NCHRP Research Report 960
January 22, 2021
Pavement recycling is a technology that can restore the service life of pavement structures and stretch available funding for pavement rehabilitation. In general, pavement recycling techniques remix the existing pavement material and reuse it in the final pavement in the form of a stabilized layer. Limitations to further widespread implementation of pavement recycling processes have been reported ...
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January 20, 2021
The November-December 2020 issue of TR News —with a cover feature on the development of a Recycled Material Web Map—is available in hard copy and digital copy for subscribers. For those who are not subscribers, the table of contents is available. Other feature articles in the issue include "Living with Transformational Technologies and Other Surprises," "Asphalt Recycling: History of Recycled Mate...
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January 07, 2021
The September–October 2020 issue of TRB's magazine is now available in full online. Themed “Embracing the Future,” the issue celebrates TRB’s centennial with articles forecasting the future of transportation. Authors present outlooks that are multimodal, creative, diverse, inclusive, and thought-provoking, offering a pause point for transportation researchers, policy makers, and practitioners as t...
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January 06, 2021
The year 2020’s raging coronavirus pandemic and reckoning with long-standing racial injustice led to widespread disruption and suffering, social unrest, and renewed calls for an accounting of our fragmented public health system and troubled history of racial inequity. The crises of 2020 transcend transportation yet also raise fundamental questions for it along with other sectors of our society and...
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January 06, 2021
The 2020 Annual Report summarizes TRB’s accomplishments in each of its major program areas and how TRB has served the nation and the global transportation professional community throughout 2020. TRB provides leadership in transportation improvements and innovation through trusted, timely, impartial, and evidence-based information exchange, research, and advice regarding all modes of transportation...
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NCHRP Research Report 950
December 03, 2020
Many transportation departments have significant practical experience with bridge preservation and have developed conclusions regarding the effectiveness of bridge preservation actions based on those experiences. However, limited efforts have been made to identify, measure, evaluate, and document the short- and long-term performance of specific bridge preservation actions. The TRB National Coopera...
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Transportation Research Circular E-C267
November 05, 2020
Coronavirus (COVID-19) has proven a formidable adversary worldwide, with tremendous impact on the United States. The transportation system is an essential element of our response to this pandemic but has also been significantly impacted across all modes, both passenger and goods movement. This environment is where research is needed most. TRB's Transportation Research Circular E-C267: Summary of T...
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October 08, 2020
Faced with ever-increasing regulatory scrutiny and a realization that traditional stormwater management approaches largely were ineffective in a transportation setting, stormwater professionals at the Alabama Department of Transportation (DOT) began to explore approaches that were outside of those prescribed by regulation and existing guidance materials. Based on these experiences, the Alabama DOT...
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Transportation Research Circular E-C266
October 07, 2020
The COVID-19 pandemic has impacted transportation agencies across the U.S. in a variety of ways. On July 15, 2020, TRB's Transportation Asset Management Committee hosted a webinar that featured executives and CEOs from state, regional, and transit agencies. Transportation Research Circular E-C266: Transportation Asset Management in a COVID-19 World captures the details of the discussion on how the...
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Transportation Research Circular E-C265
September 29, 2020
TRB hosted the Transportation Resilience 2019: 2nd International Conference on Transportation Resilience to Natural Hazards and Extreme Weather Events (TR2019) at the National Academy of Sciences Building in Washington, D.C., November 13–15, 2019. The primary purpose of TR2019 program was to present advancements made in transportation systems resilience to natural hazards, climate change, and impa...
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September 24, 2020
The Alabama Department of Transportation (DOT) incorporated post-construction stormwater management design into the overall roadway design process. The Texas DOT developed the approval process for products used in the construction of a roadway to promote vegetation. And the Virginia DOT improved the management of data associated with stormwater infrastructure best management practices to effective...
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NCHRP Web-Only Document 276
September 18, 2020
Transportation management plans (TMPs) are a set of coordinated strategies designed to help agencies achieve work zone project goals related to traffic mobility, efficient system operation, motorist and worker safety, and other operational targets. The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 276: Evaluating Strategies for Work Zone Transportation Management Plan...
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NCHRP Research Report 945
September 18, 2020
One of the ways a state department of transportation or other transportation agency can address work zone safety and other impacts is to develop and implement a transportation management plan (TMP). The TRB National Cooperative Highway Research Program's NCHRP Research Report 945: Strategies for Work Zone Transportation Management Plans provides a practitioner-ready guidebook on how to select and ...
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September 17, 2020
The July-August 2020 issue of TR News —with a focus on stormwater—is available in hard copy and digital copy for subscribers. For those who are not subscribers, the table of contents is available. Feature articles in the issue include "Integrating Stormwater Infrastructure into State Department of Transportation Processes," "Transportation Perspective on Virginia’s Nonpoint Source Nutrient Credit ...
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Critical Issues in Transportation 2019
September 17, 2020
The coronavirus (COVID-19) pandemic and equity issues will be included soon in Critical Issues in Transportation 2019 . In this report, which is updated periodically by the TRB Executive Committee, a series of challenging questions are posed to explore issues and opportunities that may arise 10 to 20 years into the future. These questions, 63 in all, have been organized into 12 topic areas ...
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September 10, 2020
Issue 326 of TRB's magazine dives into details from the TRB 99th Annual Meeting, which had a record crowd of nearly 14,000 attendees gathered January 12–16, 2020, in Washington, D.C. The March–April 2020 TR News features photo highlights from the Annual Meeting along with more coverage of the conference. TR News is TRB's bimonthly magazine featuring timely articles on innovative and state-of-the-a...
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September 02, 2020
This classic 1978 report remains highly relevant, with today's frequent extreme weather, reviews measures taken by highway agencies to mitigate the impact of adverse weather conditions. Practices related to a number of specific construction activities are discussed. The TRB National Cooperative Highway Research Program's NCHRP Synthesis 47: Effect of Weather on Highway Construction explores how ma...
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August 13, 2020
The May–June 2020 issue of TR News is a special edition illuminating the many hidden aspects of tunnels as well as the benefits of tunnel technology to modern transportation systems. Articles highlight the contribution of tunnels to the economy and how transportation operators use the best technology to keep tunnels efficient and safe.
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NCHRP Synthesis 553
July 20, 2020
Pavement warranties have been common in the United States at various points in time, coming back into favor during the 1990s. While there is no national pavement warranty standard, agencies have developed their own specifications with varying criteria. The TRB National Cooperative Highway Research Program's NCHRP Synthesis 553: Performance-Based Pavement Warranty Practices documents highway agency...
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June 25, 2020
The TRB Centennial Book is available for purchase in ebook or print format. In The Transportation Research Board, 1920–2020: Everyone Interested Is Invited , author Sarah Jo Peterson tells the story of how people and institutions created and have continued to shape TRB. In a compelling narrative accompanied by more than 150 images exploring the history of transportation and research, she argues th...
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NCHRP Synthesis 545
June 16, 2020
Collecting paper load delivery tickets at highway construction projects is an outdated practice that exposes construction inspectors to many safety hazards. State transportation agencies (STAs) have looked for decades toward automating this process through electronic ticketing, or e-ticketing. The TRB National Cooperative Highway Research Program's NCHRP Synthesis 545: Electronic Ticketing of Mate...
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NCHRP Legal Research Digest 82
June 15, 2020
Slope failures pose serious risks for state transportation agencies and federal agencies that own or maintain roads, highways, and/or adjacent property. Many transportation agencies have adopted unstable slope management programs and standards as part of a larger effort to provide an efficient and effective methodology to prevent or control landslides or rockfalls. The TRB National Cooperative Hig...
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June 03, 2020
Corrosion of steel reinforcement is the primary cause of durability problems in Reinforced- and Prestressed-Concrete (RC and PC) structures. The TRB Highway Innovations Deserving Exploratory Analysis Program's IDEA Final Report 207: MILDGLASS: GFRP Strand for Resilient Mild Pre-Stressed Concrete developed corrosion-resistant tendons for PC application that, in addition to durability and mechanical...
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NCHRP Research Report 946
May 27, 2020
In the development of a quality assurance program, a state highway agency (SHA) incorporates policies and procedures for assessing how well the materials and construction used by a contractor on a construction project satisfy the agency's specifications. The TRB National Cooperative Highway Research Program's NCHRP Research Report 946: Procedures and Guidelines for Validating Contractor Test Data ...
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May 15, 2020
Issue Number 326 of TR News magazine is available in full to subscribers. Here is a sample from the issue: a 14-page photo collage of the 99th Transportation Research Board Annual Meeting from January 12–16, 2020 in Washington, D.C. Do you see yourself in any of the photos?
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May 07, 2020
The March-April 2020 issue of TR News (#326) - including a cover feature on TRB's "century of progress and foundation for the future" of transportation research - is available in hard copy and digital copy for subscribers. For those who are not subscribers, the table of contents is available. Other feature articles in the issue include ones on whether research processes can keep up, accessible rai...
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NCHRP Research Report 935
May 05, 2020
Accelerated bridge construction (ABC) utilizes rigorous planning, new technologies, and improved methods to expedite construction. Prefabricated columns and their connections to adjoining bridge members (cap beams, footings, pile caps, and pile shafts) are the most critical components of ABC in moderate- and high-seismic regions. The TRB National Cooperative Highway Research Program's NCHRP Resear...
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April 30, 2020
Topics in the November–December 2019 issue of TR News include an analysis of the #TRBAM Annual Meeting Twitter hashtag to understand communication dynamics; climate change, a critical transportation issue; assessing, marking, and coding highway structures in emergencies; and more. This issue also kicks off the magazine’s yearlong celebration of the 100th anniversary of TRB, which will include them...
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April 06, 2020
TRB has released the final print version of TRB Special Report 312: Transportation Investments in Response to Economic Downturns that provides guidance for federal and state officials on the best ways to use stimulus funds for transportation in the future and methods for evaluating such investments. The report examines lessons learned and impacts from the states' management of the transportation c...
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April 02, 2020
One of the most time-honored of the technical activities that TRB performs, state visits revealed lots of interesting issues in 2019, including a lot around the important role state Departments of Transportation increasingly have around data needs. The TRB staff summary of the visits, each of which last one or two days and typically consist of meetings with various levels of DOT management; discus...
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