Roundabouts have seen unprecedented growth across the United States, from just a handful a decade ago to more than 2,000 and counting. National guidance had to keep pace with the needs of states and communities planning and implementing roundabouts, and NCHRP took a lead role.

In regions across the nation, bridge engineers know that the next major seismic event is coming—maybe tomorrow, maybe centuries from now. DOTs have the critical charge of designing for earthquakes and protecting the lives of travelers.

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2264 consists of 20 papers that explore automatic pedestrian detectors; infrared-based automatic pedestrian sensor data; sign visibility for pedestrians; advance yield markings; multiobjective optimization of signal timings for two-stage, midblock pedestrian crosswalk; and signal-based countermeasures for pe...

TRB’s Airport Cooperative Research Program (ACRP) Report 37A: Guidebook for Measuring Performance of Automated People Mover Systems at Airports is designed to help measure the performance of automated people mover (APM) systems at airports. The guidebook identifies, defines, and demonstrates application of a broad range of performance measures encompassing service availability, safety, operatio...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2247 consists of 18 papers that explore estimating bicycle intersection volumes, uniform vehicle code and state statutes governing bicycling, riding locations, exposure of bicyclists to traffic-related particulate matter, China’s Hangzhou public bicycle program, temporal trends and impact of weather on cycli...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2250 consists of 10 papers that examine detection distances to crosswalk markings, malfunction flash mode policies and practice, safety effectiveness of actuated advance warning systems, an advance LED warning system for rural intersections, in-lane pavement markings in advance of freeway interchanges, ...

TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 414: Effective Delivery of Small-Scale Federal-Aid Projects examines streamlined methods for meeting federal funding requirements for small-scale highway projects. The report explores ways that state departments of transportation work with local agencies to implement small projects eligible for federal funding. Appendix G to ...

The fifth edition of the Highway Capacity Manual (HCM2010), which updates HCM2000, will significantly enhance how engineers and planners assess the traffic and environmental effects of highway projects.  Order your copy of the HCM 2010 today and it will be shipped within 24 hours. Rush order received by 12:00 p.m. Eastern will be shipped the same day. The HCM2010: • provides an integrated ...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2196 contains 19 papers that explore a new algorithm for the static user equilibrium traffic assignment problem, evacuation network modeling, multiobjective optimization for multimodal evacuation, constructing transit origin-destination tables from fragmented data, the impact of variations in travel demand a...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2198 contains 17 papers incorporating bicycle and pedestrian topics in university transportation courses, high-visibility school crosswalks, safety effectiveness of leading pedestrian intervals, driver and pedestrian behavior at uncontrolled crosswalks, pedestrian traffic flow in confined passageways, roadwa...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2193 contains 16 papers that explore bus rapid transit systems; pedestrian safety at midblock crossings; pedestrian safety at signalized intersections; urban transport policies; spatial and social characteristics of urban transportation; motorization case study; modeling private car ownership; linking travel...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2197 contains 14 papers that explore the vehicle routing problem for emissions minimization; allocating departure time slots to optimize dynamic network capacity; optimal all-stop, short-turn, and express transit services under heterogeneous demand; railway capacity model and decision support process for str...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2190 contains 6 papers that explore the influence of the built environment on route selection for bicycle and car travel; automated bicycle counts; multimodal travel choices of bicyclists; effects of gender on commuter cycling and accident rates; on-street bicycle facility configuration effects on bicyclist ...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 674: Crossing Solutions at Roundabouts and Channelized Turn Lanes for Pedestrians with Vision Disabilities explores information related to establishing safe crossings at roundabouts and channelized turn lanes for pedestrians with vision disabilities. Appendices B through N to NCHRP Report 674 were published as NCHRP Web-Only Doc...

TRB’s National Cooperative Highway Research Program (NCHRP) Web-Only Document 160 includes appendices B through N to NCHRP Report 674 : Crossing Solutions at Roundabouts and Channelized Turn Lanes for Pedestrians with Vision Disabilities, which explores information related to establishing safe crossings at roundabouts and channelized turn lanes for pedestrians with vision disabilities. App...

TRB’s National Cooperative Highway Research Program (NCHRP) Web-Only Document 150: Accessible Pedestrian Signals: A Guide to Best Practices (Workshop Edition 2010) provides an introduction to accessible pedestrian signals (APS) and highlights issues related to the design, installation, operation, and maintenance of APS. The report also addresses public education, U.S. case studies, and internat...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2173 contains 16 papers that explore the effects of wait time and rain intensity on driver left-turn gap acceptance behavior, left turns from major streets with shared short lanes at two-way stop-controlled intersections, level of service, arrival flow profiles and platoon dispersion for urban street segment...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 670: Recommended Procedures for Testing and Evaluating Detectable Warning Systems explores a set of recommended test methods for evaluating the durability of detectable warning systems. These methods address exposure regimes, test procedures, and evaluation criteria to help select detectable warning systems that provide long-ter...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2156 includes 18 papers that explore car ownership among young adults, time-dependent utility in activity and travel choice behavior, probit-based discrete-continuous model of activity choice, strategic thinking and risk attitudes in route choice, the impact of immigrant status on household auto ownership, e...

TRB’s Airport Cooperative Research Program (ACRP) Report 37: Guidebook for Planning and Implementing Automated People Mover Systems at Airports includes guidance for planning and developing automated people mover (APM) systems at airports. The guidance in the report encompasses the planning and decision-making process, alternative system infrastructure and technologies, evaluation techniques an...

TRB’s Transit Cooperative Research Program (TCRP) Report 95: Traveler Response to Transportation System Changes, Chapter 19 – Employer and Institutional TDM Strategies pair-uses wise comparisons to explore the relative importance of particular categories of TDM strategies, such as support versus incentives, as well as the particular strategies themselves, such as transit subsidy versus a high-o...

A photo essay in the March-April issue of the TR News documents sessions, workshops, special events, poster presentations, awards, exhibits, committee meetings, and networking at TRB’s 89th Annual Meeting in Washington, D.C., January 10–14, 2010, including a speech by U.S. Secretary of Transportation Ray LaHood and panel discussions with U.S. Department of Transportation leaders.

TRB’s National Cooperative Highway Research Program (NCHRP) Web-Only Document 158: Field Test Results of the Multimodal Level of Service Analysis for Urban Streets (MMLOS) explores the result of a field test of the MMLOS in 10 metropolitan areas in the United States. NCHRP Web-Only Document 158 represents the third and final phase of a project that included development of NCHRP Report 616 ...

TRB’s National Cooperative Highway Research Program (NCHRP) Legal Research Digest 53: Liability Aspects of Bikeways explores the liability of public entities for bicycle accidents on bikeways as well as on streets and highways. The report also examines the federal laws that encourage the designation and use of bikeways; the elements of a claim in tort against a public entity for a bicycle accid...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2140 includes 24 papers that explore counting pedestrians at intersections; estimating pedestrian intersection crossing volumes; automatic pedestrian detection device and smart lighting; impact of weather and season on pedestrian traffic volumes; automated analysis of pedestrian–vehicle conflicts using video...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2137 includes 16 papers that cover transportation safety management, emergency evacuation and services, the security and mobility of intermodal freight networks, and various aspects of school transportation.

TRB’s Transit Cooperative Research Program (TCRP) Report 137: Improving Pedestrian and Motorist Safety Along Light Rail Alignments examines pedestrian and motorist behaviors contributing to light rail transit (LRT) safety and explores mitigating measures available designed to improve safety along LRT alignments. The report also includes suggestions to facilitate the compilation of accident data...

TRB’s Transit Cooperative Research Program (TCRP) Web-Only Document 42: Selected Appendices for TCRP Report 137: Improving Pedestrian and Motorist Safety Along Light Rail Alignments contains appendices B through E of TCRP Report 137. TCRP Report 137 examines pedestrian and motorist behaviors contributing to light rail transit safety, explores mitigating measures available designed to impro...

TRB’s National Cooperative Highway Research Program (NCHRP) Report 641: Guidance for the Design and Application of Shoulder and Centerline Rumble Strips explores the design and application of shoulder and centerline rumble strips as a crash reduction measure, while minimizing adverse effects for motorcyclists, bicyclists, and nearby residents.

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2103 includes 13 papers that explore calibration of the Highway Safety Manual's accident prediction model for a secondary road network, speed and safety, accident modification functions, elementary units of exposure, identifying crash hot spots, and safety of lane and shoulder width combinations on rural roa...