Cooperative Research Programs Series
Periodicals and Other Documents
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TRB Weekly
TRB Weekly is a free weekly email newsletter designed to keep you up-to-date on TRB activities and to highlight select transportation research-related activities taking place at the federal and state levels, and within the academic and international transportation communities. Subscribe to have the latest version delivered to your inbox.
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Send comments or questions about TRB Weekly to trbnews@nas.edu. TRB highlights external reports and publications that are available online
without a fee and are published within the past 60 days. TRB is not able
to highlight external journal or web articles, events that are not sponsored or
cosponsored by TRB, or promotional materials.
Select from the list below to view this year and last year's TRB Weekly.
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TRB Weekly covers the latest in transportation research.
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Honor excellence in the transportation industry! Nominate a candidate for one or all of some of TRB's most prestigious awards:
Submit your nomination by July 31.
- The quality of research presented at the 2027 TRB Annual Meeting depends on reviewers. All reviewers must update their profiles with the revised classification system by August 1. This is part of broader changes intended to improve reviewer assignment. Watch a one-minute video guide to complete this step.
- Prepare in advance to avoid desk rejection for your TRB Annual Meeting paper submission. Desk rejection criteria have been clarified and will be applied consistently. Please review the “Criteria for Desk Rejection” in the instructions for authors along with other new requirements before submitting.
- If you plan to use generative AI and/or Large Language Model tools like ChatGPT to prepare your paper, be sure to review updated guidelines. Authors are fully responsible for the content of their manuscript, and must be transparent in disclosing how an AI tool was used and which tool was used.
- Submit your paper for presentation by August 1! Submissions still in progress after August 1 will be removed. Successful submissions receive a paper number and confirmation email. Contact TRBAMPapers@nas.edu with questions about submissions.
- If you'll be entering the United States to attend the TRB Annual Meeting in Washington, D.C. on January 11 - 15, 2026, now is a great time to begin the visa application process! Approvals can take time and requirements may have changed.
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Real-time data can dynamically adjust speed limits and provide hazard alerts, reducing crashes, preventing congestion, and enhancing roadway efficiency overall. TRB's NCHRP Research Report 1176: Real-Time Warnings and Variable Speed Limits: Safety and Travel Reliability During Weather Events from the National Cooperative Highway Research Program supports professionals using these systems to make the roads safer. The report outlines institutional roles and responsibilities, operational considerations, and message efficacy provide high-level strategies and a step-by-step framework for deploying these valuable tools.
Surveys about use of the tools consistently found a positive impact on driver behavior and roadway safety. For instance, in Utah crash rates dropped by nearly 50 percent after variable speed limits were implemented. Machine learning models predicted a potential crash frequency reduction of up to 80 percent when enhanced signage and system responsiveness were in place.
Find a slide deck with an overview of the research and results, a practical implementation plan, along with details about the literature review, survey, interviews, and analysis behind the report in NCHRP Web-Only Document 447: Evaluating the Impacts of Real-Time Warnings and Variable Speed Limits on Safety and Travel Reliability During Weather Events.
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Where can a student design competition lead? All the way to the Moon. The latest issue of TR News highlights how the Airport Cooperative Research Program (ACRP) University Design Competition helped launch NASA engineer Jason Endsley's career—from developing an award-winning airport innovation as a graduate student to supporting the historic Artemis II mission's splashdown and recovery.
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July 12 - 15 - TRB's 65th annual Workshop on Transportation Law in Irvine, CA
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July 20 - TRB Webinar: Digital Twins for Structural Testing and Predictive Evaluation
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July 22 - Join a committee meeting of the National Academies Overall Aircraft Cabin Air Quality study. Representatives from flight crew unions will speak with the committee on the impact of smoke or fume events on passenger aircraft cabins. Public comments may also be submitted in writing during the session.
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July 22 - TRB Webinar: Supporting State DOT Adoption of Knowledge Management Practices
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July 30 - TRB Webinar: Applying Ground Modification Methods for Highway Structures
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Suggest developing research that help agencies, attorneys, policymakers, and industry professionals address emerging legal, regulatory, governance, and operational public transportation challenges. TRB's TCRP legal research document covers topics like procurement, ADA compliance, labor and workforce issues, data privacy, and emerging technologies. This is your chance to request the research you need! Submit a problem statement by September 15.
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