The March-April 2012 issue of the TR News includes a photo essay that documents sessions, workshops, special events, poster presentations, awards, exhibits, committee meetings, and other highlights of TRB’s 91st Annual Meeting in Washington, D.C., January 22-26, 2012.

The March-April 2012 TR News includes a photo essay of highlights from the TRB 91st Annual Meeting's sessions, speakers, events, committee meetings, exhibits, awards, and more.  This issue of the TR News also features articles on the growing role of international cooperation and collaboration in TRB programs and activities; key findings from two recent National Cooperative Highwa...

A slideshow summary of the Transportation Research Board's pre- and post-September 11, 2001, transportation security activities is updated monthly.

Since September 11, 2001, 125 security-, emergency management-, and infrastructure protection-related planning and implementation projects have been initiated through the Transportation Research Board (TRB). Ninety-two of these projects have been completed; 15 projects are in progress; and 18 projects have contracts pending or are currently in development. This report, updated monthly, provides...

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.

On March 16, 2012, TRB’s Long-Term Bridge Performance (LTBP) Committee sent its first letter report to Victor Mendez, administrator of the Federal Highway Administration (FHWA). The committee provides advice and assistance on the conduct of the LTBP program, which is designed to collect research-quality data on a large representative sample of in-service U.S. highway bridges and to analyze thes...

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 Safety Innovations Deserving Exploratory Analysis (IDEA) program has released its annual report, which summarizes projects active or completed during the 2011 program year. The report also includes descriptions of projects completed before the 2011 program year. The  Safety IDEA program is sponsored by the Federal Motor Carrier Safety Administration and the Federal Railroad Admi...

TRB’s National Cooperative Highway Research Program (NCHRP) Web-Only Document 186: The Superpave Mix Design System: Anatomy of a Research Program describes how the original Strategic Highway Research Program (SHRP) effort was conceived, funded, and managed. The report outlines the research and implementation efforts that brought SHRP products into routine use and summarizes some of the key less...

TRB’s Committee on Implementing the Research Results of the Second Strategic Highway Research Program (SHRP 2) has released its first letter report to Victor Mendez, administrator of the Federal Highway Administration (FHWA), and John Horsley, executive director of the American Association of State Highway and Transportation Officials (AASHTO). The committee’s first report includes recommendati...

Travel training services may offer public transportation agencies an alternative to providing increasingly costly paratransit service to customers with disabilities. Research to understand the outcomes and financial implications of travel training services, however, has been scant. To address this issue, a cost–benefit model was tested to measure the value that travel training services can prov...

A March 5, 2012, letter report from TRB's Research and Technology Coordinating Committee (RTCC) to the U.S. Federal Highway Administration (FHWA) addresses the agency’s Research, Development, and Technology program priority setting, management, and performance measurement. The RTCC’s charge is to monitor and review FHWA’s research and technology activities and advise FHWA on the setting of a re...

The January-February 2012 TR News includes a roundup of findings from TRB’s 2011 state partnership visits program—trends, problem-solving approaches, and emerging research needs and applications at transportation agencies throughout the country. In addition, the January-February issue of the TR News assembles feature articles that examine workforce management, including a practical toolkit...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2259 consists of 24 papers that explore traffic signal control, arterial offset optimization, coordination of arterial traffic signal, arterial signal phases and progression quality, coordinated system operation, the benefit of retiming traffic signals, modeling variability of urban travel times, intelligent...

TRB’s second Strategic Highway Research Program (SHRP 2) has released a Reliability Products Brief, which summarizes the status of products being produced within the Reliability area of SHRP 2. Reliability research in SHRP 2 addresses the root causes of unpredictable travel times by focusing on highway system operations. Travel time reliability, which is valued for many reasons, is co...

TRB’s second Strategic Highway Research Program (SHRP 2) has released a Renewal Products Brief, which summarizes the status of products being produced within the Renewal area of SHRP 2. The goal of Renewal research in SHRP 2 is to advance the methods and materials that transportation agencies can use to renew the nation’s vital but aging highway system even as we continue to use and live n...

TRB’s second Strategic Highway Research Program (SHRP 2) has released a Safety Projects Brief, which summarizes the status of products being produced within the Safety area of SHRP 2. Safety research in SHRP 2 will apply advanced technologies to understand how drivers interact with and adapt to a variety of factors—the vehicle, the traffic, the roadway characteristics, traffic control...

TRB’s second Strategic Highway Research Program (SHRP 2) has released a Capacity Projects Brief, which summarizes the status of products being produced within the Capacity area of SHRP 2. The objective of Capacity Research in SHRP 2 is to develop tools for systematically integrating environmental, economic, and community requirements into the analysis, planning, and design of new highway c...

TRB’s Transportation Research Record: Journal of the Transportation Research Board, No. 2254 consists of 18 papers that explore behavioral foundation of route choice and traffic assignment, the information matrix in mixed logit models estimation, design features of activity-based models, dynamic activity generation models, and the underlying distributional assumption in nested logit models. Thi...

TRB’s National Cooperative Highway Research Program (NCHRP) Research Results Digest 370: Guidelines for Project Selection and Materials Sampling, Conditioning, and Testing in WMA Research Studies summarizes a May 2011 workshop designed to help foster cooperation and coordination among warm-mix asphalt (WMA) research studies. The goals of the workshop were to help identify the laboratory and fie...

TRB’s second Strategic Highway Research Program (SHRP 2) has released a report that provides an analysis plan for the SHRP 2 Naturalistic Driving Study (NDS) to help guide the development of Project S08, Analysis of In-Vehicle Field Study Data and Countermeasure Implications, and to help assist researchers planning to use the SHRP 2 NDS data. This publication is only available in electronic for...

The Board on Atmospheric Sciences and Climate, part of the National Academies’ Division on Earth and Life Studies (DELS), has released a report that reviews the draft 10-year strategic plan for the U.S. Global Change Research Program (USGCRP). According to the committee that produced the report, the plan, which shapes and coordinates climate and related global environmental change research effo...

TRB’s National Cooperative Highway Research Program’s (NCHRP's) U.S. Domestic Scan Program has released a report that explores the transfer of innovative technologies and practices from host states to visiting states based on the program’s first six scans. Additional information on the 19 completed or planned program scans is available on the U.S. Domestic Scan Program’s website .

TRB’s National Cooperative Highway Research Program (NCHRP) Research Results Digest 367: Continuing Project to Synthesize Information on Highway Problems is a digest of the progress and status of NCHRP Project 20-5, “Synthesis of Information Related to Highway Problems.”

TRB’s Transit Cooperative Research Program (TCRP) Research Results Digest 104: Synthesis of Information Related to Transit Problems is a digest of the progress and status of TCRP Project J-7, “Synthesis of Information Related to Transit Problems,” for which the Transportation Research Board is the agency conducting the research.

TRB’s Commercial Truck and Bus Safety Synthesis Program (CTBSSP) Research Results Digest 9: A Status Report describes the progress and status of the Commercial Truck and Bus Safety Synthesis Program (CTBSSP). CTBSSP is a cooperative research program sponsored by the Federal Motor Carrier Safety Administration (FMCSA) and administered by the Transportation Research Board. The program was authori...

TRB’s Airport Cooperative Research Program (ACRP) has released its annual report that provides background on the program, a listing of products developed under the program over the last 6 years, a summary of the status of projects in progress or completed, and more.

TRB’s Airport Cooperative Research Program (ACRP) Research Results Digest 13: Synthesis of Information Related to Airport Practices is a digest of the progress and status of ACRP Project 11-03, Synthesis of Information Related to Airport Practices.

A featured article in the November-December 2011 issue of the TR News Traffic explores the goals, the problems encountered, the solutions, and the results of the long-term pavement performance traffic data collection effort that has generated the largest repository of high-quality traffic data ever collected.

TRB’s Innovations Deserving Exploratory Analysis (IDEA) program has released the 2012 issue of its New IDEAs for Highway Systems: Annual Progress Report, which summarizes projects active or completed during the 2011 program year. The report also includes descriptions of projects completed before the 2011 program year. A project of the National Cooperative Highway Research Program (NCHRP), the&n...