TRB’s National Cooperative Highway Research Program (NCHRP) Report 746: Traffic Enforcement Strategies for Work Zones presents guidance for the safe and effective deployment of traffic enforcement strategies in work zones on high-speed highways (those with speed limits of 45 mph or greater). The report discusses the planning, design, and operation of traffic enforcement strategies, as well as a...

TRB’s National Cooperative Highway Research Program (NCHRP) Web-Only Document 194: Traffic Law Enforcement in Work Zones: Phase II Research is contractor’s final report providing background information for the project that produced NCHRP Report 746 Traffic Enforcement Strategies for Work Zones. NCHRP Report 746 presents guidance for the safe and effective deployment of traffic enforcement strat...

TRB’s Safety Innovations Deserving Exploratory Analysis (IDEA) Program Final Report for Safety-IDEA Project 18: DRIVE-SMART Driver Monitoring and Crash Risk Mitigation System describes the development and testing of a driver monitoring and crash risk mitigation system.

TRB’s Innovations Deserving Exploratory Analysis (IDEA) annual program announcement solicits funding proposals for the upcoming review cycles.  The announcement explains the IDEA programs, describes the types of eligible projects and their funding structures, suggests general areas for which IDEA proposals can be submitted, and provides guidelines and forms for submitting proposals. NCHRP ...

TRB’s second Strategic Highway Research Program (SHRP 2) Reliability Project L32A has released a prepublication, non-edited version of a final report titled Train-the-Trainer Pilot Courses for Incident Responders and Managers that describes pilot tests of the national traffic incident management train the trainer course, the course's revised and finalized curriculum, and an evluation of it...

On May 3, 2013, TRB’s Committee on the Long-Term Stewardship of Safety Data from the Second Strategic Highway Research Program (SHRP 2) sent its first letter report to Victor Mendez, administrator of the Federal Highway Administration; David Strickland, administrator of the National Highway Traffic Safety Administration; and Bud Wright, executive director of the American Association of State Hi...

TRB’s second Strategic Highway Research Program (SHRP 2) Reliability Project L05 has released a prepublication, non-edited version of a final report titled Incorporating Reliability Performance Measures into the Transportation Planning and Programming Processes that reviews domestic and international literature describing current research and practical use of travel-time reliability in transpor...

TRB’s second Strategic Highway Research Program (SHRP 2) Reliability Project L05 has released a prepublication, non-edited version of a report titled Guide to Incorporating Reliability Performance Measures into the Transportation Planning and Programming Processes that is designed to help planning, programming, and operations managers to apply the concept of travel-time reliability to balance i...

TRB’s second Strategic Highway Research Program (SHRP 2) Reliability Project L05 has released a prepublication, non-edited version of a report titled Guide to Incorporating Reliability Performance Measures into the Transportation Planning and Programming Processes: Technical Reference provides a “how-to” guide for technical staff to select and calculate the appropriate performance measures to s...

TRB’s second Strategic Highway Research Program (SHRP 2) has released a project brief that summarizes the results of SHRP 2 Renewal Project R15B: Identification of Utility Conflicts and Solutions Project, which explored best practices on the use of utility conflict matrices (UCM), developed and tested a standardized UCM concept, and developed training materials and implementation guidelines on ...

TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 442: Practices and Performance Measures for Local Public Agency Federally Funded Highway Projects explores what performance measures, delivery practices, strategies, and tools are currently used in relation to federally-funded local public agency (LPA) highway project development and delivery, and how they are used to measure...

TRB’s second Strategic Highway Research Program (SHRP 2) Reliability Project L14 has released a prepublication, non-edited version of a report titled Effectiveness of Different Approaches to Disseminating Traveler Information on Travel Time Reliability that provides recommendations on appropriate ways to introduce and provide travel time reliability information to travelers so that such in...

TRB’s second Strategic Highway Research Program (SHRP 2) Reliability Project L14 has released a prepublication, non-edited version of a report titled A Lexicon for Conveying Travel Time Reliability Information that includes a glossary of terms designed to convey travel time reliability information to travelers so that such information can be understood and used in a way that ...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 745: Left-Turn Accommodations at Unsignalized Intersections presents guidance for the selection and design of left-turn accommodations at unsignalized intersections. The report includes 11 case studies of typical situations that illustrate the use of the guidance. NCHRP Web-Only Document 193 : Development of Left-Turn Lane Warra...

TRB’s National Cooperative Highway Research Program (NCHRP) Web-Only Document 193: Development of Left-Turn Lane Warrants for Unsignalized Intersections provides background on the development of NCHRP Report 745 : Left-Turn Accommodations at Unsignalized Intersections.

TRB’s second Strategic Highway Research Program (SHRP 2) Reliability Project L02 has released a prepublication, non-edited version of a report titled Establishing Monitoring Programs for Travel Time Reliability that describes what reliability is and how it can be measured and analyzed. SHRP Reliability Project L02 also produced a report titled  Guide to Establishing Monitoring Programs for...

TRB’s second Strategic Highway Research Program (SHRP 2) Reliability Project L02 has released a prepublication, non-edited version of a report titled Guide to Establishing Monitoring Programs for Travel Time Reliability that describes how to develop and use a Travel Time Reliability Monitoring System (TTRMS). The report also explains why such a system is useful, how it helps agencies do a bette...

TRB’s second Strategic Highway Research Program (SHRP 2) Report S2-R06E-RR-1: Real-Time Smoothness Measurements on Portland Cement Concrete Pavements During Construction explores real-time smoothness measuring technologies for concrete paving. For the purposes of the report, real-time smoothness refers to measuring and evaluating the concrete pavement surface profile during construction along t...

TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 441: High Performance Concrete Specifications and Practices for Bridges documents the types of specifications and practices used by state transportation agencies to produce high performance concrete for bridges. The report also identifies specifications and practices reported as having improved concrete performance and t...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 744: Fuel Usage Factors in Highway and Bridge Construction includes fuel usage factors for work items in the construction and maintenance of highways and bridges. The report includes the Price Adjustment Calculator Tool, a Microsoft Excel® spreadsheet, designed to assist in the calculation of payment adjustments for construction...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2280 consists of 20 papers that explore setting variable speed limits; hard highway shoulder running; computer vision-based safety evaluations; safety intervention models; safety effectiveness of Super 2 highways; crash occurrence, mountainous freeway geometry, weather, and traffic data; real-time safety eva...

TRB’s second Strategic Highway Research Program (SHRP 2) Report S2-R06B-RW-1: Evaluating Applications of Field Spectroscopy Devices to Fingerprint Commonly Used Construction Materials documents evaluation results of practical, portable spectroscopic equipment for in-situ analysis of a wide range of commonly used construction materials. The report also includes proposed American A...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2324 consists of 15 papers that explore intervehicle safety warning information systems; travel time prediction; intersection decision support in adverse weather conditions; creation of CityMobil; real-time freeway end-of-queue alerting systems; traffic incident detection; vehicle class-specific route guidan...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2316 consists of 15 papers that explore gap acceptance behavior; driving behavior in emergency situations; driver anticipation; phase transition models; integrated lane change models; models for pedestrian-vehicle interactions at road crossings; midblock pedestrian crossings; exit choice decisions during ped...

TRB’s National Cooperative Highway Research Program (NCHRP) Web-Only Document 198: Sag Vertical Curve Design Criteria for Headlight Sight Distance reviews the current methodologies used in the design of sag vertical curves and changes in headlamp technologies. The report also highlights potential changes to the American Association of State Highway and Transportation Officials (AASHTO) design g...

TRB’s second Strategic Highway Research Program (SHRP 2) SHRP 2 Report S2-R04-RR-2: Innovative Bridge Designs for Rapid Renewal: ABC Toolkit describes standardized approaches to designing and constructing complete bridge systems for rapid renewals. The report includes design standards and design examples for complete prefabricated bridge systems, and proposes specification language for accelera...

TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 443: Practical Highway Design Solutions presents information on the application of practical design approaches in roadway project development. Practical design is the default term used in the report to describe approaches or initiatives some state transportation agencies have adopted that result in design solutions for specif...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2317 consists of 16 papers that explore the impact of bus rapid transit systems on road safety; busway design; buses as low-carbon mobility solution; motorized vehicle purchases; car ownership policies in megacities; models of auto and motorcycle ownership and mode choice; and the characteristics of mixed tr...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2308 consists of 20 papers that explore patterns of use of transport modes; regional traffic congestion; the detection layout problem; multisensor data integration and fusion; commuters' demographic characteristics; average travel time estimates; short-term travel time prediction; vehicle reidentification an...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 743: Predicting the Initial Retroreflectivity of Pavement Markings from Glass Bead Quality describes a laboratory test method to predict the initial retroreflectivity of pavement markings in the field based on the quality of the applied glass beads.