<rss version="2.0" xmlns:atom="https://www.w3.org/2005/Atom">
  <channel>
    <title>Transport Research International Documentation (TRID)</title>
    <link>https://trid.trb.org/</link>
    <atom:link href="https://trid.trb.org/Record/RSS?s=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" rel="self" type="application/rss+xml" />
    <description></description>
    <language>en-us</language>
    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
    <image>
      <title>Transport Research International Documentation (TRID)</title>
      <url>https://trid.trb.org/Images/PageHeader-wTitle.jpg</url>
      <link>https://trid.trb.org/</link>
    </image>
    <item>
      <title>2025 Cooperative Research Programs Annual Report</title>
      <link>https://trid.trb.org/View/2656285</link>
      <description><![CDATA[The 2025 Cooperative Research Programs Annual Report highlights progress and provides an overview of the National Cooperative Highway Research Program (NCHRP), Transit Cooperative Research Program (TCRP), Airport Cooperative Research Program (ACRP), and the Behavioral Traffic Safety Cooperative Research Program (BTSCRP). In addition, the report outlines the Cooperative Research Program's history and structure, mission and vision, ongoing process improvement initiatives, and research themes or focus areas. For each research program information includes: oversight committee members; program history and mission; program financial report; role of sponsors/funding agencies; accomplishments and updates; current and pending projects with contract amount, status, start and end dates; and program publications.]]></description>
      <pubDate>Wed, 21 Jan 2026 10:46:07 GMT</pubDate>
      <guid>https://trid.trb.org/View/2656285</guid>
    </item>
    <item>
      <title>NCHRP Research Report 1093 and NCHRP Research Report 1088: Playbook for Implementing Effective Emergency Management</title>
      <link>https://trid.trb.org/View/2593751</link>
      <description><![CDATA[Guidance on state department of transportation (state DOT) emergency management is available in several recent National Cooperative Highway Research Program (NCHRP) research reports. NCHRP Research Report 1093: An Emergency Management Playbook for State Transportation Agencies and NCHRP Research Report 1088: State DOT Models for Organizing and Operating Emergency Response: A Guide, both published in 2023, cover how transportation agencies are structured and who they deploy to respond to a range of emergencies. The playbook, Report 1093, is an actionable guide to help state DOTs improve their full emergency preparedness program, based on effective approaches from agency experiences. It provides guidance on ways to work smart and ideas on how to address gaps, contingencies, or new hazards. Resources in the playbook include key questions to ask before, during, and after an emergency event, overviews of damage assessment, communication, and other available tools, and an emergency management capability self-assessment tool. The guide, Report 1088, identifies organizational and operational models for state DOT emergency management and response across three broad functions: governance, programmatic and planning support, and response. Within these three functions, subcategories present a range of viable options, with pros and cons, state DOT examples, and keys for success.]]></description>
      <pubDate>Tue, 07 Oct 2025 13:15:21 GMT</pubDate>
      <guid>https://trid.trb.org/View/2593751</guid>
    </item>
    <item>
      <title>New IDEAs for Highway Systems: Annual Progress Report</title>
      <link>https://trid.trb.org/View/2548672</link>
      <description><![CDATA[This annual report presents a summary of progress on investigations conducted as part of the Innovations Deserving Exploratory Analysis (IDEA) program for the National Cooperative Highway Research Program (NCHRP). The Highway IDEA program is jointly funded by the state highway agencies through membership in the American Association of State Highway and Transportation Officials. Highway IDEA is one of three IDEA programs managed by the Transportation Research Board (TRB) to foster innovation in highway and intermodal surface transportation systems. Highway IDEA nurtures new concepts for technologies, methods, and processes for application to highway systems in broad technical areas such as highway design and construction, materials, operations, and maintenance. Section 1 of this report presents short descriptions of projects completed before the 2024 program year. The products and results from these projects have been applied or are available for further investigation for application to highway practice. The product status is described under each project. Because of limitations on IDEA resources, not all IDEA concepts that prove feasible can be accommodated for follow-up funding by the Highway IDEA program for product transfer. Section 2 presents reports of investigations on projects active or completed during the 2024 program year; several projects in this section are in the initial stages of investigation. Section 3 presents IDEA projects performed under a cost-sharing initiative with the National Science Foundation, which is no longer active.]]></description>
      <pubDate>Sat, 03 May 2025 16:36:17 GMT</pubDate>
      <guid>https://trid.trb.org/View/2548672</guid>
    </item>
    <item>
      <title>NCHRP Research Report 1051: Connected and Automated Vehicles in Work Zones: Are Transportation Agencies Ready?</title>
      <link>https://trid.trb.org/View/2485228</link>
      <description><![CDATA[This brief article is partially derived from National Cooperative Highway Research Program (NCHRP) Research Report 1051: Preparing Transportation Agencies for Connected and Automated Vehicles in Work Zones. The research goals were to: (1) identify the technical needs and potential impacts of connected and automated vehicles (CAVs) in work zones, while also considering the impact of work zones on CAVs; (2) document deployed and planned practices for CAVs in work zones; (3) evaluate the qualitative and quantitative benefits of these practices (e.g., return on investment, improved safety, mobility, and user–worker awareness); (4) identify research needed to address gaps in implementing various CAV practices; and (5) educate stakeholders on research findings through webinars and other materials.]]></description>
      <pubDate>Tue, 07 Jan 2025 17:24:33 GMT</pubDate>
      <guid>https://trid.trb.org/View/2485228</guid>
    </item>
    <item>
      <title>NCHRP Synthesis 610: When Disaster Strikes: Social Media Use by State Transportation Agencies</title>
      <link>https://trid.trb.org/View/2485229</link>
      <description><![CDATA[This brief article includes highlights from National Cooperative Highway Research Program (NCHRP) Synthesis 610: Leveraging Social Media Data for Emergency Preparedness and Response. The report looks at how social media is being used within state departments of transportation (state DOTs) with research revealing that 97.5% of state DOTs use social media to disseminate information during emergencies. When it comes to monitoring emergencies only 7.1% of state DOTs rely on social media as their primary information source. The report discusses barriers in the monitoring and analysis of social media by state DOTs and identifies areas for future research that could help state DOTs better respond to and manage emergencies.]]></description>
      <pubDate>Tue, 07 Jan 2025 17:24:33 GMT</pubDate>
      <guid>https://trid.trb.org/View/2485229</guid>
    </item>
    <item>
      <title>National Cooperative Highway Research Program (NCHRP) 2024 Annual Report</title>
      <link>https://trid.trb.org/View/2485309</link>
      <description><![CDATA[The National Cooperative Highway Research Program (NCHRP) is a practical, applied research program that produces implementable products addressing the day-to-day problems faced by transportation practitioners and managers. The NCHRP’s program and project development process is summarized in the monthly overview graphic and explained in detail on pages 4–5 of this 2024 annual report. The description of each stage highlights the activities and volunteer stakeholders involved and the accomplishments for 2024. The process involves hundreds of individuals and thousands of hours of effort to ensure a high-quality research program that addresses the most important needs of state Departments of Transportation (DOTs). The contents of this 2024 annual report are as follows: About the NCHRP; The Heart of the NCHRP: Our Volunteers; NCHRP Achievements in 2024; New NCHRP Staff; and NCHRP Publications and Projects in 2024.]]></description>
      <pubDate>Sun, 05 Jan 2025 17:07:33 GMT</pubDate>
      <guid>https://trid.trb.org/View/2485309</guid>
    </item>
    <item>
      <title>Numerical Modeling of Scour at Bridge Foundations on Rock</title>
      <link>https://trid.trb.org/View/2225933</link>
      <description><![CDATA[The present paper presents an application of the Comprehensive Scour Model (CSM) to quarrying and plucking of fractured rock at bridge piers. Numerical modeling of rock block plucking has been performed within the framework of the National Cooperative Highway Research Program Project NCHRP -24-29. A two-phase transient numerical model simulates the potential movements of the block as a function of flow turbulence and stream power in the scour hole around the bridge pier. The hydraulic action on the rock blocks is automatically adapted during formation and growth of the scour hole. Both the ultimate scour depth and the scour threshold flow velocity are determined as a function of the shape, dimensions and protrusion of the rock block, of the average upstream river bed slope and of the angle of the rock joints. The numerical model points out the influence of turbulent eddies and block protrusion on rock block uplift.]]></description>
      <pubDate>Tue, 17 Dec 2024 17:09:10 GMT</pubDate>
      <guid>https://trid.trb.org/View/2225933</guid>
    </item>
    <item>
      <title>Impacts of Debris on Bridge Pier Scour</title>
      <link>https://trid.trb.org/View/2225925</link>
      <description><![CDATA[Waterborne debris (or drift) often accumulates on bridges during flood events. The effects can vary from minor flow constrictions to severe flow contraction resulting in significant bridge foundation scour. The results of National Cooperative Highway Research Program (NCHRP) Project 24-26, "Impacts of Debris on Bridge Pier Scour" represent a significant advance to predicting debris scour considering the variable geometry of debris clusters observed at bridge piers in the field. The study produced results on two related problems: predicting the accumulation characteristics of debris from widely varying source areas, and developing improved methods for quantifying the depth of scour at bridge piers. This paper highlights the observations from laboratory testing and the development of improved algorithms for predicting the depth of scour at debris-laden bridge piers.]]></description>
      <pubDate>Tue, 17 Dec 2024 17:09:10 GMT</pubDate>
      <guid>https://trid.trb.org/View/2225925</guid>
    </item>
    <item>
      <title>Scour at Bridge Foundations on Rock: Overview of NCHRP Project No. 24-29</title>
      <link>https://trid.trb.org/View/2225909</link>
      <description><![CDATA[National Cooperative Highway Research Program Project 24-29 focuses on time-rate and design depth of scour at bridge foundations on rock. Rock scour is related to five processes: 1) weathering, 2) dissolution, 3) cavitation, 4) plucking, and 5) abrasion. Guidance is provided for identifying scour processes which deserve evaluation. Quarrying and plucking is a threshold process governed by flow velocity, turbulence intensity and block size. Degradable rock scour is cumulative and expressed in terms of stream power which can be accumulated over time. Probability weighted flood frequency captures the range of flow conditions and is converted to average annual scour. Empirical scour number is defined as documented scour divided by cumulative stream power. Geotechnical scour number is calculated from modified slake durability test results. Design scour depth is probability weighted average annual scour times the remaining bridge life or cumulative stream power over a bridge life times the appropriate scour number.]]></description>
      <pubDate>Tue, 17 Dec 2024 17:09:10 GMT</pubDate>
      <guid>https://trid.trb.org/View/2225909</guid>
    </item>
    <item>
      <title>From Concept to Practice: NCHRP's Implementation Support Program</title>
      <link>https://trid.trb.org/View/2446994</link>
      <description><![CDATA[National Cooperative Highway Research Program (NCHRP) Project 20-44, “Implementation Support Program” helps agencies transform documented transportation research into real-world practice. The author shares the history of this wide-reaching program, including noteworthy examples, emerging research, and its impact.]]></description>
      <pubDate>Thu, 31 Oct 2024 10:51:54 GMT</pubDate>
      <guid>https://trid.trb.org/View/2446994</guid>
    </item>
    <item>
      <title>US Domestic Scan Program -- Business Plan. Planning and Executing the NCHRP U.S. Domestic Scan Program</title>
      <link>https://trid.trb.org/View/2410391</link>
      <description><![CDATA[The National Cooperative Highway Research Program (NCHRP) U.S. Domestic Scan Program accelerates innovation among state departments of transportation (DOTs) by encouraging the spread of new ideas and effective technology transfers among and within agencies. Initiated in 2007 as NCHRP Project 20-68, the program helps DOT staff learn from peers about innovative practices beneficial to other agencies. Participants are expected to apply insights gained within their own agencies and present what they have learned to others, further disseminating new practices.

Each scan is conducted by a small team of knowledgeable professionals—typically state transportation agency staff supported by a subject-matter expert (SME)—who exchange information with peers and develop a report on leading practices. Since the program’s inception, 54 scans have been completed or are ongoing. Completed scan team reports are available on the project web page (https://www.trb.org/NCHRP/USDomesticScanProgram.aspx). The scan process, from topic selection to report completion, takes approximately 3 years.

The program includes three types of scans. Type 1 scans involve visits by a team of eight to 10 participants to host sites with innovative practices. Each scan might require one or two trips of about 1 week. Type 2 scans bring representatives from innovator agencies to central locations to meet with the scan team, reducing travel time. Type 3 scans supplement a desk scan with a symposium or workshop, bringing together practitioner innovators and the scan team to discuss relevant experiences. The NCHRP Project 20-68 panel specifies the appropriate scan type for each topic.

A scan entails four key steps: (1) identifying useful innovations, (2) assessing the experience of early adopters to evaluate potential benefits and obstacles, (3) documenting the results to share with others, and (4) progressive diffusion of information through dissemination activities tailored for each scan, which can accelerate innovation at DOTs and may include support for scan participants to advise peers on adopting new ideas.

Scan team participants are identified by the American Association of State Highway and Transportation Officials (AASHTO) in cooperation with NCHRP’s scan contractor. Each scan team, supported by the contractor, produces a report and other materials to disseminate scan results. The contractor engages an SME to prepare a “desk scan” that surveys where innovative practices are being applied and provides a basis for planning the scan team’s activities. The SME typically prepares draft and scan reports using materials from scan team members. The contractor organizes and executes all scan activities, monitors the program’s accomplishments, and reports periodically on its status and plans. Scan team members are expected to encourage dissemination and adoption of good ideas, with contractor support, even after the scan report is completed.

OBJECTIVE: The objective of this project is to plan and manage the execution of scans under the NCHRP U.S. Domestic Scan Program. Achieving this requires understanding various scan topics, how state transportation agencies develop and adopt advances in practice, the practical challenges of forming and supporting scan teams, preparing high-quality reports and documentation, and supporting participants in disseminating what they have learned. ]]></description>
      <pubDate>Mon, 29 Jul 2024 17:41:04 GMT</pubDate>
      <guid>https://trid.trb.org/View/2410391</guid>
    </item>
    <item>
      <title>NCHRP Research Reports 1035 and 993: Setting Performance Targets That Matter</title>
      <link>https://trid.trb.org/View/2381895</link>
      <description><![CDATA[This article presents highlights from two National Cooperative Highway Research Program (NCHRP) Research Reports created to help state departments of transportation and metropolitan planning organizations decide how to set performance targets, the level at which to set them, and how to navigate the messages their targets send to sponsors and the public. The reports are: NCHRP Research Report 1035: Guide to Effective Methods for Setting Transportation Performance Targets; and NCHRP Research Report 993: Managing Performance to Enhance Decision-Making: Making Targets Matter. Together, these resources can help agencies set targets for the national performance measures and use them and other performance measures to influence decision making to improve system performance.]]></description>
      <pubDate>Wed, 29 May 2024 09:28:54 GMT</pubDate>
      <guid>https://trid.trb.org/View/2381895</guid>
    </item>
    <item>
      <title>Implementation of Post-Award Contract Administration Tools in D-B and CM-GC Highway Projects: The State of Practice in the Design Phase</title>
      <link>https://trid.trb.org/View/2353045</link>
      <description><![CDATA[Many state departments of transportation (DOTs) are executing design-build (D-B) and construction manager-general contractor (CM-GC) projects. There is a need to identify and disseminate successful practices in administering these contracts, particularly in the post-award phase. The National Cooperative Highway Research Program (NCHRP) funded the development of guidebooks and implementation training related to tools and strategies for effective contract administration, including eight interactive workshops involving 235 participants from 33 DOTs. Training introduced participants to the tools for post-award contract administration and included peer-exchanges with 18 experts. This paper describes the workshops and shares experiences implementing these tools by various DOTs in the design phase. Qualitative content analyses identified reasons for use, processes, and examples of experts’ implementation resulting in advice to inform practitioners. The paper contributes by providing guidance for efficient implementation of tools to achieve successful contract administration, enhanced communication, and better owner-contractor relationships in D-B and CM-GC projects.]]></description>
      <pubDate>Tue, 21 May 2024 16:54:50 GMT</pubDate>
      <guid>https://trid.trb.org/View/2353045</guid>
    </item>
    <item>
      <title>New Findings on Existing Resilient Modulus Constitutive Models through Performance Comparison on LTPP Data</title>
      <link>https://trid.trb.org/View/2359147</link>
      <description><![CDATA[Resilient modulus (Mᵣ) serves as a fundamental material property utilized for characterizing unbound pavement materials in pavement design. While the repeated load triaxial test (RLT) is the standard method to determine Mᵣ, it can be impractical due to the required test facilities and expertise. As a result, various constitutive models have been proposed to predict Mᵣ of soil based on the stress state and soil properties. This study evaluates the performance of 10 such constitutive models based on their accuracy in representing the relationship between Mᵣ and stress conditions for RLT test data taken from the long-term pavement performance (LTPP) database. The 10 constitutive models consisted of models recommended by various researchers and institutions, including the one proposed by the National Cooperative Highway Research Program (NCHRP) and adopted by the Mechanistic-Empirical Pavement Design Guide (MEPDG). A multivariable nonlinear curve fitting technique was used to fit the data to the models and obtain model coefficients. The performance of these models was then measured by using the coefficient of determination (R²), the root mean square error (RMSE) and the mean absolute error (MAE) values as metrics. The results show that the models proposed by NCHRP, Puppala as well as Ni performed best, with Puppala’s model showing slight superiority. On the other hand, the models proposed by Rahim and George, Kim, and Moossazadeh and Witczak produced poor results. The results also indicate that models having the general form of NCHRP and expressed in terms of confining pressure and deviator stress perform better. The findings of this study will provide insights into the reliability of existing models and considerations that should be made for developing better alternative models in the future.]]></description>
      <pubDate>Fri, 10 May 2024 16:50:59 GMT</pubDate>
      <guid>https://trid.trb.org/View/2359147</guid>
    </item>
    <item>
      <title>Management of Runoff from Surface Transportation Facilities</title>
      <link>https://trid.trb.org/View/2154857</link>
      <description><![CDATA[This project, which is funded by the National Cooperative Highway Research Program, includes both a synthesis of current information and a plan to guide future research. The issues to be studied include regulations and permitting, runoff water quality characteristics, best management practices, receiving water impacts, and habitat impacts. The tasks include a detailed review of existing information plus digitization of key information and software development to identify gaps in the current state of knowledge. A nationwide survey of experts will assist in identifying existing information. After the information has been scanned to identify gaps, the team will identify and prioritize future research to fill the gaps. This research plan will then influence future NCHRP funding on highway runoff research projects.]]></description>
      <pubDate>Mon, 12 Feb 2024 14:22:39 GMT</pubDate>
      <guid>https://trid.trb.org/View/2154857</guid>
    </item>
  </channel>
</rss>