope quality further accurately and scientifically, which provides more reliable basis for taking economic and reasonable reinforcement protection steps.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Evaluation and assessment
KW  - Geotechnical engineering
KW  - Rock slopes
KW  - Rocks
KW  - Slope failure
KW  - Slope stability
UR  - https://trid.trb.org/view/902434
ER  - 

TY  - CONF
AN  - 01142148
AU  - Wu, Rongzong
AU  - Harvey, John T
AU  - American Society of Civil Engineers
TI  - A Cyclic Cohesive Crack Model Based on Bounding Surface Concept
SN  - 9780784410479
PY  - 2009
SP  - pp 158-164
AB  - Cohesive crack model (CCM) is essentially a type of non-linear fracture mechanics that can deal with large fracture process zones in inhomogeneous materials such as asphalt concrete (AC). CCM has been successfully used to model cracking under monotonic loading conditions. Its application to fatigue cracking is however limited due to the lack of well-developed mechanisms to account for progressive cracking damage caused cyclic loading. This paper incorporates the bounding surface concept into cohesive crack model and provides a systematic way for introducing hysteresis loop during loading and unloading into CCM. Model behaviors of the resulting cyclic CCM are then examined for reasonableness and flexibility.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt concrete
KW  - Cohesive crack model
KW  - Cracking
KW  - Fatigue cracking
KW  - Fracture mechanics
KW  - Load factor
KW  - Pavement performance
UR  - https://trid.trb.org/view/902157
ER  - 

TY  - CONF
AN  - 01142146
AU  - Auld, Joshua
AU  - Rashidi, Taha H
AU  - Lin, Jie (Jane)
AU  - American Society of Civil Engineers
TI  - Analysis of National County-Level Heavy-Duty Freight Truck Emissions
SN  - 9780784410592
PY  - 2009
SP  - pp 1-10
AB  - A national level travel demand model for heavy freight trucks was created to determine the effects if these vehicles on national air quality. A commodity-based freight flow model was created from various sources to estimate national county-level freight flows. The flows were then converted to truck trips through the use of payload factors determined from the vehicle inventory and use study (VIUS) database. Finally, the truck trips were assigned to a national highway network and heavy freight vehicle, vehicle miles traveled (VMT) was determined on the county level. The model performance was evaluated against both the results for another national level model, the Freight Analysis Framework, and against actual vehicle count data. The estimated truck activity characteristics were then input to a freight truck emission model to evaluate the air quality impacts of freight trucking. The model represents a new method for the development of freight truck travel demand models by using actual truck travel characteristics to fit the results of the gravity model procedure. This represents a useful advance in working around the lack of trip distribution data in the field of freight activity and air quality modeling.
U1  - 2009 Transportation, Land Use, Planning, and Air Quality ConferenceAmerican Society of Civil EngineersFederal Highway AdministrationTransportation Research BoardCenter for Transportation Research and EducationUniversity of North Carolina, CharlotteDenver,Colorado,United States StartDate:20090725 EndDate:20090729 Sponsors:American Society of Civil Engineers, Federal Highway Administration, Transportation Research Board, Center for Transportation Research and Education, University of North Carolina, Charlotte
KW  - Air quality
KW  - Diesel engine exhaust gases
KW  - Environmental impacts
KW  - Freight traffic
KW  - Freight transportation
KW  - Heavy duty trucks
KW  - Travel demand
KW  - Trucks
KW  - Vehicle miles of travel
UR  - https://trid.trb.org/view/902069
ER  - 

TY  - CONF
AN  - 01142145
AU  - Solanki, Pranshoo
AU  - Zaman, Musharraf M
AU  - American Society of Civil Engineers
TI  - Influence of Cement Kiln Dust on Strength and Stiffness Behavior of Subgrade Clays
SN  - 9780784410493
PY  - 2009
SP  - pp 14-21
AB  - A comparative laboratory study was conducted to evaluate the suitability of different percentages of cement kiln dust (CKD) for stabilizing three different types of subgrade clays. Cylindrical specimens were compacted and cured for 28 days in a moist room having a constant temperature and controlled humidity. After curing specimens were tested for unconfined compressive strength (UCS), modulus of elasticity (ME) and resilient modulus (Mr). These properties were compared with those of the raw clay specimens to determine the extent of enhancement. The study revealed that the addition of CKD substantially increased the UCS, ME and Mr values of the clay specimens. In addition, these improvements increased with the increase in the amount of CKD. The extent of improvement, however, was found to be dependent upon the characteristics of the clay such as plasticity index (PI) and silica/sesquioxide ratio (SSR).
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Cement
KW  - Cement kilns
KW  - Compressive strength
KW  - Kiln dust
KW  - Soft clays
KW  - Stiffness
KW  - Subgrade (Pavements)
KW  - Subgrade materials
UR  - https://trid.trb.org/view/902375
ER  - 

TY  - CONF
AN  - 01142144
AU  - Ruan, Minyan
AU  - Lin, Jie (Jane)
AU  - American Society of Civil Engineers
TI  - Freight Emission Modeling for Framework Phase One: Generating County-Level Freight Data using Public Sources
SN  - 9780784410592
PY  - 2009
SP  - pp 11-18
AB  - This is phase one of a multi-year research project funded by the National Center for Freight and Infrastructure Research and Education (CFIRE). The overall objective is to develop a regional freight planning model which can be applied to regional freight emission modeling. Analogous to passenger travel models, a regional freight planning model will require good quality regional freight survey data, the availability of which has been one of the biggest obstacle in freight modeling. This paper describes an on-going effort to generating county-level freight shipment data by commodity type using publicly available data sources as the first step to freight modeling.
U1  - 2009 Transportation, Land Use, Planning, and Air Quality ConferenceAmerican Society of Civil EngineersFederal Highway AdministrationTransportation Research BoardCenter for Transportation Research and EducationUniversity of North Carolina, CharlotteDenver,Colorado,United States StartDate:20090725 EndDate:20090729 Sponsors:American Society of Civil Engineers, Federal Highway Administration, Transportation Research Board, Center for Transportation Research and Education, University of North Carolina, Charlotte
KW  - Environmental impacts
KW  - Exhaust gases
KW  - Freight modeling
KW  - Freight traffic
KW  - Freight transportation
KW  - Pollutants
KW  - Regional planning
KW  - Traffic data
UR  - https://trid.trb.org/view/902070
ER  - 

TY  - CONF
AN  - 01142142
AU  - Zhang, Lei
AU  - Qian, Zhendong
AU  - Liu, Yun
AU  - American Society of Civil Engineers
TI  - Special Considerations and Analysis for the Bascule Bridge Pavement
SN  - 9780784410486
PY  - 2009
SP  - pp 28-34
AB  - The bascule bridge is one of the most appropriate bridges for ports and inland rivers from structural and economic viewpoints. However, the difficulty in successfully paving steel deck pavement remains to be solved for its wide applications. Serious premature failures of the pavements are found on many bascule bridges. So far, there is little discussion about this issue. In this study, the dynamic response of bascule bridge deck pavement was analyzed based on the different rotation velocities and different pavement elastic modulus for the Haihe Bridge being built in Tianjin, China, one of the largest bascule type bridges in the world. The results indicate that the shear stress of the pavement will increase greatly when the main girder opens wide, and simultaneously the girder rotation angle and rotation speed will lead to the non-uniform distribution of the shear stress. Since it is hard to control the pavement modulus due to the changing environmental temperature in the real world, an appropriate rotation velocity is suggested for reducing the shear stress between the pavement and the steel deck.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bascule bridges
KW  - Bridge decks
KW  - Bridge design
KW  - Movable bridges
KW  - Pavement performance
KW  - Rotation
KW  - Shear stress
KW  - Tianjin (China)
UR  - https://trid.trb.org/view/902345
ER  - 

TY  - CONF
AN  - 01142141
AU  - Zhu, Feng
AU  - Wah, Cheung Lam
AU  - Dong, Zejiao
AU  - American Society of Civil Engineers
TI  - Research on the Relationship between the Loading and the Conductivity of Smart Asphalt Concrete
SN  - 9780784410479
PY  - 2009
SP  - pp 165-170
AB  - Carbon fiber is used as the additive for the intelligent asphalt concrete. The relationship of the fiber volume and the concrete resistivity, and the relationship of the resistivity and the applied pressure were studied. The conductivity of asphalt concrete incorporating with carbon fiber changes with the magnitude of the applied pressure. This special characteristic of the material might be useful in the road engineering in two areas: (1) when pavement of this material are under loading, the change of the pressure can be reflected by measuring the resistivity of the material. The supervisor could monitor the loads of vehicle anywhere in the road network without the trouble of embedding sensors in the pavement. (2) If there are some defects that are difficult to be discover by visual method appear on the road, the supervisor could find them at the first time. According to the result of this paper, the conductivity of the asphalt concrete increases with the volume of fiber. The change is particularly prominent when the fiber volume is between the two mutant levels (with fibers of 4%–6%).
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt concrete
KW  - Asphalt concrete pavements
KW  - Carbon fibers
KW  - Concrete resistivity
KW  - Mechanical loads
KW  - Remote sensing
KW  - Smart materials
KW  - Thermal conductivity
KW  - Traffic loads
UR  - https://trid.trb.org/view/902271
ER  - 

TY  - CONF
AN  - 01142140
AU  - Huang, Xiao-ming
AU  - American Society of Civil Engineers
TI  - Effects of Material Design Parameters on Mechanical States of Bridge Deck Pavement
SN  - 9780784410486
PY  - 2009
SP  - pp 61-67
AB  - Bridge deck pavement suffers from more complicated stresses than ordinary pavement, and mechanical states of the paving layers are influenced by material design parameters. After mechanical computation, the effects of material design parameters on the mechanical state and the variation law of pavement are analyzed. Analytical results indicate that following the traditional HAM design method can not adapt to actual mechanical states, and easily result in usual distress types on the asphalt concrete paving. Economical and reasonable paving materials should be designed or developed according to mechanical paving characteristics, such as multilevel dense built-in modified HMA, fiber-reinforced asphalt concrete and modified SMA, which can harmonize paving layers as a whole, adapt to the deformations of bridge decks, improve the mechanical states of the paving layers, increase the service years, and offer some helpful references for similar bridge deck pavement design.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bridge decks
KW  - Bridge engineering
KW  - Highway bridges
KW  - Pavement design
UR  - https://trid.trb.org/view/902287
ER  - 

TY  - CONF
AN  - 01142138
AU  - Li, Xinkai
AU  - Ma, Songlin
AU  - Hou, Xiangshen
AU  - American Society of Civil Engineers
TI  - Deflection and Stress Analysis of Concrete Slab under Temperature and Axle Load Coupling
SN  - 9780784410486
PY  - 2009
SP  - pp 140-146
AB  - A concrete slab edge will tend to curl up when it is subjected to a negative temperature gradient extending through the slab thickness. The tendency to curl up can induce tensile stresses on the top of slab as the pavement is restrained by its weight or other factors. At present in cement concrete pavement design in China the total stress as a result of load stress plus temperature stress results in transverse crack from the bottom to top of the slab is the only transverse crack considered. In recently many researchers have noticed top-down cracks in concrete pavement slab, and the top-down cracking has been observed in China through coring. Therefore, in order to understand the influences of coupling curling and loading stress on slab cracking, the single slab resting on elastic foundation with frictionless interface is simulated by finite element model (FEM). In FEM the axle load positions from an edge of the slab to another edge are considered and the negative temperature gradients are considered also. From the calculated results when a negative temperature gradient is combined with an axle load, high tensile stress will occur on the top of slab, so top-down cracking will occur. Therefore, in concrete pavement design the top-down cracking in concrete pavement should be considered in the design.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Axle loads
KW  - China
KW  - Concrete pavements
KW  - Slabs
KW  - Temperature gradients
KW  - Tensile strength
KW  - Thickness
KW  - Transverse cracking
UR  - https://trid.trb.org/view/902284
ER  - 

TY  - CONF
AN  - 01142136
AU  - Xin, Xiang
AU  - Tang, Huiming
AU  - Fan, Lei
AU  - American Society of Civil Engineers
TI  - Analysis of the Long-Term Settlements of Chimney Foundation on Silty Clay
SN  - 9780784410493
PY  - 2009
SP  - pp 56-61
AB  - As an integral part of foundation design, long-term settlement monitoring is necessary for reasonable estimates of the long-term settlement of chimney foundation bearing on silty clay, particularly of organic soils, for which long-term settlement is significant. The height of the chimney studied in this paper is more than 210 m, and the foundation of chimney is mainly composed of silty clay. The chimney was constructed in stage and surcharged in an attempt to reduce post-constructed settlement. The settlements of subsoil and chimney were instrumented and monitored for about 3 years. Soil properties were determined from laboratory and field testing, and the parameters used for finite-element analysis were determined by back analysis. The settlements predicted by the advanced Grey Model showed reasonable agreement with measured ones. The predicted settlement of finite-element analysis was smaller than the measured values.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Chimneys
KW  - China
KW  - Foundations
KW  - Geotechnical engineering
KW  - Ground settlement
KW  - Organic soils
KW  - Silts
KW  - Silty clays
UR  - https://trid.trb.org/view/902357
ER  - 

TY  - CONF
AN  - 01142135
AU  - MEI, G X
AU  - Song, L H
AU  - ZAI, J M
AU  - American Society of Civil Engineers
TI  - Mechanical Analysis of Retaining Structure Considering Deformation and Validation
SN  - 9780784410493
PY  - 2009
SP  - pp 220-225
AB  - The non-linear relationship between displacement and earth pressure indicates that the earth pressure varies with the displacement, which affects the mechanical analysis of retaining structures. A model, based on commonly observed characteristics of earth pressure-displacement relationship, is developed to describe the relationship between earth pressure and displacement. The solution of the proposed is given in the paper. The comparison between the literature data and the predicted values from proposed model shows that the proposed model provides a good prediction of lateral earth pressure at relatively small displacement. Moreover, the results indicate that the displacement has a significant effect on earth pressures, which justifies the necessity of the proposed model.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Deformation
KW  - Dislocation (Geology)
KW  - Earth pressure
KW  - Embankments and retaining walls
KW  - Geotechnical engineering
KW  - Mechanical properties
KW  - Soil non-linearity
KW  - Validation
UR  - https://trid.trb.org/view/902377
ER  - 

TY  - CONF
AN  - 01142134
AU  - Zeng, Sheng
AU  - Sun, Bing
AU  - Yang, Shijiao
AU  - Tan, Kaixuan
AU  - American Society of Civil Engineers
TI  - Search for Critical Slip Surface and Reliability Analysis of Soil Slope Stability Based on MATLAB
SN  - 9780784410493
PY  - 2009
SP  - pp 184-189
AB  - The stability analysis of slope is a popular topic in geotechnical engineering, however, the key of stability analysis is how to determine the most dangerous sliding surface, but the traditional method is determined according to experience. Because the genetic algorithm has powerful adaptability and does well in searching the global optimum solution, it was applied to analyze the stability of slope based on the premise of circular sliding surface and the ideal of genetic algorithm. The realization on the genetic algorithm of circular sliding surface is to found circular failure analysis model based on the Bishop method and to search the circle center coordinate of the most dangerous sliding surface with the genetic algorithm toolbox of MATLAB. Then an interface program for the reliability analysis of soil slope stability is developed depended on the platform of MATLAB. The analysis of the numerical example shows that the method of this paper has a higher accuracy, higher iterative convergence speed and stronger adaptability than the traditional calculation method, and that the reliability of the most dangerous sliding surface is the minimum reliability, which provides reference for the optimization design of slope.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Genetic algorithms
KW  - Geologically affected surfaces
KW  - Geotechnical engineering
KW  - MATLAB (Computer program)
KW  - Reliability
KW  - Slip surfaces
KW  - Slope stability
UR  - https://trid.trb.org/view/902435
ER  - 

TY  - CONF
AN  - 01142132
AU  - Wilson, J H
AU  - Williams, Luana Z
AU  - Schreiber, Jackson J
AU  - Mullen, M A
AU  - Peterson, Thomas D
AU  - Strait, Randy
AU  - American Society of Civil Engineers
TI  - State Approaches to Reducing Transportation Sector Greenhouse Gas Emissions
SN  - 9780784410592
PY  - 2009
SP  - pp 95-109
AB  - To address climate change, many U.S. states are taking action to establish policies to reduce greenhouse gas emissions in all economic sectors. With the transportation sector contributing 28 percent of national greenhouse gas emissions in the United States in 2006, strategies to mitigate transportation sector emissions are an important component of state’s climate action plans. This paper summarizes the transportation and land use approaches that states have included in their climate action plans to date. Transportation and land use sector options are generally organized into three main categories: vehicle technology, fuels, and travel activity/land use. This paper adds a fourth category: vehicle operations to acknowledge that important mitigation options include how drivers operate their vehicles. Annual greenhouse gas reduction potential in 2012 and 2020 and cost effectiveness values are provided. The information in this paper provides a starting point for transportation practitioners to use when initiating their own evaluations of greenhouse gas mitigation options at the regional, state, or local level. The state-specific information on which this paper is based can be found at the Center for Climate Strategies website at http://www.climatestrategies.us.
U1  - 2009 Transportation, Land Use, Planning, and Air Quality ConferenceAmerican Society of Civil EngineersFederal Highway AdministrationTransportation Research BoardCenter for Transportation Research and EducationUniversity of North Carolina, CharlotteDenver,Colorado,United States StartDate:20090725 EndDate:20090729 Sponsors:American Society of Civil Engineers, Federal Highway Administration, Transportation Research Board, Center for Transportation Research and Education, University of North Carolina, Charlotte
KW  - Climate change
KW  - Emissions reduction
KW  - Environmental impacts
KW  - Exhaust gases
KW  - Greenhouse gases
KW  - Land use planning
KW  - Pollutants
UR  - https://trid.trb.org/view/902078
ER  - 

TY  - CONF
AN  - 01142130
AU  - American Society of Civil Engineers
TI  - Transportation, Land Use, Planning, and Air Quality. Selected Papers of the Transportation, Land Use, Planning and Air Quality Conference 2009
SN  - 9780784410592
PY  - 2009
SP  - 163p
AB  - The Transportation, Land Use, Planning, and Air Quality Conference 2009, held on July 28 and 29 in Centennial, Colorado, provided a forum to examine the challenges of balancing an increase in travel demand with growing air-quality concerns by emphasizing the latest research coordinating the advancements and environmental impacts of transportation. The main focus of the conference was the “moving cooler” study, implemented by various federal agencies, state and local governments, and interest groups with the goal of evaluating a broad range of climate change strategies. This proceedings includes selected, peer-reviewed papers that were presented at the conference, covering topics such as: environmental impacts of freight, effect of fuel prices, integrating land use into transit system planning, climate change, emissions, and air quality models, land-use models, and advancements in computing technology and modeling. The papers in this proceedings will be of great value to engineers working in the fields of climate change, transportation, and land use.
U1  - 2009 Transportation, Land Use, Planning, and Air Quality ConferenceAmerican Society of Civil EngineersFederal Highway AdministrationTransportation Research BoardCenter for Transportation Research and EducationUniversity of North Carolina, CharlotteDenver,Colorado,United States StartDate:20090725 EndDate:20090729 Sponsors:American Society of Civil Engineers, Federal Highway Administration, Transportation Research Board, Center for Transportation Research and Education, University of North Carolina, Charlotte
KW  - Air quality
KW  - Climate change
KW  - Environmental impacts
KW  - Exhaust gases
KW  - Greenhouse gases
KW  - Land use planning
KW  - Pollutants
KW  - Public transit
KW  - Sustainable development
KW  - Transit oriented development
KW  - Transportation planning
UR  - https://trid.trb.org/view/901960
ER  - 

TY  - CONF
AN  - 01142129
AU  - Xiao, Wu-Qun
AU  - Ruan, Bo
AU  - American Society of Civil Engineers
TI  - Optimization Methods for Design of the Stabilizing Piles in Landslide Treatment
SN  - 9780784410493
PY  - 2009
SP  - pp 174-183
AB  - In this paper, the authors have studied the optimization of design schemes of the stabilizing piles and the detailed structure of the selected pile in middle-large landslide treatment. Using multi-objectives decision making fuzzy analysis and analytical hierarchy process (AHP), the optimized design scheme of the stabilizing piles, which is of the multiple attribute and fuzzy property, is done. Through the selection of decision variables, objective function, constraint condition (i.e. strength, size, reinforcement etc.) and optimization algorithm, the detailed structure of the selected stabilizing piles can be optimized to minimize the cost of construction. By the software, it is easy to solve this minimized value of nonlinear constraint multi-function. A case analysis proves that there is lower cost of construction by optimization of both schemes of stabilizing piles and the detailed structure of the selected pile in landslide treatment.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Analytic hierarchy process
KW  - Design
KW  - Fuzzy systems
KW  - Geotechnical engineering
KW  - Landslides
KW  - Optimization
KW  - Piles (Supports)
KW  - Slope stability
UR  - https://trid.trb.org/view/902429
ER  - 

TY  - CONF
AN  - 01142127
AU  - Gao, Ying
AU  - Huang, Xiaoming
AU  - Qi, Zhaohui
AU  - Zhang, Jiupeng
AU  - American Society of Civil Engineers
TI  - Characteristics and Prediction of Permanent Deformation in HMA
SN  - 9780784410479
PY  - 2009
SP  - pp 136-142
AB  - Permanent deformation (rutting) in the asphalt pavement is one of the main reasons for pavement damage. The focus of this paper is to study the factors affecting the permanent deformation by tri-axial creep test and the permanent deformation predicting of asphalt pavement. Four popular asphalt mixtures, AC13F, AC13C, AC16 and AC20 were chosen to do the repeated load tri-axial creep test under different voids, asphalt contents, different temperature and load levels. Based on the test result, it was concluded the Flow Number (Fn) of repeated load tri-axial creep test can distinguish the rutting resistance ability of different Hot Mixed Asphalt (HMA) mixtures. Temperature and Load levels have great influence on Fn of HMA as they do for asphalt pavement. The formula used for prediction of pavement permanent deformation was gotten based on the curve between the permanent deformation and loading number under different load and temperature levels. The formula was then calibrated by ALF test data.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt mixtures
KW  - Creep tests
KW  - Deformation
KW  - Hot mix asphalt
KW  - Pavement distress
KW  - Pavement performance
KW  - Ruts (Pavements)
UR  - https://trid.trb.org/view/902154
ER  - 

TY  - CONF
AN  - 01142123
AU  - Yu, Ze-Hong
AU  - Wei, Hong-Wei
AU  - Zhang, Jian-Hua
AU  - American Society of Civil Engineers
TI  - Bearing Capacity Analysis of Beam Foundation on Weak Soil Layer: Non-Linear Finite Element versus Loading Tests
SN  - 9780784410493
PY  - 2009
SP  - pp 158-165
AB  - Considering the interfacial contact between beam and foundation, as well as the weak layer and adjacent soil, the nonlinear finite element model of beam-foundation-underlying weak layer system was proposed and the foundation bearing capacity on weak soil layer was analyzed in the paper. Compared with standardized methods and static load test results, the proposed method was feasible and more reasonable to evaluate the bearing capacity of beam foundation on weak soil layer. According to the calculation results the corresponding ground treatment was proposed, and saved more than 2,000 million Yuan in Tai-Zhong-Yin railway project in China.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Beams
KW  - Bearing capacity
KW  - China
KW  - Finite element method
KW  - Foundations
KW  - Geotechnical engineering
KW  - Load tests
KW  - Railroad tracks
KW  - Soil layers
UR  - https://trid.trb.org/view/902359
ER  - 

TY  - CONF
AN  - 01142120
AU  - American Society of Civil Engineers
TI  - Slope Stability, Retaining Walls, and Foundations: Selected Papers From the 2009 GeoHunan International Conference
SN  - 9780784410493
PY  - 2009
SP  - 252p
AB  - This Geotechnical Special Publication contains 35 papers that were presented at the GeoHunan International Conference, Challenges and Recent Advances in Pavement Technologies and Transportation Geotechnics, held in Changsha, Hunan, China, from August 3 to 6, 2009. This proceedings examines topics such as: (1) Soil Stabilization; (2) Dynamic Behavior of Soils and Foundations; (3) Earth Retaining Walls; and (4) Slope Stability. This publication will be valuable to geotechnical engineering professors and students, as well as geotechnical engineers and professionals.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - China
KW  - Deformation
KW  - Dynamic behavior
KW  - Dynamic loads
KW  - Earth pressure
KW  - Earthquakes
KW  - Embankments
KW  - Foundations
KW  - Geotechnical engineering
KW  - Landslides
KW  - Retaining walls
KW  - Slope failure
KW  - Slope stability
KW  - Soil stabilization
UR  - https://trid.trb.org/view/902133
ER  - 

TY  - CONF
AN  - 01142119
AU  - Yang, Jian-jun
AU  - Zheng, Jian-Long
AU  - American Society of Civil Engineers
TI  - Project Design and Mechanical Analysis for Sutong Bridge Deck Pavement
SN  - 9780784410486
PY  - 2009
SP  - pp 45-51
AB  - The project design of epoxy asphalt concrete surfacing on the steel deck of Sutong Bridge is commended. The response of the layered pavement system under wheel load was analyzed by the Finite Element Method, and the key mechanics parameters of easily damaged layers were calculated and portrayed. The research showed that the notable draught stress in the surfacing layer and high shear stress in the binder layer are the cause of the deck pavement’s poor performance. Reasonable structure and material design is the crucial factor for project success. The results can be a reference for paving design of steel decks.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt concrete
KW  - Bridge decks
KW  - Finite element method
KW  - Mechanical properties
KW  - Pavement layers
KW  - Pavement performance
KW  - Steel structures
UR  - https://trid.trb.org/view/902338
ER  - 

TY  - CONF
AN  - 01142118
AU  - Ryu, Sung Woo
AU  - Park, Min-Young
AU  - Nam, Jung-Hee
AU  - An, ZuOg
AU  - Bae, Jong-Oh
AU  - Cho, Yoon-Ho
AU  - Lee, Seung Woo
AU  - American Society of Civil Engineers
TI  - Initial Behavior of Thin-Bonded Continuously Reinforced Concrete Overlay (CRCO) on Aged Jointed Concrete Pavement
SN  - 9780784410486
PY  - 2009
SP  - pp 101-106
AB  - A thin-bonded CRCO (Continuously Reinforced Concrete Overlay) on a JCO (Jointed Concrete Overlay) was constructed at Seo Hae Ahn Express Highway in Korea. This project includes two experimental sections: 1 ) a JCO with saw-cut joints over existing transverse joints, and 2) a CRCO, which employs transverse and longitudinal steel reinforcing rods, that is placed on top of an existing JCO. After milling 5 cm off the top of the JCO, an overlay thickness of 10 cm remains. Several VWSGs (Vibrating Wire Strain Gauges) were installed to evaluate curling, delamination behavior, and crack propagation of the thin-bonded CRCO. This paper describes the early behavior of this overlay and compares the current and new rehabilitation methods available in Korea.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Concrete overlays
KW  - Continuously reinforced concrete pavements
KW  - Pavement distress
KW  - Pavement performance
KW  - Reinforced concrete
KW  - Sawed joints
KW  - South Korea
KW  - Strain gages
KW  - Transverse joints
UR  - https://trid.trb.org/view/902290
ER  - 

TY  - CONF
AN  - 01142116
AU  - Yi, Yaolin
AU  - Liu, Songyu
AU  - Zhang, Dingwen
AU  - Zhu, Zhiduo
AU  - American Society of Civil Engineers
TI  - Experimental Study on T-Shaped Soil-Cement Deep Mixing Column Composite Foundation
SN  - 9780784410493
PY  - 2009
SP  - pp 1-7
AB  - Soil-cement deep mixing method is widely used in soft ground improvement for highway engineering application in China. However, there are some disadvantages of the conventional soil-cement deep mixing method in China, such as insufficient mixing, grouting spill and decrease of strength along column depth. In addition, small column spacing and cushion or geosynthestic reinforcement are often required, resulting in high cost. In order to conquer these disadvantages, a new deep mixing method named T-shaped deep mixing method is developed. The mechanism, construction issues, and pilot project monitoring results of T-shaped deep mixing column foundation are presented in the paper. The results indicate that the T-shaped deep mixing method makes the deep mixing much more reliable and economical.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Cement
KW  - China
KW  - Deep soil mixing
KW  - Experiments
KW  - Foundations
KW  - Geotechnical engineering
KW  - Soil cement
UR  - https://trid.trb.org/view/902372
ER  - 

TY  - CONF
AN  - 01142115
AU  - Cui, Xin-zhuang
AU  - Cao, Wei-Dong
AU  - Liu, Shu-Tang
AU  - Dong, Lin-lin
AU  - American Society of Civil Engineers
TI  - On Dynamic Pore Pressure in Moisture Damage of Asphalt Pavement
SN  - 9780784410479
PY  - 2009
SP  - pp 122-128
AB  - For studying the accelerating role of dynamic pressure in moisture damage of asphalt pavement, based on fast Lagrangian finite difference method and Biot dynamic consolidation theory, fluid-solid coupling analysis was done considering asphalt mixtures as porous medium. Results revealed that development and dissipation of the dynamic pore pressure are coinstantaneous and this makes the positive and negative dynamic pore pressure and seepage force both alternate. The pumping phenomenon of saturated asphalt pavement under moving vehicle load was proved. The dynamic pore pressure increases with vehicle velocity. Effective stress and deflection of pavement all decrease due to the dynamic pore pressure. The maximum dynamic pore pressure occurs at the bottom of the surface course. So it’s suggested that a drain course should be set up to change the drained condition from single-sided drain to both-sided drain, and thus the moisture damage can be limited effectively.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt pavements
KW  - Live loads
KW  - Moisture damage
KW  - Pore pressure
KW  - Surface course (Pavements)
UR  - https://trid.trb.org/view/902170
ER  - 

TY  - CONF
AN  - 01142114
AU  - Guo, Lei
AU  - Fu, Helin
AU  - Shen, Hong
AU  - American Society of Civil Engineers
TI  - Study of Mouzhudong Landslide Mechanism
SN  - 9780784410493
PY  - 2009
SP  - pp 202-207
AB  - Mouzhudong landslide lies in Guixin Express, and it was a big landslide which occurred previously. The main part of the landslide is sequence shale with lime stone. After being repaired for several times, there are still new cracks existing in the potential landslide. In this paper, through the stability analysis to the right landslide of Maozhoudong with Limit Balance Method, current slope stability also can be disclosed. The possible slide faces include the arc face slide from the bottom of retaining wall and the polyline face slide from the top of poles along mudstone.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - China
KW  - Embankments and retaining walls
KW  - Geotechnical engineering
KW  - Landslides
KW  - Limestone
KW  - Mudstones
KW  - Shale
KW  - Slope stability
UR  - https://trid.trb.org/view/902439
ER  - 

TY  - CONF
AN  - 01142113
AU  - Pan, Youqiang
AU  - Guo, Zhongyin
AU  - Ling, Chen
AU  - American Society of Civil Engineers
TI  - Study on the Interface Treatment of Concrete Deck Pavement
SN  - 9780784410486
PY  - 2009
SP  - pp 52-60
AB  - Today, serious deterioration has occurred on concrete deck pavement in China. One reason for the problem is the interface slippage between the concrete deck and the pavement. An efficient interface treatment can solve the problem. The interface treatment contains two aspects: the concrete deck treatment and the adhesion layer. Concrete deck treatment can change the physical form of the concrete deck and is more reliable in improving the shear performance of the concrete deck pavement. This paper summarizes and presents a comparison through physical form analysis and indoor tests of three kinds of concrete deck treatment: manual work treatment, milling treatment and sandblast treatment. The test results show that milling treatment can improve shear performance more than sandblast treatment. This paper suggests a more reliable way to improve the shear performance of concrete deck pavement.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bridge decks
KW  - China
KW  - Concrete
KW  - Concrete pavements
KW  - Deterioration
KW  - Pavement distress
KW  - Pavement performance
KW  - Surface treating
UR  - https://trid.trb.org/view/902348
ER  - 

TY  - CONF
AN  - 01142110
AU  - Zhang, Wen-xian
AU  - Luo, Bing
AU  - Jin, Shu-yang
AU  - American Society of Civil Engineers
TI  - Mechanic Analysis of Bridge Reinforcement with Mesh and Steel Fiber Reinforced Concrete and Experimental Construction Technology
SN  - 9780784410486
PY  - 2009
SP  - pp 68-75
AB  - The context of this paper is the research on reinforcement of Dongguan Northern Bridge of the Guangzhou-Shenzhen highway in China by using mesh and steel fiber reinforced concrete (SFRC). Numerical program MIDAS has been utilized to model the mechanical response of the bridge. The interaction between the new and old concrete bridge structures is simulated. Mechanic analysis has been performed on the most unfavorable load positions. The overloads and shrinkage creep of concrete are considered. The anchor bar’s distance and the optimal thickness of the concrete bridge deck have been discussed. Finally, a real life application of the construction technology for treating the flaws of the bridge deck paving overlay with mesh and steel fiber reinforced concrete is given.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bridge decks
KW  - Bridges
KW  - China
KW  - Concrete construction
KW  - Fiber reinforced materials
KW  - Mechanical properties
KW  - Reinforced concrete
KW  - Reinforcement (Engineering)
UR  - https://trid.trb.org/view/902326
ER  - 

TY  - CONF
AN  - 01142109
AU  - American Society of Civil Engineers
TI  - Performance Modeling and Evaluation of Pavement Systems and Materials: Selected Papers From the 2009 GeoHunan International Conference
SN  - 9780784410479
PY  - 2009
SP  - 173p
AB  - This Geotechnical Special Publication contains 24 papers that were presented at the GeoHunan International Conference, Challenges and Recent Advances in Pavement Technologies and Transportation Geotechnics, held in Changsha, Hunan, China, from August 3 to 6, 2009. The areas of research that are examined in this proceedings include: (1) Hot-Mix Asphalt Constitutive Modeling; (2) Pavement Responses under Dynamic Loading; (3) Moisture Damage and Permanent Deformation in Asphalt Concrete; (4) Asphalt and Portland Cement Concrete Evaluation; and (5) Pavement Performance Assessment. Infrastructure engineers working within transportation and geotechnical facilities with special interest in pavement constitutive modeling, performance, and evaluation will find this publication valuable.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Geotechnical engineering
KW  - Pavement maintenance
KW  - Pavement performance
KW  - Paving materials
KW  - Rehabilitation (Maintenance)
UR  - https://trid.trb.org/view/902126
ER  - 

TY  - CONF
AN  - 01142107
AU  - Jonsthovel, B
AU  - Liu, X
AU  - Scarpas, A
AU  - Vuik, C
AU  - American Society of Civil Engineers
TI  - Parallel Direct Solver for Linear Systems Resulting from Constitutive Modeling of Pavement
SN  - 9780784410479
PY  - 2009
SP  - pp 90-95
AB  - Reliable and realistic computer simulations of pavement behavior are important for improving the design process of pavement materials. Most simulations involve 3D modeling and therefore large finite element meshes. Hence, the systems that result from discretization involve many degrees of freedom and are difficult to solve. Constitutive modeling is an expensive process when mesh sizes increase. The introduction of a parallel direct solver reduces both computation time and the number of iterations to solve the system and yielding more realistic simulations.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Constitutive models
KW  - Degrees of freedom
KW  - Finite element method
KW  - Pavement design
KW  - Pavement performance
KW  - Simulation
UR  - https://trid.trb.org/view/902171
ER  - 

TY  - CONF
AN  - 01142106
AU  - Wu, Jason Y
AU  - Zhang, Zhi-Ming
AU  - American Society of Civil Engineers
TI  - Evaluations of Pullout Resistance of Grouted Soil Nails
SN  - 9780784410493
PY  - 2009
SP  - pp 108-114
AB  - This study conducted laboratory and field pullout tests on grouted soil nails in sand to examine the interface shear resistance between nails and soil during pullout. The results indicated that the pullout strength found in the laboratory correlated reasonably well with that observed in the field. Such a finding makes the predication of field pullout resistance possible, based on the laboratory protocols developed in this study.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Geotechnical engineering
KW  - Grouting
KW  - Laboratory tests
KW  - Pullout tests
KW  - Shear strength
KW  - Soil nailing
KW  - Soil stabilization
UR  - https://trid.trb.org/view/902370
ER  - 

TY  - CONF
AN  - 01142101
AU  - Mirdamadi, Alireza
AU  - Shamsabadi, Shariar Sh
AU  - Kashi, M G
AU  - Nemati, M
AU  - Shekarchizadeh, M
AU  - American Society of Civil Engineers
TI  - Geotechnical Properties of Controlled Low Strength Materials (CLSM) Using Waste Electric Arc Furnace Dust (EAFD)
SN  - 9780784410493
PY  - 2009
SP  - pp 80-86
AB  - Controlled low-strength material (CLSM) is a self-compacted cementitious material used primarily as a backfill in place of compacted soil. It is also known as a flowable fill which is usually a mixture of fine aggregates, small amount of cement, and water. Usage of by-product materials is common as fine aggregates in flowable fill materials. Electric Arc Furnace Dust (EAFD) is a solid waste generated in the collection of particulate material during steelmaking process in electric arc furnace. In this study EAFD was tested for the possibility of producing CLSM with large proportion of this waste. The main properties measured in this research include EAFD chemical properties and EAFD flowable fill geotechnical properties (unconfined compressive strength, California Bearing Ratio (CBR), flowability, and setting time) for different mix proportion. Results indicate that with a good mix design it is possible to produce a CLSM with acceptable mechanical properties to meet design requirements.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Backfilling
KW  - Dust
KW  - Electric arc furnace dust
KW  - Flowable fill
KW  - Mechanical properties
KW  - Soil compaction
KW  - Solid wastes
UR  - https://trid.trb.org/view/902374
ER  - 

TY  - CONF
AN  - 01142099
AU  - Dong, Zejiao
AU  - Cheng, Xiaoliang
AU  - Zheng, Hao
AU  - Tan, Yiqiu
AU  - American Society of Civil Engineers
TI  - Similarity Analysis of Rutting Test for Asphalt Pavement Based on Similarity Theory
SN  - 9780784410479
PY  - 2009
SP  - pp 68-73
AB  - Generally, the performance of asphalt pavement at high temperature is evaluated by rutting test. However, few researches focusing on the mechanical similarity between the rutting test specimen and the actual asphalt pavement structure has been carried out. As a result, based on Similarity Theory, the mechanical similarity between rutting test specimen and typical asphalt pavement structure through using three-dimensional finite element simulation was analyzed. At first, the similarity parameters were derived based on the Similarity Theory. Then, the loading types, boundary conditions and material parameters of finite element models were listed here. Finally, typical mechanical states in an actual pavement structure and rutting test were compared and analyzed. The result indicates that there are some differences in the distribution of stress and strain field between the two cases due to the different boundary conditions and object sizes studied. However, it can be made up with a proper design to the specimen and loading area in rutting test.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt pavements
KW  - Cores (Specimens)
KW  - Finite element method
KW  - High temperature
KW  - Pavement performance
KW  - Ruts (Pavements)
KW  - Traffic loads
UR  - https://trid.trb.org/view/902274
ER  - 

TY  - CONF
AN  - 01142098
AU  - Wang, Wei
AU  - Zhou, Ai-Zhao
AU  - Ling, Hua
AU  - American Society of Civil Engineers
TI  - Field Tests on Composite Deep-Mixing-Cement Pile Foundation under Expressway Embankment
SN  - 9780784410493
PY  - 2009
SP  - pp 62-67
AB  - Anti-slide behavior of road foundation under embankment is of great importance to embankment stability in expressway engineering. Three kinds of field tests on anti-slide behavior of one expressway soft foundation improved by deep-mixing-cement pile (DMCP) are conducted, which include nature soft foundation test, single-pile foundation test and four-pile foundation test. Stress cells are placed in order to investigate the distributions of vertical stresses along the DMCP shaft during the filed tests. The investigated data show that anti-slide strength of the soft foundation increases greatly after the DMCP improvement. Single—pile foundation test and four-pile foundation test provide similar cohesion forces and friction angles, but they have different types of vertical stress growth process. Change of horizontal force only makes a little difference to vertical stress of DMCP below 6.0 m depth. This study can provide good base for relative design of expressway engineering.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Cement
KW  - Embankments
KW  - Field tests
KW  - Geotechnical engineering
KW  - Highway engineering
KW  - Pile foundations
KW  - Slope stability
UR  - https://trid.trb.org/view/902373
ER  - 

TY  - CONF
AN  - 01142096
AU  - Qian, Guoping
AU  - Zheng, Jianlong
AU  - Zhang, Honggang
AU  - American Society of Civil Engineers
TI  - Dynamic Responses Model of Asphalt Pavement under Complex Vehicle Loads
SN  - 9780784410479
PY  - 2009
SP  - pp 96-102
AB  - The overweight vehicle create complex moving vehicle loads described as dynamic, three-dimension non-uniformly distributed contact stresses between tire and pavement surface. But existing calculation models and methods for structure mechanics of pavement cannot analyze the mechanical response of pavement under complex vehicle loads. Based on the theory of three-dimension elastic dynamics, the above problems were solved by using multidimensional Fourier Transformation technique after transforming moving coordinates, and general solution for multilayer elastic system under complex vehicular load was derived in this paper. Then, pivotal issues were analyzed for numerical methods implementation. Lastly, the calculation results were contrasted with results of spot test, which showed that the mechanical responses model and its numerical methods implementation are reasonable and correct.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt pavements
KW  - Dynamic response
KW  - Live loads
KW  - Load factor
KW  - Rolling contact
KW  - Structural analysis
KW  - Traffic loads
UR  - https://trid.trb.org/view/902160
ER  - 

TY  - CONF
AN  - 01142095
AU  - Songchitruksa, Praprut
AU  - Boriboonsomsin, Kanok
AU  - Barth, M
AU  - American Society of Civil Engineers
TI  - Impact of Rising Fuel Prices on Prevailing Traffic Speed on Freeway in Houston, Texas
SN  - 9780784410592
PY  - 2009
SP  - pp 31-40
AB  - This study investigates the impact of the 50% rise of gasoline prices over a nine-month period (October 2007 to June 2008) on the free-flow traffic speeds on freeways in Houston, Texas. The impact was estimated using a multiple linear regression technique with controls for time of day, day of week, and season. Three separate models were developed for the 15th, 50th, and 85th percentile traffic speeds, which represent motorists whose value of time is low, medium, and high. These groups of motorists decreased their free-flow speeds from the baseline speed by 5.5%, 3.9%, and 3.1%, respectively, when the gasoline price rose by $2.00 per gallon.
U1  - 2009 Transportation, Land Use, Planning, and Air Quality ConferenceAmerican Society of Civil EngineersFederal Highway AdministrationTransportation Research BoardCenter for Transportation Research and EducationUniversity of North Carolina, CharlotteDenver,Colorado,United States StartDate:20090725 EndDate:20090729 Sponsors:American Society of Civil Engineers, Federal Highway Administration, Transportation Research Board, Center for Transportation Research and Education, University of North Carolina, Charlotte
KW  - 15th percentile speed
KW  - 85th percentile speed
KW  - Freeway operations
KW  - Fuel costs
KW  - Houston (Texas)
KW  - Linear regression analysis
KW  - Traffic flow
KW  - Traffic models
KW  - Traffic speed
KW  - Value of time
UR  - https://trid.trb.org/view/902072
ER  - 

TY  - CONF
AN  - 01142092
AU  - Li, Zhen-Yu
AU  - Wang, Yong-He
AU  - Yang, Guo-Lin
AU  - American Society of Civil Engineers
TI  - Bayesian Inference of Empirical Coefficient in Foundation Settlement
SN  - 9780784410493
PY  - 2009
SP  - pp 22-29
AB  - Baysian theory, a new approach is proposed to determine the empirical coefficient in calculating soil settlement. The choice of prior distribution and the inference of posterior distribution are two important components of this method. According to previous knowledge available, the empirical coefficient determined by compression module in the interval [0.2–1.4], prior distribution is assessed uniform distribution in this interval. Posterior density function is developed in the condition of prior distribution combined with observed samples information based on bayes principle. Taking four locations in a passenger dedicated line for example, the results show that the posterior distribution of the empirical coefficient obeys Guass distribution parameter μ and σ. The value of μ is decreased gradually with the load on ground increased. In addition, the observed samples information has great influence on the posterior distribution, and the size of samples is larger, the results are more reliable.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bayes' theorem
KW  - Coefficients
KW  - Empirical methods
KW  - Foundations
KW  - Geotechnical engineering
KW  - Settlement (Structures)
UR  - https://trid.trb.org/view/902358
ER  - 

TY  - RPRT
AN  - 01142078
AU  - Andersen, Carl
AU  - Federal Highway Administration
TI  - Seeing in the Dark: Improving Understanding of Driver Visibility Requirements at Night
PY  - 2009
SP  - 2p
AB  - What visual cues aid drivers the most as they drive at night? Advancing knowledge and understanding of how drivers acquire and act on visual information while driving at night is the goal of an Exploratory Advanced Research  Program project, and a discussion of this issue is also presented in this brief paper.
KW  - Drivers
KW  - Highway safety
KW  - Night visibility
KW  - Night vision
KW  - Nighttime driving
UR  - http://www.fhwa.dot.gov/advancedresearch/pubs/seedarkear.pdf
UR  - http://ntl.bts.gov/lib/30000/30800/30891/FHWA-HRT-09-024.pdf
UR  - https://trid.trb.org/view/902323
ER  - 

TY  - RPRT
AN  - 01142040
AU  - Ferlis, Bob
AU  - Federal Highway Administration
TI  - Increasing Highway Throughput: Communications and Control Technologies to Improve Traffic Flow
PY  - 2009
SP  - 2p
AB  - How can the new capabilities of intelligent vehicles and highway infrastructure be used to reduce congestion and effectively increase highway capacity? This question is the focus of and Exploratory Advanced Research Program project, and it is explored in this brief paper.
KW  - Communication and control
KW  - Congestion mitigation
KW  - Highway capacity
KW  - Intelligent transportation systems
KW  - Traffic congestion
KW  - Traffic flow
UR  - http://www.fhwa.dot.gov/advancedresearch/pubs/highway.pdf
UR  - http://ntl.bts.gov/lib/30000/30800/30890/FHWA-HRT-09-037.pdf
UR  - https://trid.trb.org/view/902321
ER  - 

TY  - CONF
AN  - 01141017
AU  - Yin, Yong
AU  - Yu, Xiao-jun
AU  - American Society of Civil Engineers
TI  - Research on Applying Glass Fiber Cement Soil to Strengthen Soft Soil Subgrade
SN  - 9780784410448
PY  - 2009
SP  - pp 7-13
AB  - Soft soil is widely distributed in the world.  With the increase in construction of highways and railways on soft soil, the treatment of soft soil subgrade is becoming more and more extensive.  Based on the reinforcement effects of glass fiber, the possibility of applying glass fiber to strengthen soft soil subgrade is discussed in this paper.  More than 100 groups of cement soil samples' laboratory testing results are presented and compared.  The analysis of test results indicates that glass fiber mixed in cement soil can improve the strength and deformation characteristic of cement soil in a certain degree.  It could also be used as a possible replacement of soft soil subgrade.  The findings are a new contribution to the soft soil subgrade treatment techniques.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Cement
KW  - China
KW  - Glass fibers
KW  - Soft soils
KW  - Soil stabilization
KW  - Subgrade (Pavements)
UR  - https://trid.trb.org/view/900201
ER  - 

TY  - CONF
AN  - 01141016
AU  - Wang, Zhaoyu
AU  - Mei, Guoxiong
AU  - Cai, Guojun
AU  - Yu, Xinbao
AU  - American Society of Civil Engineers
TI  - Dynamic Finite Element Analysis of Micropile Foundation in Subgrade
SN  - 9780784410448
PY  - 2009
SP  - pp 139-144
AB  - The effect of micropiles on soil reinforcement under static and dynamic loadings was studied.  Embankment on untreated soil and treated soil by micropiles were modeled using the finite element code PLAXIS.  The displacement caused by embankment static loading and acceleration of the embankment caused by seismic loading were calculated and compared.  It was found that micropiles treated soil can greatly reduce the settlement of the embankment and mitigate seismic response of the embankment.  The results of this study provide valuable information about the design and application of micropiles.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Finite element method
KW  - Micropiles
KW  - Pile foundations
KW  - Soil stabilization
KW  - Subgrade (Pavements)
UR  - https://trid.trb.org/view/900373
ER  - 

TY  - CONF
AN  - 01141015
AU  - Yang, X L
AU  - Huang, F
AU  - Zhao, L H
AU  - Wei, H W
AU  - American Society of Civil Engineers
TI  - Failure Mechanisms and Corresponding Stability Charts of Homogenous Rock Slopes
SN  - 9780784410448
PY  - 2009
SP  - pp 204-210
AB  - Failure mechanisms of homogenous rock slopes were investigated within the upper bound theorem of limit analysis.  In rich water zone, the effective stress analysis of saturated slopes is considered.  The corresponding charts for different types of rocks are presented for practical use.  From the results, it is found that the stability factors increase with the increasing rock strength, and that the nonlinear parameter and rock types have important effects on failure mechanisms.  According to the results, new equations for determining the stability factors are proposed.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Rock slopes
KW  - Rocks by properties
KW  - Slope failure
KW  - Slope stability
UR  - https://trid.trb.org/view/900934
ER  - 

TY  - CONF
AN  - 01141014
AU  - Mei, Ling
AU  - Mei, Guoxiong
AU  - Zai, Jinmin
AU  - American Society of Civil Engineers
TI  - Numerical Analysis of Critical Bearing Capacity of Subsoil with K0 Unequal to 1
SN  - 9780784410448
PY  - 2009
SP  - pp 42-48
AB  - Traditionally, the formulas of critical edge pressure and critical load are developed by assuming coefficient of earth pressure at rest equal to 1.  It means that the geostatic stress is treated as hydrostatic stress.  This assumption leads to an increase in lateral load of subsoil and results in a higher bearing capacity of subsoil.  In the paper, a MATLAB program is used to find the numerical solution of bearing capacity of soil for coefficient of earth pressure at rest not equal to 1.  The proposed method overcomes some shortcomings of the methods available in the literature for coefficient of earth pressure at rest not equal to 1.  The influence of shear strength parameters of soil on the critical load is investigated.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bearing capacity
KW  - Coefficients
KW  - Critical loads
KW  - Earth pressure
KW  - Numerical analysis
KW  - Shear strength
KW  - Soils by properties
KW  - Subsoil
UR  - https://trid.trb.org/view/900264
ER  - 

TY  - CONF
AN  - 01141013
AU  - He, Yue Guang
AU  - Yang, Lei
AU  - Liu, Li Lin
AU  - American Society of Civil Engineers
TI  - Research about the Regularization of Ground Surface Movement and Deformation Caused by Mountain Tunnel Excavation
SN  - 9780784410448
PY  - 2009
SP  - pp 197-203
AB  - Through analyzing the process of tunnel construction using the finite element method, the authors conclude the regularization of ground surface movement, and take a contrastive analysis with the analysis result of ground surface movement and deformation by using the stochastic medium theory.  The research shows that stochastic medium theory is adopted to predict the ground surface movement and deformation of crushed surrounding rock tunnel; the value of subsidence on the tunnel axis is maximal, and far away from the axis direction the value of subsidence decreases; the ground surface horizontal displacement on the cross section of mountain tunnel increases with the increase of distance from the central axis of tunnel, the value arrives the maximum at the point of inflection, after that decreases; when the mountain tunnel depth increases, the area of influence of ground surface movement and deformation enlarges and the strength of influence weakens.  The actual ground surface movement of this tunnel by monitoring proves the reliability of this research.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Deformation
KW  - Excavation
KW  - Mountains
KW  - Seismicity
KW  - Soils
KW  - Tunnels
UR  - https://trid.trb.org/view/900854
ER  - 

TY  - CONF
AN  - 01141012
AU  - Chen, Y H
AU  - Wang, X Q
AU  - Cao, D H
AU  - Shen, W G
AU  - American Society of Civil Engineers
TI  - Experimental Study on Soft Ground Improvement by Grouted Gravel Pile
SN  - 9780784410448
PY  - 2009
SP  - pp 165-170
AB  - Based on field tests on the new developed grouted gravel pile, the bearing performance, working mechanism and improvement effect on the adjacent ground were studied.  The variation of pore water pressure, pile-soil stress ratio, ground surface settlement, layered settlement, and lateral displacement of improved zone adjacent to grouted gravel pile were monitored and presented in this paper.  It indicates that the properties of adjacent soil surrounding both pile body and pile toe were improved due to the infiltration and cementation of cement grout, therefore both shaft friction and end bearing resistance were remarkably increased and apparently the ultimate bearing capacity was increased.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bearing capacity
KW  - Gravel
KW  - Piles (Supports)
KW  - Soft soils
KW  - Soil stabilization
UR  - https://trid.trb.org/view/900770
ER  - 

TY  - CONF
AN  - 01141010
AU  - Chen, Y H
AU  - Wang, X Q
AU  - Liu, H L
AU  - American Society of Civil Engineers
TI  - Calculation of Soil Stresses under Various Pile Sectional Configurations
SN  - 9780784410448
PY  - 2009
SP  - pp 159-164
AB  - With development of piling technology, various pile sectional configurations are adopted in the pile industry practice.  The soil stresses induced by the piles of various sectional configurations are significantly different.  In this paper, the solutions for the induced soil stresses were proposed for Y-shaped pile, closed- and open-ended pipe piles, triangular-shaped pile, and square pile.  The calculation of soil stresses is based on the Mindlin stress solution and Geddes methodology for derivation of soil stresses.  It is assumed that the pile end bearing and shaft resistance are uniformly distributed across the pile tip area and shaft perimeter, respectively.  The numerical software Mathematica (Nintegrate) was used to provide integrations to the derived theoretical solutions.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Mathematical methods
KW  - Piles (Supports)
KW  - Soil stabilization
KW  - Soils by properties
KW  - Stresses
UR  - https://trid.trb.org/view/900769
ER  - 

TY  - CONF
AN  - 01141008
AU  - Tan, Yong
AU  - Lu, Ye
AU  - Peng, Fangle
AU  - American Society of Civil Engineers
TI  - Investigation of Ground Improvement Effects: Two Case Studies
SN  - 9780784410448
PY  - 2009
SP  - pp 62-69
AB  - This paper investigated the densification effects of deep dynamic compaction (DDC) and vibratory compaction on loose saturated sands, which were based on two well-documented case histories.  This investigation was carried out by examining pre- and post-compaction cone penetration testing (CPT) results.  The CPT results indicated that under the same design earthquake excitation, the sands treated by DDC were densified to the level of resisting potential liquefaction, while, the sands were still liquefiable after vibratory compaction.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Case studies
KW  - Sand
KW  - Soil compaction
KW  - Soil densification
KW  - Soil stabilization
UR  - https://trid.trb.org/view/900274
ER  - 

TY  - CONF
AN  - 01141007
AU  - Zhang, Chun-shun
AU  - Wang, Yong-he
AU  - Xiao, Hong-bin
AU  - Fan, Zhen-hui
AU  - American Society of Civil Engineers
TI  - Theoretical Analysis and Numerical Simulation of Load-Settlement Relationship of Single Pile
SN  - 9780784410448
PY  - 2009
SP  - pp 126-132
AB  - An analytical model is proposed to evaluate the pile skin friction at the pile-soil interface and analyze P-s curve of single pile.  The model is based on the exponential transfer function technique and allows back-analysis to be carried out easily.  The calculated skin friction results are in good agreement with the measured ones and the accuracy of the proposed method has been verified by an example in Xiao et al.'s (2002) work.  Then the transfer model is implemented into differential equation of pile-soil interaction, and after being iterated by computer simulation, the calculated P-s curve is in very good agreement with the results of Xiao et al. (2002) and Carrubba (1997).  Parameters are initially obtained from lab experiment and subsequently modified by fitting the Carrubba's (1997) pile head displacements to computer simulation.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Piles (Supports)
KW  - Settlement (Structures)
KW  - Simulation
KW  - Skin friction
KW  - Soil-pile interaction
UR  - https://trid.trb.org/view/900370
ER  - 

TY  - CONF
AN  - 01141003
AU  - Wang, Lichuan
AU  - Hu, Haibo
AU  - Wang, Shibin
AU  - Jia, Ruihua
AU  - American Society of Civil Engineers
TI  - Study on Construction Methods for Tunnels of Large Cross-Section Excavated in Weak Rocks
SN  - 9780784410448
PY  - 2009
SP  - pp 225-231
AB  - The double side drift method, CRD and CD method are widely adopted for super large cross-section excavation for tunnel in weak rock in China.  Further, it is shown good adaptability because of the extensive application in highway, railway, especially in urban underground facilities.  However, there are also some problems in work efficiency, structure safety and engineering management and so on.  It is necessary to make optimization of construction methods under these conditions.  In this paper these shortcomings for double side drift, CRD and CD methods are detailed.  The work efficiency, load conversion mechanism and the influence on tunnel structure, and construction management are discussed.  Then suggestions for tunnel excavation determination in such conditions are put forward.  It is shown that if auxiliary measures are adopted first, partial excavation could be abandoned.  Even full-face excavation may be feasible.  The principle proposed in this paper has been used in practice, which is proved once more for tunnel excavation in soft and weak surrounding ground.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Construction management
KW  - Cross sections
KW  - Excavation
KW  - Rocks
KW  - Tunnels
UR  - https://trid.trb.org/view/900938
ER  - 

TY  - CONF
AN  - 01140999
AU  - Liu, Ming
AU  - Yuan, Hang
AU  - Wang, Wei
AU  - American Society of Civil Engineers
TI  - Research and Practice of Roadbed and Pavement Disease Treatment with Cement-Emulsified Bitumen Composite Grouting Material
SN  - 9780784410448
PY  - 2009
SP  - pp 108-113
AB  - Through the analysis of the common roadbed and pavement diseases such as cavity beneath slab and pumping, and their current treatment situation, the authors proposed the idea of improving and resuming the loading capacity and waterproof performance of highway through intercalating a waterproof bonding layer between base and slab.  The authors have developed a new composite grouting material composed of an environmentally friendly powdery inorganic component and an emulsified bitumen component to solve the technical issue of the pressure grouting of emulsified bitumen.  Their practices show that the material can combine the excellent waterproofing behavior of bitumen and the high-strength of cement and adjust its rigidity to be suitable for different road structures.  Through the grouting treatment by the new material, the stress state of roadbed and slab can be significantly improved and the carrying capacity can be resumed at reasonable cost-performance ratio.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bearing capacity
KW  - Cement
KW  - Composite materials
KW  - Emulsified asphalt
KW  - Grouting
KW  - Pavements
KW  - Waterproofing
UR  - https://trid.trb.org/view/900365
ER  - 

TY  - CONF
AN  - 01140998
AU  - Wu, Congshi
AU  - Ding, Zude
AU  - American Society of Civil Engineers
TI  - Effect of Mechanics and Optimum Process in Excavating Multi-Arch Tunnel
SN  - 9780784410448
PY  - 2009
SP  - pp 281-286
AB  - Based on the Chenjiaqiao tunnel project, the construction process of tunnel under different surrounding rock conditions and with various construction methods is analyzed with MIDAS program.  The mechanical behavior under complex process of construction and the optimization of the construction process of multi-arch tunnel are studied by the analysis of the monitoring measured data and the numerical analysis results.  The main contents of the research contain: The 3D elastoplastic model of multi-arch tunnel is set up, which contains Grade III, IV and V surrounding rock.  The stress of the surrounding rock and the supporting structure at typical excavation stage under above three excavation methods are simulated and analyzed.  The monitoring data is analyzed and compared with the simulated data.  The reasonable distance between the working faces of the right and left tunnel is obtained.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - China
KW  - Excavation
KW  - Mechanics
KW  - Optimization
KW  - Rocks
KW  - Tunneling
KW  - Tunnels
UR  - https://trid.trb.org/view/900957
ER  - 

TY  - CONF
AN  - 01140997
AU  - Yan, Kezhen
AU  - Wu, Luocheng
AU  - American Society of Civil Engineers
TI  - Swelling Behavior of Compacted Expansive Soils
SN  - 9780784410448
PY  - 2009
SP  - pp 1-6
AB  - In this paper, swell pressures of the compacted expansive soil of Guangxi Province are investigated by a series of swelling laboratory tests with different initial moisture contents and dry density.  The relationships of swell pressure with initial moisture content and dry density are established.  The method to calculate the expansive characteristics is obtained when the water contents and total stress levels are changed.  These relationships can be used in practical expansive soils engineering.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - China
KW  - Soil compaction
KW  - Swelling
KW  - Swelling soils
UR  - https://trid.trb.org/view/900144
ER  - 

TY  - CONF
AN  - 01140996
AU  - Zou, Xin-Jun
AU  - Zhao, Ming-Hua
AU  - American Society of Civil Engineers
TI  - Theoretical and Experimental Study on the Vertical Bearing Behavior of Super-Long Filling Piles in Soft Soil Area
SN  - 9780784410448
PY  - 2009
SP  - pp 145-151
AB  - Based on the vertical static load test results on a test pile, located in the soft soil, the load transfer mechanism and bearing behavior of super-long filling piles is first discussed.  Then, a method of predicting the axial bearing capacity of super-long piles by the pile top settlement is advised.  By introducing the linear elastic-fully plastic model and tri-broken-line model to fit the development of shaft resistance and tip resistance respectively, analytical solutions of axial load capacity are derived under elastic stage of the subsoil.  Finally, the present method is applied to analyze the data from the test pile, from which good agreement between the predicted and measured pile top load-settlement curves is found.  The results also show that buckling stability analysis and deformation checks are necessary for super-long filling piles, and the axial bearing capacity of super-long piles should be controlled by the allowable settlement on the pile top.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bearing capacity
KW  - Earthwork
KW  - Load transfer
KW  - Piles (Supports)
KW  - Soft soils
UR  - https://trid.trb.org/view/900766
ER  - 

TY  - CONF
AN  - 01140994
AU  - Gamache, Ronald W
AU  - Kianirad, Ehsan
AU  - Alshawabkeh, Akram N
AU  - American Society of Civil Engineers
TI  - An Automatic Portable Near Surface Soil Characterization System
SN  - 9780784410448
PY  - 2009
SP  - pp 89-94
AB  - Soil strength, type, and moisture content are needed for site characterization applications and to assess the load carrying capacity of soil in construction control applications.  Currently, no portable, automatic, easy-to-use field methods exist to measure the required soil parameters.  In this paper, the authors describe a new instrument that integrates and extends two proven technologies, the cone penetrometer (CPT) and dynamic cone penetrometer (DCP).  A portable Rapid Soil Characterization System is under development to perform near surface assessments to determine trafficability for heavy vehicles and aircraft.  In the construction control context, the new device has the potential to eliminate errors in the measurement of soil strength due to soil type and moisture effects.  A fully automatic prototype system has undergone limited field demonstration at the USACE facility in Vicksburg, MS.  Preliminary laboratory and field test results indicate that the required soil geotechnical parameters can be extracted from dynamic penetration data, providing a new surface instrument that can provide accurate soil strength assessment to a depth of one meter.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Cone penetrometers
KW  - Dynamic penetration test
KW  - Soil stabilization
KW  - Soil types
KW  - Soil water
UR  - https://trid.trb.org/view/900362
ER  - 

TY  - CONF
AN  - 01140992
AU  - Ismail, M A
AU  - Samsudin, A R
AU  - Rafek, A G
AU  - Nayan, K A M
AU  - American Society of Civil Engineers
TI  - In Situ Determination of Layer Thickness and Elastic Moduli of Asphalt Pavement Systems by Spectral Analysis of Surface Waves (SASW) Method
SN  - 9780784410448
PY  - 2009
SP  - pp 70-76
AB  - Spectral Analysis of Surface Waves (SASW) is a non-destructive method for determining the stiffness profile of pavement sites.  The method consists of generation, measurement, and processing of dispersive elastic waves in layered systems.  The test is performed on the pavement surface at low strain level, where the elastic properties are considered independent of strain amplitude.  During an SASW test, an impact source was used to generate energy at various frequencies.  Two vertical acceleration transducers are set up to detect the energy transmitted through the testing media.  By recording signals in digitised form using a data acquisition system and processing them, surface wave velocities can be determined by constructing a dispersion curve.  Through forward modeling, the shear wave velocities can be obtained, which can be related to the variation of stiffness with depth.  This paper presents the results of two case studies for near-surface profiling of two different asphalt pavement sites.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt pavements
KW  - Nondestructive tests
KW  - Rayleigh waves
KW  - Spectral analysis of surface waves
KW  - Spectrum analysis
KW  - Stiffness
KW  - Thickness
UR  - https://trid.trb.org/view/900331
ER  - 

TY  - CONF
AN  - 01140991
AU  - Jia, Ruihua
AU  - Yang, Junsheng
AU  - Li, Jiansheng
AU  - American Society of Civil Engineers
TI  - Monitoring and Numerical Analysis of Soil Displacements Due to Excavation of the Exit of Liuyang River Tunnel
SN  - 9780784410448
PY  - 2009
SP  - pp 218-224
AB  - Liuyang River tunnel, one of the longest tunnels in Wuhan-Guangshou railway passenger dedicated line, encountered low overburden, weak rock and crowded surface buildings in exit.  If incorrect excavation method was tacked, it will cause serious damages to the environment and buildings.  As it belongs to large-section excavation, for which cross section area surpasses 150 m(squared).  In order to avoid oversize subsidence by excavation of the large cross section, field monitoring including stratum displacement and three dimensional deformations were carried out.  Combined field monitoring with numerical analysis, stratum displacement distributed rule in large cross section tunnel excavation process was observed, which showed that the construction process is safe.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - China
KW  - Dislocation (Geology)
KW  - Excavation
KW  - Monitoring
KW  - Numerical analysis
KW  - Rivers
KW  - Tunnels
UR  - https://trid.trb.org/view/900936
ER  - 

TY  - CONF
AN  - 01140989
AU  - Zhang, Ling
AU  - Zhao, Ming-Hua
AU  - Zhao, Heng
AU  - American Society of Civil Engineers
TI  - Time Effect on Bearing Capacity of Composite Foundation with Stone Columns
SN  - 9780784410448
PY  - 2009
SP  - pp 183-188
AB  - Stone column is an economical treatment method in embankment engineering.  Controlling potential bearing capacity failure is a challenging problem in this design technique.  A modified bearing capacity calculation method which takes the influence of time into account is presented by utilizing two-dimension consolidation theory.  Also, a case study to validate the proposed method and to study the time effect on the bearing capacity of stone column foundation system is represented in this paper.  The analytical result shows that the bearing capacity of stone column composite foundation increases with increase in time.  It is therefore suggested that the time effect on the bearing capacity of the composite foundation formed by stone columns should be taken into account in embankment engineering for the economical and optimal design.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bearing capacity
KW  - Columns
KW  - Composite structures
KW  - Embankments
KW  - Foundations
KW  - Stone
UR  - https://trid.trb.org/view/900838
ER  - 

TY  - CONF
AN  - 01140987
AU  - Zhang, Ge
AU  - Kang, Shilei
AU  - American Society of Civil Engineers
TI  - Interaction of Pipe-Roof Reinforcement and Tunnel Construction under Existing Highway
SN  - 9780784410448
PY  - 2009
SP  - pp 232-236
AB  - Pipe-roof has been adopted extensively as pre-support in tunnel construction.  The vertical deformations of the pipe-roofs in the entrance of Liuyanghe Tunnel are monitored by installation of a series of strain gauges to investigate the mechanical behavior of the pipe-roofs during the tunnel excavation.  Based on the monitoring results, the mechanical characteristics and the evaluation of the reinforced effect of pipe-roof in the construction process were analyzed.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Mechanics
KW  - Pipe
KW  - Reinforcement (Engineering)
KW  - Roofs
KW  - Tunneling
UR  - https://trid.trb.org/view/900941
ER  - 

TY  - CONF
AN  - 01140985
AU  - Zhang, Rui
AU  - Zheng, Jian Long
AU  - Yang, He Ping
AU  - American Society of Civil Engineers
TI  - Experimental Study on K0 Consolidation Behavior of Recompacted Unsaturated Expansive Soil
SN  - 9780784410448
PY  - 2009
SP  - pp 27-32
AB  - To investigate the variation of K(subzero), the coefficient of lateral earth pressure at rest, with initial saturation degree and constant radial stress, a series of K(subzero) consolidation tests were conducted on expansive soil samples under different saturation and stress conditions using a stress-path triaxial system equipped with Hall-effect transducer.  The coefficient K(subzero) of every sample were obtained by strictly confining radial strain and evenly increasing radial stress to a given value with a slow and steady speed.  The test results showed that the curve axial stress-radial stress exhibits nonlinear under small saturation degree; K(subzero) of samples in different saturation and stress state ranged from 0.22 to 0.72 and increased with increase of initial saturation degree and radial stress.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Coefficients
KW  - Earth pressure
KW  - Soil compaction
KW  - Soil consolidation test
KW  - Swelling soils
KW  - Unsaturated soils
UR  - https://trid.trb.org/view/900205
ER  - 

TY  - CONF
AN  - 01140983
AU  - Zhang, Xuemin
AU  - Yang, Junsheng
AU  - Chen, Jiejin
AU  - American Society of Civil Engineers
TI  - Stability Analysis of Tunnel Driven in Stratified Anisotropic Rockmass
SN  - 9780784410448
PY  - 2009
SP  - pp 137-242
AB  - In present engineering design, rock mass is simply treated as an isotropic material and their strength parameters are given by decreasing those of intact rock through joint connectivity, which is introduced to reflect the integrity of rock mass separated by joints.  This method may be acceptable for most jointed rockmass.  But some sedimentary or metamorphic rocks, such as shales, sandstones, slates, phyllites and schists, are characterized by inherent anisotropy due to the existence of the preferentially oriented weakness plane.  In this study, the influences of the anisotropic properties of rockmass on the deformation and stability of tunnel are analyzed by the site monitoring and numerical calculation.  A detailed investigation on the engineering geological conditions of the horizontal stratified strata in Queerxi Highway Tunnel was carried out.  The deformation and the surrounding rock pressure are monitored, and then field measuring results and distributing law are summarized.  The results show that anisotropy of rockmass has remarkable influence on the deformation properties and stability of tunnel in stratified jointed rockmass.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Anisotropy (Physics)
KW  - Deformation
KW  - Joints (Engineering)
KW  - Rocks
KW  - Stability (Mechanics)
KW  - Tunnels
UR  - https://trid.trb.org/view/900943
ER  - 

TY  - CONF
AN  - 01140982
AU  - Yang, F
AU  - Yang, J S
AU  - American Society of Civil Engineers
TI  - Rigid Blocks Failure Mechanism for Stability of Shallow Tunnel Using Upper Bound Solution
SN  - 9780784410448
PY  - 2009
SP  - pp 249-255
AB  - A rigid block failure mechanism of shallow rectangular tunnel is proposed to calculate the needed support pressure for tunnel stability using upper bound solution.  The velocity discontinuities in the side wall of the shallow rectangular tunnel of the failure mechanism occur in both radial and tangent directions.  Formulas for calculating support pressure using upper bound solution are deduced based on the presented failure mechanism, and the calculation program is compiled.  It is shown that the proposed rigid block failure mechanism can be used effectively to analyze the stability problems of shallow rectangular tunnel using upper bound solution.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Excavation
KW  - Failure analysis
KW  - Tunnels
UR  - https://trid.trb.org/view/900947
ER  - 

TY  - CONF
AN  - 01140981
AU  - Zhai, Endi
AU  - Lawson, Scott
AU  - American Society of Civil Engineers
TI  - Geotechnical Design of a Bridge Widening Project in a Highly Active Seismic Region of Southern California
SN  - 9780784410448
PY  - 2009
SP  - pp 177-182
AB  - This paper presents geotechnical issues and the authors' design approaches for the Upper Oso Reservoir Bridge Widening located along State Route 241 in Mission Viejo, California.  The total bridge length is approximately 1540 feet (470 m).  The foundations of the existing bridge structures consist of 36-inch (0.91) diameter cast-in-drilled-hole (CIDH) piles and driven steel H-piles.  The subsurface materials at the bridge site were investigated by a field exploration program.  Key geotechnical design involved development of new seismic design parameters and acceleration response spectra for an Upper Level Earthquake (ULE) and a Lower Level Earthquake (LLE); evaluation of new fill and liquefaction-induced settlements on the existing and new foundations; pile foundation modeling and capacity assessment; abutment slope seismic stability and deformation.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bridge design
KW  - Earthquake engineering
KW  - Earthquake resistant design
KW  - Geotechnical engineering
KW  - Pile foundations
KW  - Slope stability
KW  - Southern California
UR  - https://trid.trb.org/view/900833
ER  - 

TY  - CONF
AN  - 01140980
AU  - Chen, Jiejin
AU  - Yang, Junsheng
AU  - Wang, Honggui
AU  - Liu, Baochen
AU  - Yang, Xiaoli
AU  - American Society of Civil Engineers
TI  - A Model of Tunnel Safety Risk Quantitative Identification
SN  - 9780784410448
PY  - 2009
SP  - pp 211-217
AB  - As in urban areas, construction of tunnel inevitably leads to ground movements.  These must be carefully predicted if there is a risk of settlement damage to nearby structures.  How to identify the real danger is the basis of quantitative risk analysis of buildings.  Due to various conditions, it is impossible to undertake a risk assessment of each building.  In the process of excavation, the mechanism of interaction of the tunnel and adjacent structures is very complicated because ground movements are affected by a lot of factors, such as the formation conditions, the tunnel section depth and size, foundation type and geometric characteristics of adjacent building, and relative position, etc.  So, a practical and reliable quantitative model with concise, clear physical meaning of the parameters is in need.  Referencing the quantitative risk assessment methodology of petrochemical plant, tunnel safety risk identification model could be established and it can quickly and reliably identify the high-risk buildings.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Risk management
KW  - Safety
KW  - Seismicity
KW  - Tunneling
KW  - Tunnels
UR  - https://trid.trb.org/view/900935
ER  - 

TY  - CONF
AN  - 01140979
AU  - American Society of Civil Engineers
TI  - Recent Advancement in Soil Behavior, In Situ Test Methods, Pile Foundations and Tunneling: Selected Papers From the 2009 GeoHunan International Conference
SN  - 9780784410448
PY  - 2009
SP  - 302p
AB  - Natural soil deposits exhibit a high degree of non-homogeneity and their geotechnical properties can change unexpectedly due to varying stress conditions. This makes soil behavior a multi-dimensional and multi-faceted phenomenon. This proceedings contains 44 papers that were presented at the GeoHunan International Conference, Challenges and Recent Advances in Pavement Technologies and Transportation Geotechnics, held in Changsha, Hunan, China, from August 3 to 6, 2009.  The proceedings examines the current technological advances in geotechnical engineering, specifically with regard to soil behavior and testing methods. The papers gathered in this volume underscore the significance and validity of in situ and laboratory testing in the design of foundations, tunneling, and soil structures. The topics analyzed in this volume include: (1) Soil Behavior and Laboratory Testing; (2) In Situ Test Methods for Site Characterization, Design, and Quality Control of Earth Structures and Subgrades; (3)Pile Foundations in Subgrade; and (4) Tunnel Engineering. This publication will be valuable to geotechnical professors and students, geotechnical engineers, design engineers, contractors, and professionals involved in geotechnical engineering.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Design
KW  - Field tests
KW  - Laboratory tests
KW  - Pile foundations
KW  - Soil mechanics
KW  - Test procedures
KW  - Tunneling
UR  - https://trid.trb.org/view/900141
ER  - 

TY  - CONF
AN  - 01140977
AU  - Wang, Hong-gui
AU  - Xu, Lin-rong
AU  - Chen, Jie-jin
AU  - Lv, Da-wei
AU  - American Society of Civil Engineers
TI  - Study on the Strength Mechanism of Coarse-Grained Soil Influenced by Clay Content Based on Laboratory Test
SN  - 9780784410448
PY  - 2009
SP  - pp 14-19
AB  - Featured by its high strength and good water stability, coarse-grained soil can be mixed with clay and used as fine-property filler in embankment construction.  However, the mixing ratio is usually difficult to determine.  If the coarse-grained soil content is excessively high, the embankment is prone to crack or damage because of cohesion deficiency.  On the contrary, if the coarse-grained soil content is too low, its high strength can not be utilized effectively, which may result in strength deficiency and excessive settlement.  Based on field survey and laboratory test results, this paper has made deep analysis on the strength mechanism of glacial sediment coarse-grained soil, and the reasonable mixing ratio of coarse-grained soil and clay soil has been discussed.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Clay
KW  - Coarse grained soils
KW  - High strength
KW  - Laboratory tests
UR  - https://trid.trb.org/view/900202
ER  - 

TY  - CONF
AN  - 01140976
AU  - Yuan, Deren
AU  - Celaya, Manuel
AU  - Nazarian, Soheil
AU  - American Society of Civil Engineers
TI  - Evaluation of Pavement Layers and Foundation Sites with Seismic Surface Wave Method
SN  - 9780784410448
PY  - 2009
SP  - pp 102-107
AB  - This paper provides the fundamentals, capabilities and limitations of the seismic surface-wave method as applied to in-situ testing of pavement and foundation and represents the results obtained from its recent applications in a number of projects.  These applications include characterization of flexible pavement layers during construction, monitoring of early-age strength development of Portland cement concrete and evaluation of soil foundations.  The issues on understanding the results from surface-wave tests and how to incorporate them in those requirements adopted in most existing specifications or common practices are discussed.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Foundations
KW  - Pavements
KW  - Rayleigh waves
KW  - Seismic effects
UR  - https://trid.trb.org/view/900364
ER  - 

TY  - CONF
AN  - 01140975
AU  - Shi, Chenghua
AU  - Peng, Limin
AU  - Li, Jun
AU  - American Society of Civil Engineers
TI  - Study on the Stratum Deformation Caused by Tunnel Excavation with Different Division of Cross-Section
SN  - 9780784410448
PY  - 2009
SP  - pp 262-269
AB  - Sequential excavation method is often used in urban tunnel construction.  Based on the stochastic medium theory and according to the stratum deformation caused by element excavation, the stratum deformation united calculating equation under this excavation method is studied, which can take into account the development course of the deformation with the different tunnel section excavation.  Then the time-space rules of the stratum deformation caused by tunnel excavation with different division of cross-section are discussed.  The maximum of stratum deformation and curvature arise after some part of the whole tunnel, rather than the whole tunnel section has been excavated.  Double-sidewalls heading excavation method has more control effect on stratum deformation than central departure excavation method.  The study achievement can provide scientific basis for controlling the stratum deformation caused by tunnel construction, and protecting the safety of the buildings and pipelines around the tunnel.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Cross sections
KW  - Deformation
KW  - Excavation
KW  - Soils
KW  - Tunnels
UR  - https://trid.trb.org/view/900953
ER  - 

TY  - CONF
AN  - 01140973
AU  - Yang, Wei-chao
AU  - Peng, Li-min
AU  - Wang, Li-chuan
AU  - American Society of Civil Engineers
TI  - Method of Ground Settlement Prediction in Urban Tunnel Construction Based on ARMA
SN  - 9780784410448
PY  - 2009
SP  - pp 270-275
AB  - Deformation of surrounding rock during tunnel excavation could be regarded as a time sequence. In this paper, the auto regressive moving average (ARMA) process of tunnel deformation prediction during construction, which can, to some extent, modulate model parameters according to the input and output data, adjust them to its optimal values in some statistical conditions through the iterative algorithm.  Firstly, the raw monitoring data is dealt with by difference operation and the stationary error time series is obtained.  Secondly, the randomicity and the stabilization of the error series have been analyzed to confirm the feasibility of ARMA model.  Both the autocorrelation function and partial autocorrelation function of the error series are tested, and the order of model ARMA is obtained based on the AIC criterion.  Finally, the method of least square is adopted for parameter estimation.  As a test, this modeling is used to predict the surface settlement of a Shenzhen metro line 2 of China.  The results of engineering case indicate that ARMA is reliable in deformation prediction.  In addition, the new-information model idea has been put into the model to achieve the real-time forecast of settlement.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Deformation
KW  - Excavation
KW  - Forecasting
KW  - Ground settlement
KW  - Soils
KW  - Tunneling
KW  - Urban areas
UR  - https://trid.trb.org/view/900954
ER  - 

TY  - CONF
AN  - 01140972
AU  - Hu, Wei
AU  - Zou, Yinsheng
AU  - American Society of Civil Engineers
TI  - Research on Mechanic Characteristic of Waterproof Membrane for Highway Tunnel
SN  - 9780784410448
PY  - 2009
SP  - pp 276-280
AB  - Multi-waterproof measures are adopted to highway tunnel, where waterproof membrane is the most vital link between initial lining and final lining during waterproof system.  In light of plenty of field monitoring data by compress sensors, the article presents phase and position of the maximal compress stress of waterproof membrane during pouring final lining, and different calculation formula of analyzing self-weight stress and temperature stress of concrete.  The article also presents tensile stress condition under surrounding rock bad extra-excavation and stress calculation by finite element method of nonlinear hardening constitutive model.  The mechanic characteristic contributes to applied value for simplifying reliability assessment parameters and conducting safety construction for waterproof membrane.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Mechanical properties
KW  - Safety
KW  - Tunnel lining
KW  - Tunneling
KW  - Tunnels
KW  - Waterproofing
UR  - https://trid.trb.org/view/900955
ER  - 

TY  - CONF
AN  - 01140971
AU  - Zhao, L H
AU  - Li, L
AU  - Yang, F
AU  - Dan, H C
AU  - Yang, X L
AU  - American Society of Civil Engineers
TI  - Study on the Ultimate Pullout Capacity and Shape Modification Factors of Horizontal Plate Anchors Based on Nonlinear Mohr-Coulomb Failure Criterion
SN  - 9780784410448
PY  - 2009
SP  - pp 95-101
AB  - Based on the limit analysis and nonlinear Mohr-Coulomb failure criterion, the ultimate pull-out capacity of horizontal place anchors is calculated, in which the type of anchors and the corresponding failure mechanism are taken into consideration.  The ultimate pullout capacity is obtained by a nonlinear sequential quadratic programming algorithm, and the theoretical results are compared with the available results presented in the existing literatures.  The relationship between the nonlinear parameter and the ultimate pullout capacity is analyzed.  The shape modification factors for different kind of anchors are given through a multiple nonlinear regression method.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Anchor plates
KW  - Failure
KW  - Mohr-Coulomb failure criterion
KW  - Pullout capacity
KW  - Ultimate load design
UR  - https://trid.trb.org/view/900363
ER  - 

TY  - CONF
AN  - 01140970
AU  - Yu, Chuang
AU  - Liu, Songyu
AU  - Pan, Linyou
AU  - Cai, Yuanqiang
AU  - American Society of Civil Engineers
TI  - The Characteristic of Vertical Stress in the Fill of Piled Embankments
SN  - 9780784410448
PY  - 2009
SP  - pp 133-138
AB  - Piled embankments have technical and economical advantages over other soft ground improvement methods.  The load transfer mechanism in piled embankments is referred to as arching effect.  Piled embankments are generally related to the advantage of soil arching effects of granular soil.  Most of present research on piled embankments is focusing on the soil arching effect, but there is a lack of investigation on the vertical stress distribution in the inner soil arching under embankments.  In this paper a new analytic solution called multi-arching theory is applied to investigate the behavior of soil arching.  The solution shows the stress distribution in piled embankments as follows: the vertical stress above the soil arching increased as geostatic state, and inside of the soil arching the vertical stress decreased nonlinearly, which reflects the mechanism of soil arching effect and the vertical stress distribution in piled embankments.  The theoretical solutions show good agreements with model test data.  The results demonstrate that the distribution of vertical stress in embankments is helpful in understanding the behavior of piled embankments.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Arching (Soils)
KW  - Deformation curve
KW  - Embankments
KW  - Fills
KW  - Piles (Supports)
KW  - Soil stabilization
KW  - Stresses
UR  - https://trid.trb.org/view/900371
ER  - 

TY  - CONF
AN  - 01140969
AU  - Huang, Hai
AU  - Tutumluer, Erol
AU  - Youssef, M A Hashash
AU  - Ghaboussi, Jamshid
AU  - American Society of Civil Engineers
TI  - Discrete Element Modeling of Aggregate Behavior in Fouled Railroad Ballast
SN  - 9780784410448
PY  - 2009
SP  - 33-41
AB  - This paper describes an aggregate imaging based Discrete Element Modeling (DEM) methodology successfully employed to model both clean and coal dust fouled railroad ballast behavior.  Laboratory direct shear box tests were conducted on granite type clean and fouled ballast aggregate samples.  The size, shape and angularity properties of the aggregate particles were obtained through image analysis.  Accordingly, direct shear box DEM simulations were conducted for different aggregate contact friction conditions.  Both the clean ballast behavior and the heavily fouled case of coal dust filling completely all the voids in ballast were adequately modeled using the DEM approach by assigning a lower contact friction angle as the controlling discrete element model parameter in the latter case.  In accordance with the direct shear test results, much lower shear stress-shear deformation curves, i.e., lower shear strengths, were predicted the coal dust fouled case using the DEM simulation.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Aggregates
KW  - Ballast (Railroads)
KW  - Discrete element modeling
KW  - Shear strength
UR  - https://trid.trb.org/view/900207
ER  - 

TY  - CONF
AN  - 01140967
AU  - An, Yonglin
AU  - Peng, Limin
AU  - American Society of Civil Engineers
TI  - Simulation of a New Construction Method in a Shallow-Buried Weak Tunnel
SN  - 9780784410448
PY  - 2009
SP  - pp 256-261
AB  - The double down-side drifts construction method was put forward in a shallow-buried weak tunnel.  Its construction behavior was studied by numerical simulation using MIDAS.  Results show: (1) this method can improve tunnel load, the key construction step is arch ring excavation and core soil is good to tunnel steady; (2) weak parts mainly locate wall foot and crown foot of drifts, crown foot of tunnel and the connections; (3) reinforcement of soil under the drifts has no apparent effect on improving rock deformation and support load.  From an economical and safety point of view, main parts to be reinforced are drifts (its foot depth, connection parts with tunnel, and its corners); core soil should be kept if rock is unsteady and needs reinforcing.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Construction management
KW  - Simulation
KW  - Tunneling
KW  - Tunnels
UR  - https://trid.trb.org/view/900952
ER  - 

TY  - CONF
AN  - 01140966
AU  - Liu, Bo
AU  - Li, Tao
AU  - Qiao, Guogang
AU  - American Society of Civil Engineers
TI  - SEM Microstructure and Chemical Foamed-Soil Modification Tests for Swelling Red Strata in Subway Shield Tunneling Engineering
SN  - 9780784410448
PY  - 2009
SP  - pp 20-26
AB  - A difficult problem for tunneling in red strata soils in Guangzhou subway is that the mud cakes are easily formed in the cut face of shield machine.  It has frequently induced ground failures and collapse accidents.  The microstructures of red soil are studied using SEM (scanning electron microscope).  The SEM tests disclose the important microstructures of red strata minerals such as micro-lamina tactoid, petal-shape and micro-porosity.  The mechanism of water-induced red strata swelling damage and high-viscosity characteristics are then investigated.  The disclosed microstructure and micro-porous properties provide the evidence for understanding the mechanical behavior of Guangzhou swelling red strata soils.  Furthermore, the chemical foamed-soil modification tests for red soils are presented.  Experiments on foam modified red soils disclose the relationship between permeability and fluidity for foamed red soils and sandy soils in subway engineering.  This research is helpful for applying foamed soil to stabilize the tunneling face and to prevent ground seepage damage in shield tunneling construction.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - China
KW  - Electron microscopes
KW  - Foams
KW  - Microstructure
KW  - Shields (Tunnels)
KW  - Soils by properties
KW  - Subways
KW  - Swelling
KW  - Tunneling
UR  - https://trid.trb.org/view/900203
ER  - 

TY  - CONF
AN  - 01140965
AU  - Yang, Heping
AU  - Xiao, Jie
AU  - Wang, Shu
AU  - Zuo, Weiran
AU  - American Society of Civil Engineers
TI  - Study on the Determination of Residual Shear Strength for Expansive Soil
SN  - 9780784410448
PY  - 2009
SP  - pp 49-54
AB  - Generally, it is very difficult to obtain the undisturbed soil and keep it in the undisturbed state in practice.  In this paper the residual shear strength of Grey-white expansive soil of Ningming was studied based on the analysis of the influencing factors of residual shear strength of expansive soil.  The test results of undisturbed samples, compacted samples and samples prepared by static compaction conducted by strain-controlled repeated direct shear test were compared, which show that the differences of the peak shear strengths are very large but the differences of the residual shear strengths are very small.  By the comparison and analysis of the test results, it is more reasonable and practical to use the residual shear strength of static compaction sample to represent that of undisturbed sample.  Therefore, the residual shear strength of samples prepared by static compaction can be taken as that of Ningming Grey-white expansive soil.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Dislocation (Geology)
KW  - Shear strength
KW  - Swelling soils
UR  - https://trid.trb.org/view/900270
ER  - 

TY  - CONF
AN  - 01140964
AU  - An, Deng
AU  - Yang, Xiao
AU  - American Society of Civil Engineers
TI  - Modeling Stress-Strain Behavior of Sand-EPS Beads Lightweight Fills Based on Cam-Clay Models
SN  - 9780784410448
PY  - 2009
SP  - pp 55-61
AB  - A lightweight fill was produced by blending expanded polystyrene (EPS) beads and sands in proportions.  Such formed granular geomaterials, known as sand-EPS lightweight fills, have potentials of being lightweight compared to traditional fills, thus are suitable for many infrastructure works where less overburdens are expected, e.g., utilities trench backfills.  Consolidated drained triaxial compression (TC) tests were conducted on the lightweight fills to observe materials' stress-strain relationships, specifically, the stress-strain variations associated with the mixing ratios of EPS beads.  EPS beads were incorporated into the mixtures based on their mass ratios over sands, i.e., 0.5%, 1.5% and 2.5%.  It was found that confining pressures and mixing proportions played important roles in affecting the stress-strain behaviors of lightweight fills.  The materials underwent shear contraction, which is related to the inclusion of EPS beads.  The constitutive law of the lightweight fills was derived based on Cam-clay model and modified Cam-clay model, and verified by the test results.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Backfill soils
KW  - Deformation curve
KW  - Lightweight materials
KW  - Polystyrene
KW  - Sandy clays
UR  - https://trid.trb.org/view/900271
ER  - 

TY  - CONF
AN  - 01140963
AU  - Pokpong, Sathaporn
AU  - American Society of Civil Engineers
TI  - Nonlinear Response of Passively Loaded Piles Founded in Soft Bangkok Clay
SN  - 9780784410448
PY  - 2009
SP  - pp 120-125
AB  - Embankment construction on soft clay can result in the development of significant lateral ground movement.  When the pile is installed adjacent to this unstable embankment, it may experience unexpected lateral passive loading along its length and may cause the integrity problem of the superstructure.  A lot of numerical and experimental research works have been constructed for better understanding of the behavior of passively loaded pile.  However, the nonlinear response of piles subjected to horizontal ground movement is difficult to analyze with two-dimensional technique since the passively loaded piles are truly three-dimensional problem.  In order to investigate the complex soil-pile interaction, the three-dimensional finite element analysis was employed in this study.  The passive p-delta curves are presented to account for a nonlinear response of piles as the common p-y curves may not properly describe the actual behavior of piles subjected to lateral ground movement.  It was found that the generated p-delta curves were dependent on pile spacing; when pile spacing decreased the passive p-delta curves stiffened, whereas the active p-y curves softened.  A better understanding of behavior of passively loaded piles adjacent to an embankment constructed on soft Bangkok clay was achieved.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Clay
KW  - Nonlinear equations
KW  - Piles (Supports)
KW  - Seismicity
KW  - Soft soils
KW  - Thailand
UR  - https://trid.trb.org/view/900368
ER  - 

TY  - CONF
AN  - 01140962
AU  - Wang, X Q
AU  - Liu, H L
AU  - Chen, Y H
AU  - American Society of Civil Engineers
TI  - Study on Flexural Behavior of Cast-in-Place Concrete Y-Shaped Vibro-Pile
SN  - 9780784410448
PY  - 2009
SP  - pp 152-158
AB  - The influence of four independent variables of Y-shaped cross section configuration on flexural behavior was analyzed by flexural factor of section and area ratio according to actual load on Y-shaped vibro-pile under three conditions, i.e., sharp-angled location of cross section, concave arc position and typical tension point.  Flexural behavior under above three conditions is quite different and it changes with variation law of four independent variables of the cross section.  The same template radian exists while the other three independent variables are defined, so that flexural behavior under conditions of sharp-angled position and typical tension point reaches the minimum value.  Solution of corresponding template radian of the minimum value of flexural behavior has been introduced by utilizing the mathematical analysis software, Mathematica.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Cast in place concrete
KW  - Flexural strength
KW  - Mathematical analysis
KW  - Piles (Supports)
UR  - https://trid.trb.org/view/900767
ER  - 

TY  - CONF
AN  - 01140961
AU  - Yang, Xiuzhu
AU  - Lei, Jinshan
AU  - American Society of Civil Engineers
TI  - Dynamical Response of Qifeng-Lake Dam during Earthquake
SN  - 9780784410448
PY  - 2009
SP  - pp 243-248
AB  - Two dimensional dynamic finite element and effective stress method were used to analyze dynamic response of Qifenghu Lake earth-rock dam during earthquake.  During analysis, the floodwater level in the upriver is 198.5 meter and 180 meter in the downriver.  Peak acceleration of earthquake was 0.275g and it lasted 10s.  Calculation results showed that pore water pressure after earthquake was as nearly twice as that before earthquake.  Some region in the central clay wall and the silt groundsill where pore water pressure is equal to lateral consolidation pressure was found.  This will endanger the stability of the dam.  Through analyzing dynamical response of nodes on the dam surface, the authors find that absolute peak acceleration and peak displacement of D and E node in the middle of the dam is greater than others.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - China
KW  - Dams
KW  - Dynamic response
KW  - Earthquakes
KW  - Lakes
KW  - Pore water pressures
UR  - https://trid.trb.org/view/900945
ER  - 

TY  - CONF
AN  - 01140960
AU  - Kim, Hak Sung
AU  - Park, In Beom
AU  - Park, Chul Soo
AU  - Mok, Young Jin
AU  - American Society of Civil Engineers
TI  - Logging for Diametric Variation of Stone Columns Using Crosshole Seismic Tests
SN  - 9780784410448
PY  - 2009
SP  - pp 77-82
AB  - An integrity testing for stone columns was attempted using crosshole S-wave logging.  The method is conceptually quite similar to the crosshole sonic logging (CLS) for drilled piers.  The critical difference in the logging is the use of s-wave rather than p-wave, which is used in CSL, because s-wave is the only wave sensing the stiffness of slower unbounded materials than water.  An electro-mechanical source, which can generate reversed S-wave signals, was utilized in the logging.  The stone column was delineated from the S-wave travel times across the stone column, and taking S-wave velocities of the crushed stone and surrounding soil into account.  The volume calculated from the diametrical variance delineated is very close to the actual quantity of the stone filled.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Columns
KW  - S waves
KW  - Seismic tests
KW  - Stone
UR  - https://trid.trb.org/view/900340
ER  - 

TY  - CONF
AN  - 01140957
AU  - Wang, You
AU  - Huang, Liang
AU  - Wang, Xing-hua
AU  - Zhao, Ming-Hua
AU  - American Society of Civil Engineers
TI  - Research on Meshless Method Using Uniform Design and Its Application in Piles Engineering
SN  - 9780784410448
PY  - 2009
SP  - pp 114-119
AB  - In order to ensure that the nodes are distributed uniformly in the definition domain of calculation points, the uniform experiment design is introduced in the meshless method, which can make the nodes distribution uniform in the domain.  Using uniform designs table, distributes these nodes, the interpolation function is built by those nodes, and dispersant equations are founded by the Galerkin Method.  According to this concept, a programme based on uniform design is made.  In order to verify the theory and programme, a load test of pile foundation is chosen to provide calculation data.  The calculated results accord with survey data on-the-spot and show that it's possible that the uniform design may be applied in the nodes distribution in meshless method.  And the calculation result obtained by less nodes is precise, based on the meshless method using uniform design.  Because the radius of influence domain is decreased, the computer workload is greatly reduced.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Deformation
KW  - Engineering
KW  - Finite element method
KW  - Meshfree formulations
KW  - Piles (Supports)
UR  - https://trid.trb.org/view/900367
ER  - 

TY  - CONF
AN  - 01140956
AU  - Kim, Hak Sung
AU  - Jung, Jae Woo
AU  - Lee, Tae Hee
AU  - Mok, Young Jin
AU  - American Society of Civil Engineers
TI  - Estimating Field Properties of Soft Soil Using Penetration-type S-Wave Probe
SN  - 9780784410448
PY  - 2009
SP  - pp 83-88
AB  - A new s-wave probe, called "MudFork," has been recently developed and is used in accurate measurements of shear wave velocities of soft soils.  The probe is composed of two bender elements mounted on a "fork" having two blades, one element perturbing ground and the other one monitoring seismic waves, and can be penetrated using SPT (standard penetration test) rods pushed with a routine boring machine.  To expand its use to estimate undrained shear strength and density, an attempt to correlate shear wave velocity to those properties was made at normally consolidated silt near Incheon, Korea.  A simple linear relationship between shear strength and shear wave velocity was obtained, and a tentative relationship between density and shear wave velocity was also defined.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Measurement
KW  - S waves
KW  - Soft soils
KW  - Soil penetration test
KW  - Soils by properties
KW  - Stiffness
UR  - https://trid.trb.org/view/900361
ER  - 

TY  - CONF
AN  - 01140955
AU  - Liu, SiSi
AU  - Zhao, Minghua
AU  - Yang, MingHui
AU  - Pan, Wei
AU  - American Society of Civil Engineers
TI  - Pile Samples Classification Method Based on the Self-Organizing Map Neural Network
SN  - 9780784410448
PY  - 2009
SP  - pp 171-176
AB  - To reduce the noise in learning samples while using BP neural network to predict the bearing capacity of pile foundation, a self-organizing map neural network was adopted to classify the collected pile samples in the paper.  Firstly, to maintain the SOM network at a stable situation, pile samples were discriminated into symbol codes and character codes, and a new coding model of pile character was established, by which a SOM neural network's weight formula of reduction was derived.  Then, clustering of pile samples were shown by calibrating the maximum response cell of the self-organizing map neural network.  Finally, case studies using the clustered samples as input vector to a BP network were presented, and the results showed that it was a good alternative approach for estimating the bearing capacity of pile foundation by using the improved solution with the characters of simplicity.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bearing capacity
KW  - Classification
KW  - Neural networks
KW  - Piles (Supports)
UR  - https://trid.trb.org/view/900771
ER  - 

TY  - CONF
AN  - 01140954
AU  - Lu, Jinchi
AU  - Elgamal, Ahmed
AU  - Shantz, Thomas
AU  - American Society of Civil Engineers
TI  - A Framework for 3D Nonlinear Ground-Foundation Analysis
SN  - 9780784410448
PY  - 2009
SP  - pp 189-196
AB  - Three-dimensional nonlinear finite element simulations are becoming increasingly feasible for transportation geotechnical applications.  This paper presents a robust and versatile framework that helps streamline the use of finite elements for seismic response of soil-structure systems.  In this regard, a Windows-based graphical-user-interface OpenSeesPL is developed for pile-ground interaction analysis.  Particularly suited to seismic applications, the open-source computational platform OpenSees is employed throughout.  OpenSeesPL allows convenient studies of three-dimensional seismic (earthquake) and/or push-over pile analyses.  Various ground modification scenarios may be also addressed by appropriate specifications of the material within the pile zone.  To illustrate the capabilities of OpenSeesPL, two studies are presented in this paper.  Lateral spreading effects on pile foundations are modeled, followed by an investigation of ground remediation in a mildly sloping silt stratum.  Along with the insights gained from these studies, the reported effort aims to highlight the analysis framework capabilities and range of potential applications.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Finite element method
KW  - Nonlinear equations
KW  - Pile foundations
KW  - Software
KW  - Soil structure interaction
UR  - https://trid.trb.org/view/900844
ER  - 

TY  - CONF
AN  - 01140915
AU  - Liping, Cao
AU  - Dong, Zejiao
AU  - Tan, Yiqiu
AU  - American Society of Civil Engineers
TI  - Research on Rheological Performance of SBS Modified Asphalt at Low Temperature
SN  - 9780784410424
PY  - 2009
SP  - pp 9-14
AB  - In this paper, phase angle and viscous modulus were used to study the low temperature rheological performance (LTRP) of nine kinds of styrene-butadiene-styrene (SBS) modified asphalts, with three penetration grades of base asphalts (90, 110, and 130) and three contents of weight (3%, 4.5% and 6%) of linear SBS modifiers. The LTRP of modified asphalts was tested using the Gemini 150 dynamic shear rheometer produced by Bohlin Company at the temperatures ranging from −10 °C to 10 °C at intervals of 5 °C. Then, the influence of the modifier contents on the LTRP of SBS modified asphalt was analyzed. The result indicated that the modifier contents have a great influence, which is apparently confined by base asphalt's penetration grade. The higher the grade is, the greater the influence. Lastly, the influence of the base asphalt's grade on the LTRP of SBS modified asphalt was investigated. The analysis showed that it plays an important role in the LTRP. What's more, the impact degree is dependent on the modifier's contents. The more the content is, the greater the impact degree is.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt grades
KW  - Impact
KW  - Low temperature
KW  - Modified asphalt
KW  - Modifiers
KW  - Rheology
KW  - Styrene butadiene styrene
UR  - https://trid.trb.org/view/900212
ER  - 

TY  - CONF
AN  - 01140909
AU  - Yang, Shi-Jiao
AU  - Zeng, Sheng
AU  - Yang, Hai-Fei
AU  - American Society of Civil Engineers
TI  - Economical Risk Analysis Model and Intelligent Optimization Methods Study of the Soil Slope Based on the Reliability
SN  - 9780784410424
PY  - 2009
SP  - pp 159-165
AB  - The study of modeling and optimization methods of the highway soil slope stability has been carried out based on the reliability theory in this paper, because of the extensive uncertainties of the cost and safety factors in highway slope design. First, considering the overall construction cost and risk cost, using the cost-benefit analysis method, taking the minimum total expected cost as the objective function, using the slope-type and slope-ratio as design variables and the reliability index of the slope stability as the main constraint conditions, and then the economical risk analysis model of the soil slope is established. Considering high nonlinearity of the model, genetic algorithm is used to iteratively solve and the optimum program in slope engineering design is developed based on the platform of MATLAB. The program was used to design slope engineering in some highway and the optimum slope-type and slope-ratios were obtained. The result shows that the program has good stability, high computational speed, high precision and practical value.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Algorithms
KW  - Costs
KW  - Economic factors
KW  - Mathematical models
KW  - Methodology
KW  - Optimization
KW  - Reliability
KW  - Risk analysis
KW  - Risk assessment
KW  - Safety
KW  - Slope stability
KW  - Slopes
KW  - Soils
UR  - https://trid.trb.org/view/900789
ER  - 

TY  - CONF
AN  - 01140903
AU  - Tao, Xu
AU  - Xiaoming, Huang
AU  - American Society of Civil Engineers
TI  - Effects of Magnesium Hydroxide on Asphalt Pyrolytic Characteristics and Kinetic Analysis
SN  - 9780784410424
PY  - 2009
SP  - pp 1-8
AB  - Thermogravimetry experiments and thermal analysis kinetics are used to analyze the effects of magnesium hydroxide on asphalt pyrolysis characteristics. The pyrolysis models are developed based on experiments to evaluate the flame-retarded mechanism of magnesium hydroxide to asphalt. The results indicate that asphalt pyrolysis process in N2 is a single stage, and presents unimodal character in DTG curves. Owing to endothermic decomposition and crystal water release of magnesium hydroxide, the temperature rise of asphalt is inhibited. Pyrolysis of SBS modified asphalt follows a one-dimensional pyrolysis mechanism model, but flame-retarded SBS modified asphalt follows a three-dimensional pyrolysis mechanism model. After adding magnesium hydroxide, asphalt pyrolysis kinetics parameters are raised and become available to decrease reactive activity and rate. Based on this study, it is obvious that the thermal stability of asphalt is improved by magnesium hydroxide under high temperatures. Equally, the flame-retarded performance of asphalt is also enhanced by using magnesium hydroxide.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt
KW  - Kinetics
KW  - Magnesium hydroxide
KW  - Mathematical models
KW  - Pyrolysis
UR  - https://trid.trb.org/view/900208
ER  - 

TY  - CONF
AN  - 01140895
AU  - Zhang, Yingxue
AU  - Chunhua, Han
AU  - Zhang, Qisen
AU  - American Society of Civil Engineers
TI  - Decision-Making Model of Highway Route Plan Based on Entropy and Entropy Weight Theory
SN  - 9780784410424
PY  - 2009
SP  - pp 127-132
AB  - It requires many factors to choose highway route plan. Different decision making aims will decide to select different decision making variables, namely indexes. There are also many different evaluation methods. This paper considers the general correlation of multiple objectives and multiple attributes based on Context Sensitive Design, and it presents the index system of decision-making route by investigating, analyzing, consulting experts and so on. In the decision-making problem of route plan which including indexes of M and plans of N, the paper gets the evaluation matrix of single object about multiple index by combining with the qualitative and quantitative principles, then gathers single index of different plans and forms a synthesis index based on entropy and entropy weight theory. At last, the best plan can be chosen by comparing the synthesis index value of different plans. It shows that the index system and decision-making model have reference value for engineering practice.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Decision making
KW  - Entropy (Communications)
KW  - Highways
KW  - Indexes (Information management)
KW  - Mathematical models
KW  - Planning
KW  - Routes and routing
UR  - https://trid.trb.org/view/900378
ER  - 

TY  - CONF
AN  - 01140894
AU  - du Plessis, L
AU  - Strauss, P J
AU  - Kilian, A
AU  - American Society of Civil Engineers
TI  - Provisional Results from Accelerated Testing of Ultra Thin-Layer Reinforced Concrete in South Africa
SN  - 9780784410424
PY  - 2009
SP  - pp 86-97
AB  - The CSIR Built-Environment, in conjunction with the University of Pretoria and the Cement and Concrete Institute of South Africa, developed a low cost option for the upgrading of unsurfaced (gravel) roads. The proposed solution is the placing of a thin layer of normal concrete reinforced with 5.6mm diameter steel with a mesh grid size of 200mm. This thin layer is placed on top of the existing unsurfaced road with minimal preparation to the existing road surface using labour-intensive construction methods. Through full-scale trials this type of upgrading proved to be adequate for low-volume traffic applications (e.g. residential streets) as well as for higher-volume applications (e.g. bus routes). During the trials test sections were subjected to a total of over 700,000 ESALs over a period of 5 years without showing any deterioration. In order to determine the structural capacity of this type of overlay full-scale Heavy Vehicle Simulator tests were conducted. This paper summarizes the initial results from the accelerated pavement testing (APT) tests and is aimed at building confidence in the use of thin-layer CRCP, with cognizance being taken of the pavement structure, support conditions, construction, climate and traffic.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Accelerated pavement tests
KW  - Reinforced concrete pavements
KW  - Reinforcing steel
KW  - Simulation
KW  - South Africa
UR  - https://trid.trb.org/view/900339
ER  - 

TY  - CONF
AN  - 01140892
AU  - Lambert, Nicholas
AU  - Denny, Kyle
AU  - Sukumaran, Beena
AU  - Mehta, Yusuf
AU  - American Society of Civil Engineers
TI  - Evaluation of the Compaction Characteristics of Unbound Material Using the Superpave Gyratory Compactor
SN  - 9780784410424
PY  - 2009
SP  - pp 65-71
AB  - During previous full scale tests at the National Airport Pavement Facility (NAPTF) at Atlantic City, significant consolidation of the subbase layer occurred during aircraft trafficking accompanied by shear flow failure in the underlying low strength subgrade material. In order to understand the compaction and shear flow characteristics of the subbase layer during construction and trafficking, the material was compacted in the Superpave Gyratory Compactor (SGC) at various stress levels and at different moisture contents. Since the SGC is primarily used for compaction of asphalt concrete, the compaction characteristics in the Superpave Gyratory Test were calibrated to field compaction of the subbase material during construction at similar moisture contents. The field data collected included the change in density of the subbase layer during compaction with number of passes of the roller. The calibration was done by comparing the shape of the curve. The calibration provided the benchmark values for laboratory evaluation of unbound material in SGC, such as stress level and the gyratory angle of testing. The shape of the compaction curve and the density at various gyrations levels provided an insight into the understanding of the compaction characteristics of the subbase material under roller compaction. This paper provides the airport pavement designers the efficacy of using the SGC as a means of evaluating the performance of unbound material during compaction.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Airport runways
KW  - Calibration
KW  - Compaction
KW  - Evaluation and assessment
KW  - Field studies
KW  - Gyratory compactors
KW  - Pavement design
KW  - Shear flow
KW  - Superpave
KW  - Unbound materials
UR  - https://trid.trb.org/view/900259
ER  - 

TY  - CONF
AN  - 01140888
AU  - Qiu, Xin
AU  - Wong, Winggun
AU  - Hu, Changbin
AU  - American Society of Civil Engineers
TI  - Laboratory Performance Evaluation on Polymer Modified Porous Asphalt Concrete
SN  - 9780784410424
PY  - 2009
SP  - pp 15-21
AB  - This paper presents the details of the laboratory performance evaluation of the three types of polymer modified binders and their respective porous asphalt concrete. The same gradation was applied to all the mixtures and the base bitumen was Shell 60/70. The binder test results indicate that the SBR and SBS modified binders have the smaller temperature susceptibility and exhibit better performance in resisting ageing, rutting, and fatigue than the conventional penetration 60/70 binder. When evaluated in a series of laboratory tests designed to assess the fundamental mechanical properties and durability performance of porous asphalt concrete, the results show that the SBS modified porous asphalt concrete exhibits the most overall satisfactory performance with respect to stiffness, dynamic creep deformation, rutting, and moisture resistance damage among the three types of porous asphalt concretes studied. Based on the lab results and the cost-effectiveness analysis, the SBS modified porous asphalt concrete is recommended as the most favorable material to be used as a friction course in Hong Kong.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt concrete
KW  - Evaluation and assessment
KW  - Hong Kong (China)
KW  - Laboratory studies
KW  - Polymer modification
KW  - Polymer modified binders
UR  - https://trid.trb.org/view/900215
ER  - 

TY  - CONF
AN  - 01140886
AU  - Yuan, Jianbo
AU  - Zhang, Qisen
AU  - American Society of Civil Engineers
TI  - Theory and Application of Total Project Management
SN  - 9780784410424
PY  - 2009
SP  - pp 116-126
AB  - Based on the fundamental principles of total quality management and system engineering, total project management is defined and analyzed, which is a system management for all the fields of a project using the theories and methods of total quality management. After analyzing the characteristics of total time management, total information management and total risk management, and integrating these with the theories of total quality management, total cost management and total contract management, the scientific project management method is total project management is systematically demonstrated. The theories of total project management are corresponded with a new project management software system. This software system is designed and developed to meet the requirements of total project management. Using this software system in the project process can promote the development and application of total project management.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Applications
KW  - Project management
KW  - Risk management
KW  - Software
KW  - Theory
KW  - Time management
KW  - Total quality management
UR  - https://trid.trb.org/view/900377
ER  - 

TY  - CONF
AN  - 01140884
AU  - Zhang, Qi-sen
AU  - Chen, Yu-liang
AU  - Li, Xue-lian
AU  - American Society of Civil Engineers
TI  - Rutting in Asphalt Pavement under Heavy Load and High Temperature
SN  - 9780784410424
PY  - 2009
SP  - pp 39-48
AB  - Rutting is one of the main distresses in the asphalt pavements, especially in higher summer temperatures and/or under heavy loads. Efforts were made in this study to investigate rutting failures on Jing-Zhu expressway in China to determine the cause and the source of the rutting. The characteristics of the rutting on each asphalt pavement layer were analyzed by surveying the rutting depth, excavating transverse profile sections, and boring samples in the typical sections of expressways where different degrees of rutting damage were observed. It was found that 60% of the rutting was generated by the asphalt middle course layer and the remaining 40% came from the other surface layers, which was consistent with the mechanical analysis of the asphalt pavement that showed that the shear stress in middle asphalt course layer was the highest in magnitude, under load or temperature. With the combination of the indoor rutting tests on the samples from a corresponding location of the road shoulders, the influence of the high temperature stability of each asphalt pavement layer on rutting was analyzed using the method of ANOVA (Analysis Of Variance). The results indicated that the stability of the middle course layer impacted the rutting development the most. Finally, the relationship between the RD (rut depth) and the DS (dynamic stability) of each asphalt pavement layer was established using a nonlinear regression method. The governing criterion for the DS at the bottom course asphalt mixture was studied and recommendation made based on regression analysis.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt pavements
KW  - China
KW  - High temperature
KW  - Loads
KW  - Pavement layers
KW  - Rutting
KW  - Stability (Mechanics)
UR  - https://trid.trb.org/view/900225
ER  - 

TY  - CONF
AN  - 01140883
AU  - Liping, Cao
AU  - Lijun, Sun
AU  - Dong, Zejiao
AU  - American Society of Civil Engineers
TI  - Research on Permanent Deformation Property of Asphalt Mixture with Varying Temperature
SN  - 9780784410424
PY  - 2009
SP  - pp 32-38
AB  - Partial hourly pavement temperature variation measured in Shanghai was analyzed. Cumulative frequency of high temperature (above 50°C defined in this paper) was more than 90%. However, cumulative frequency of moderate temperature (20°C to 50°C defined in this paper) was less than 10%. Then permanent deformation (PD) of two asphalt mixtures at the temperatures ranging from 20°C to 60°C was measured using the APA (asphalt pavement analyzer). The results show that PD at 40°C can be as high as 50% of that at 60°C. Therefore, the PD property should be researched systemically. Firstly, the cumulative PD curve of a typical asphalt mixture was measured and defined by two zones. In the primary zone, the PD accumulates rapidly. The incremental PD tends to decrease, reaching a constant value in the secondary zone. Then, the PD property of asphalt mixture under varying temperatures was researched in laboratory. The result shows that the trend of the PD curves at the second stage was the same as but less than that at the first stage. Based on this study, it was concluded that temperature, number of load cycles, stress history, and intermission time are some of the major influencing factors on the PD of asphalt mixtures.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt mixtures
KW  - Permanent deformation
KW  - Properties of materials
KW  - Shanghai (China)
KW  - Temperature variation
UR  - https://trid.trb.org/view/900224
ER  - 

TY  - CONF
AN  - 01140882
AU  - Xiaoge, Tian
AU  - American Society of Civil Engineers
TI  - Application of GIS to Freeway Management System
SN  - 9780784410424
PY  - 2009
SP  - pp 133-137
AB  - An application scheme of Geographic Information System (GIS) in Freeway Management System (FMS) is proposed. The main contents of the system and the dynamic segmental technology adopted in the FMS were introduced. This FMS realized the integration management of spatial data and attribute data, offered explicit and efficient proofs for assistant decision-making by combining the characteristic and predominance of GIS with original FMS function. It fully utilizes the advantage of computer and GIS technology to modernize the management of freeway.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Data integration
KW  - Freeway management systems
KW  - Geographic information systems
KW  - Segmental units
KW  - Technology
UR  - https://trid.trb.org/view/900379
ER  - 

TY  - CONF
AN  - 01140880
AU  - Chen, Tung-Tsan
AU  - Hsu, Yao T
AU  - Wang, Chun-Yuan
AU  - American Society of Civil Engineers
TI  - A Correlation Study of the Existing Bridges for Failure Analysis-Case Study of Taichung County
SN  - 9780784410424
PY  - 2009
SP  - pp 173-180
AB  - In this study, a total of 935 data was used to analyze the correlation factors and positions of the common bridge damage through logistic regression. There are three aspects of the factor of bridge damage which include essential bridge character, external bridge condition, and internal bridge structure. Based on the whole bridge condition index, in terms of different damage positions, the authors performed the cross analysis which considered the different materials and bridge types. The authors constructed the logistic regression models and found all the factors which influence bridge damages in Taichung County, Taiwan.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bridges
KW  - Correlation analysis
KW  - Damage (Bridges)
KW  - Failure analysis
KW  - Logistic regression analysis
KW  - Mathematical models
KW  - Taichung (Taiwan)
UR  - https://trid.trb.org/view/900799
ER  - 

TY  - CONF
AN  - 01140874
AU  - American Society of Civil Engineers
TI  - Asphalt Material Characterization, Accelerated Testing, and Highway Management: Selected Papers From the 2009 GeoHunan International Conference
SN  - 9780784410424
PY  - 2009
SP  - 206p
AB  - The GeoHunan International Conference on Challenges and Recent Advances in Pavement Technologies and Transportation Geotechnics was held in Hunan, China, from August 3-6, 2009. Twenty five rigorously peer-reviewed papers presented at the conference are compiled in this American Society of Civil Engineers' Geotechnical Special Publication (GSP). A variety of pavement engineering issues are addressed in the book, along with materials, design, testing, highway construction, and other late research advances in various areas. Topics of the proceedings covered in the book include: embankment stabilization and tunneling; highway construction economics and management; pavement structure and material accelerated testing; recycled asphalt materials and pavements; and asphalt binder and mixture characterization. Those involved in the fields of pavement and geotechnical engineering particularly will find the data and information contained in this GSP book valuable.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Accelerated tests
KW  - American Society of Civil Engineers
KW  - Asphalt
KW  - Bituminous binders
KW  - Bituminous materials
KW  - Characterization
KW  - Civil engineering
KW  - Conferences
KW  - Geotechnical engineering
KW  - Highways
KW  - Hunan (China)
KW  - Management
KW  - Pavement design
KW  - Pavement testing
KW  - Pavements
KW  - Paving materials
KW  - Recycled asphalt pavements
KW  - Road construction
UR  - https://trid.trb.org/view/900142
ER  - 

TY  - CONF
AN  - 01140867
AU  - Zhou, ChengHan
AU  - Wang, WeiDong
AU  - American Society of Civil Engineers
TI  - Highway Bridge Construction Process Simulation Base on 4D Visualization
SN  - 9780784410424
PY  - 2009
SP  - pp 138-145
AB  - It is very important that 4D visualization technology is applied in bridge construction management since traditional tools of construction management cannot present intuitive construction progress. This study established a 4D simulation model for bridge construction management by integrating the construction schedule and resource consumption progress with the bridge 3D model. Based on this model, a 4D simulation system of bridge construction was developed. With this system, a dynamic simulation of bridge construction schedule and resource requirements were realized, which make it more convenient for the users to forecast and inquire construction progress and resource consumption intensively in a visual environment. In brief, it realized visualization management and control in bridge construction. The Bridge Construction 4D Simulation System was applied in the construction management of DaWu River Bridge, a 340m pre-stressed concrete continuous rigid frame bridge.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bridge construction
KW  - Construction management
KW  - Four dimensional models
KW  - Highway bridges
KW  - Processes
KW  - Simulation
KW  - Technology
KW  - Visualization
UR  - https://trid.trb.org/view/900772
ER  - 

TY  - CONF
AN  - 01140865
AU  - Jamnongpipatkul, Pichit
AU  - Dechasakulsom, Montri
AU  - Sukolrat, Jiraroth
AU  - American Society of Civil Engineers
TI  - Application of Air Foam Stabilized Soil for Bridge-Embankment Transition Zone in Thailand
SN  - 9780784410424
PY  - 2009
SP  - pp 181-193
AB  - Large settlement is a problem of most highway bridge approaches constructed in the lower Choa Phraya river basin of the Kingdom of Thailand. The presence of thick and highly compressible soft clay layer in these areas usually results in differential settlement between bridge superstructures and highway embankments. Moreover, it also affects driving comfort of the traveling public. There are many alternatives that can be used to prevent the vertical movement, and use of lightweight material is one of the alternatives. Recently, Thailand's department of highways (DOH) has initiated a project for use of light weight soil to reduce settlement under bridge approaches. The test section was located on highway number 35, at the kilometer post of 72+712.5 to 72+775.0. Geotechnical instrumentation was also installed at the tested site for material behavior study.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Bridge approaches
KW  - Clay soils
KW  - Embankments
KW  - Foamed materials
KW  - Geotechnical engineering
KW  - Settlement (Embankments)
KW  - Soil stabilization
KW  - Thailand
UR  - https://trid.trb.org/view/900800
ER  - 

TY  - CONF
AN  - 01140861
AU  - Chen, Chien-Ta
AU  - Hung, Ching-Tsung
AU  - Yeh, Ming-Chin
AU  - Lin, Jyh-Dong
AU  - American Society of Civil Engineers
TI  - A Study of the Cost Analysis of the Porous Pavement on a Freeway
SN  - 9780784410424
PY  - 2009
SP  - pp 166-172
AB  - Porous pavement performances are better than traditional pavements, but for some reasons which include the higher cost and complex construction techniques, porous asphalt is not widely used in Taiwan. Therefore, the concept of LCCA (Life Cycle Cost Analysis) is introduced in this study in order to analyze the cost required by different kinds of porous pavements. HDM-4 related parameters were first used to estimate the service life of porous pavement. As a result, the different types of porous pavements and asphalt pavement thickness showed different degrees of service life results. Type III of polymer modified asphalt concrete (conforming to CNS 14184 requirement) with asphalt pavement thickness 2.5 cm had the longest service life. The results of LCCA also indicates- that type III of polymer modified asphalt concrete 2.5 cm has the lowest cost, but is still more expensive than “Open-Graded Asphalt Friction Course.” For the sake of cost, therefore, the traditional friction course is still a better option.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Asphalt
KW  - Freeways
KW  - Friction course
KW  - Life cycle costing
KW  - Pavements
KW  - Porous materials
KW  - Service life
KW  - Taiwan
UR  - https://trid.trb.org/view/900790
ER  - 

TY  - CONF
AN  - 01140857
AU  - Levenberg, Eyal
AU  - American Society of Civil Engineers
TI  - Backcalculation of Anisotropic Pavement Properties Using Time History of Embedded Gauge Readings
SN  - 9780784410424
PY  - 2009
SP  - pp 79-85
AB  - An instrumented asphalt pavement was built at the INDOT/Purdue accelerated pavement testing facility. The construction processes induced preferred aggregate orientation and lock-in of horizontal stresses, resulting in mechanical anisotropy. This anisotropy is investigated by means of inverse analysis. The pavement system is modeled as a linear elastic transversely-isotropic layered half-space; anisotropic properties are back-calculated using the time history of all embedded gauge readings, collected during one load pass. The experiment and analysis method are presented; results are compared with the isotropic case and discussed.
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Anisotropic materials
KW  - Asphalt pavements
KW  - Backcalculation
KW  - Embeddable instruments
KW  - Measuring instruments
KW  - Time history
UR  - https://trid.trb.org/view/900273
ER  - 

TY  - CONF
AN  - 01140853
AU  - Yang, Jun
AU  - Yin, Chaoen
AU  - American Society of Civil Engineers
TI  - Laboratory Study of Porous Asphalt Mixture Made with Rubber Bitumen
SN  - 9780784410424
PY  - 2009
SP  - pp 22-31
AB  - A porous asphalt mix was designed with high viscosity modified bitumen and rubber bitumen at an aimed air void content of 20%. A Hamburg wheel tracking device was employed to test rutting potentials in both 60°C air bath and 40°C water bath conditions. Triaxial compression tests and triaxial cyclic compression tests were performed to determine the resistance to shear stress and permanent deformation at 60°C. The study results show that despite the similar rheological behavior between rubber bitumen and high viscosity modified bitumen, rubber bitumen is far less applicable than high viscosity modified bitumen in the aspect of high temperature performance and shear resistance. However, the rubber asphalt mixture shows a longer creeping stage and a stiffer resilient modulus in cyclic loading and lower level. Under the conditions defined herein, porous asphalt made with rubber bitumen can only be used for lighter volume of traffic
U1  - GeoHunan International Conference: Challenges and Recent Advances in Pavement Technologies and Transportation GeotechnicsAmerican Society of Civil EngineersAsphalt InstituteCentral South University, ChinaFederal Highway AdministrationTransportation Research BoardTexas Transportation InstituteTexas Department of TransportationChongqing Jiaotong University, ChinaDeep Foundation InstituteHunan UniversityInternational Society for Asphalt PavementsJiangsu Transportation Research InstituteKorea Institute of Construction TechnologyKorean Society of Road EngineersChinese Society of Pavement EngineeringChangsha,Hunan,China StartDate:20090803 EndDate:20090806 Sponsors:American Society of Civil Engineers, Asphalt Institute, Central South University, China, Federal Highway Administration, Transportation Research Board, Texas Transportation Institute, Texas Department of Transportation, Chongqing Jiaotong University, China, Deep Foundation Institute, Hunan University, International Society for Asphalt Pavements, Jiangsu Transportation Research Institute, Korea Institute of Construction Technology, Korean Society of Road Engineers, Chinese Society of Pavement Engineering
KW  - Laboratory studies
KW  - Loads
KW  - Porous materials
KW  - Rubberized bitumen
KW  - Rutting
KW  - Traffic volume
UR  - https://trid.trb.org/view/900223
ER  -