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    <title>Transport Research International Documentation (TRID)</title>
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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Transport Research International Documentation (TRID)</title>
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      <title>Research and Technology Coordinating Committee Letter Report: September 2025</title>
      <link>https://trid.trb.org/View/2606595</link>
      <description><![CDATA[This letter report begins with a brief overview of the nation’s highway research, development, and technology (RD&T) enterprise, which the Federal Highway Administration (FHWA) supports by conducting and sponsoring research and by promoting technology transfer to state and local transportation agencies and private industry. More details are then provided on the FHWA RD&T program’s goals, structure, activities, and budget levels before turning to a review of how FHWA’s Turner-Fairbank Highway Research Center (TFHRC) uses its specialized capabilities, staff expertise, and partnerships to support FHWA’s mission and the interests of highway agency customers. The letter report closes with conclusions about TFHRC’s priorities, capabilities, and constraints, each followed by the Research and Technology Coordinating Committee's (RTCC’s) advice on opportunities for further strengthening FHWA’s important role and contributions to the nation’s highway RD&T enterprise.]]></description>
      <pubDate>Sun, 05 Oct 2025 18:55:39 GMT</pubDate>
      <guid>https://trid.trb.org/View/2606595</guid>
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    <item>
      <title>Strengthening Data Science Skills at Turner-Fairbank</title>
      <link>https://trid.trb.org/View/2572958</link>
      <description><![CDATA[This report describes an 18-month effort to develop a prototype data science upskilling program for Turner-Fairbank staff. Critical findings that shaped the development of the prototype were: Research & Development (R&D) managers who may need to engage with the R&D themselves should be core target audience for the program; the program must be multi-level, including a foundational level, optional specialized training, and individual advising; to start, the program should center on self-service course offerings. The effort concluded with pilot testing of a prototype program and a study of recommended steps that Turner-Fairbank leaders can take to encourage staff to use skills they learn in the training.]]></description>
      <pubDate>Wed, 06 Aug 2025 15:00:21 GMT</pubDate>
      <guid>https://trid.trb.org/View/2572958</guid>
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      <title>Collaborative Highway Asset Research: Integrated Sensor-Model Application (CHARISMA)</title>
      <link>https://trid.trb.org/View/2406727</link>
      <description><![CDATA[The United States Federal Highway Administration's (FHWA) nondestructive evaluation (NDE) program is dedicated to conducting state-of-the-art research, development, and implementation of emerging NDE technologies to assess the nation’s highway infrastructure assets. In 2022, to promote collaboration and develop NDE standards, the FHWA NDE program launched the Collaborative Highway Asset Research: Integrated Sensor-Model Application (CHARISMA) project. CHARISMA is an open-source software platform that facilitates the analysis and visualization of NDE and infrastructure inspection data and fosters collaboration among government agencies, academia, and industry. This article provides an overview of CHARISMA.]]></description>
      <pubDate>Thu, 25 Jul 2024 11:38:27 GMT</pubDate>
      <guid>https://trid.trb.org/View/2406727</guid>
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    <item>
      <title>Can Chemistry Improve the Nation’s Roadways?</title>
      <link>https://trid.trb.org/View/2350796</link>
      <description><![CDATA[The Federal Highway Administration’s Turner-Fairbank Highway Research Center (TFHRC) has had the Chemistry Laboratory for more than 100 years. The scientists and researchers in the Chemistry Laboratory help to foster innovation in support of FHWA’s long-standing mission of increasing safety on the nation’s roadways. From performing research on concrete and asphalt to the development of standards to conducting forensic investigations on pavements and other highway structures, the FHWA Chemistry Laboratory plays a key role behind the scenes to advance the understanding of chemical changes that contribute to road failure or damage; advance the understanding of chemical changes that can contribute to potential performance enhancements; develop state-of-the-art characterization tools; and test and foster new materials development. This article provides an overview of the Chemistry Laboratory's work.]]></description>
      <pubDate>Thu, 14 Mar 2024 09:37:35 GMT</pubDate>
      <guid>https://trid.trb.org/View/2350796</guid>
    </item>
    <item>
      <title>Cooperative Driving Automation (CDA) Research Program: Development, Testing, and Evaluation</title>
      <link>https://trid.trb.org/View/2101558</link>
      <description><![CDATA[This article focuses on the Federal Highway Administration’s (FHWA) new Cooperative Driving Automation (CDA) Program. It describes two successful use cases in transportation systems management and operations (TSMO) conducted at the Turner-Fairbank Highway Research Center in McLean, Virginia. It also describes port drayage proof-of-concept testing conducted under the CDA program's freight research track. The article emphasizes the role of CARMA in the CDA Program. CARMA is a continuously developed set of tools within the CDA Program that aid and enable the advancement of the focus areas.]]></description>
      <pubDate>Fri, 27 Jan 2023 10:49:04 GMT</pubDate>
      <guid>https://trid.trb.org/View/2101558</guid>
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    <item>
      <title>Optimization of Parameters of the New Turner-Fairbank Alkali-Silica Reactivity Susceptibility Test (T-Fast)</title>
      <link>https://trid.trb.org/View/2040278</link>
      <description><![CDATA[Prevention is an effective strategy to avoid damage caused by the alkali-silica reaction (ASR) in concrete structures. The effectiveness of this strategy heavily depends on the use of reliable accelerated tests to determine if an aggregate used in the concrete has the potential to cause ASR. Recently, a new provisional standard test, AASHTO TP 144-21, Determining the Potential Alkali–Silica Reactivity of Coarse Aggregates (TFHRC-TFAST), has been approved by the American Association of State Highway and Transportation Officials. The test accurately predicted the ASR-induced expansion of aggregates used in more than 50 different mortar and concrete samples, including concrete blocks in outdoor testing facilities and concrete in the field. This manuscript presents the results of the collaborative study among three laboratories conducted as part of an overall effort to standardize the new AASHTO TP 144-21. The objectives of the study were to evaluate the suitability of wavelength dispersive x-ray fluorescence (WDXRF) spectroscopy as the main analytical technique, determine the optimal particle size and effect of moisture on calcium oxide (CaO), and evaluate sample preparation on the results. A total of 18 aggregates were evaluated under the TP 144-21 using 4 different CaO samples and 2 sample preparation protocols. The results indicated that the alkali-silica reactivity of the aggregates can be accurately determined by using WDXRF. Upon exposure to the atmosphere, CaO reacts rapidly with moisture to produce calcium hydroxide [Ca(OH)2]. The particle size distribution and amount of Ca(OH)2 in the CaO influenced the ASR classification of marginal (moderately and slow reactive) and nonreactive aggregates. The researchers obtained optimal results using a reagent grade powder CaO with an average particle size of 4.6 µm and less than 5 % of Ca(OH)2. These conclusions were important to validate and optimize the TP 144-21 protocol before launching a wider interlaboratory study.]]></description>
      <pubDate>Fri, 16 Dec 2022 09:58:09 GMT</pubDate>
      <guid>https://trid.trb.org/View/2040278</guid>
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    <item>
      <title>A Evaluation of a Quarry Byproduct Material for Use in an Inverted Pavement System</title>
      <link>https://trid.trb.org/View/1929178</link>
      <description><![CDATA[Most quarries in the United States have an abundance of the No. 10-screenings (i.e., stone dust) byproduct, which is often considered a byproduct material from the production of conventional aggregates. The use of byproduct materials will become necessary in the future. One potential application is to use stone dust in inverted pavements systems by improving their engineering properties with cement treatment. The concept inverted pavements were developed in South Africa about 50 years ago; however, their use is relativity new in the United States. This paper explores the use of No. 10-screenings to create a cement-treated base for a pavement test section at the Turner-Fairbank Highway Research Center. No. 10-screenings and 21A aggregate were collected from a local quarry and tested for gradation and density. Specimens were then made with both soils at 2, 4, and 6 percent cement and tested after a 7-day cure for permeability, unconfined compressive strength, and resilient modulus. The percentage of cement in the soil showed a negative relationship with the permeability and a positive relationship with soil stiffness. Without any added cement, No.10-screenings and 21A have similar permeability, but the No. 10-screenings were 30 percent less stiff than the 21A soil. Adding 2 percent cement to the No. 10-screenings resulted a cement-treated material equivalent to the 21A in stiffness.]]></description>
      <pubDate>Wed, 13 Jul 2022 10:56:49 GMT</pubDate>
      <guid>https://trid.trb.org/View/1929178</guid>
    </item>
    <item>
      <title>Looking to Aggregates to Improve Pavement Sustainability</title>
      <link>https://trid.trb.org/View/1867258</link>
      <description><![CDATA[The United States Federal Highway Administration (FHWA) is conducting research, developing tools, and gathering data to improve how aggregate materials are sourced, planned, and used in sustainable pavement construction and maintenance. This article provides an overview of those activities. It also presents FHWA's Sustainable Pavements Program, which provides webinars, tools, and resources developed and presented to the pavement community that consider the elements of the triple bottom line of sustainability that are impacted by pavement design, aggregate choices, and pavement life cycle performance. Through the program, FHWA has developed tools to aid in choosing sustainable options for aggregate sources, transportation, and recycling, as well as showing how better performance and timely preservation are significant inputs into life-cycle analysis and pavement management concepts.]]></description>
      <pubDate>Fri, 23 Jul 2021 15:25:08 GMT</pubDate>
      <guid>https://trid.trb.org/View/1867258</guid>
    </item>
    <item>
      <title>Former Research Associates Find Success</title>
      <link>https://trid.trb.org/View/1867257</link>
      <description><![CDATA[This article discusses the United States Federal Highway Administration's (FHWA) Research Associateship Program. The program provides mentorship and career-building opportunities for participants and sometimes results in associates being hired by FHWA. The article presents profiles of several research associates.]]></description>
      <pubDate>Fri, 23 Jul 2021 15:25:08 GMT</pubDate>
      <guid>https://trid.trb.org/View/1867257</guid>
    </item>
    <item>
      <title>Showcasing Highway Research</title>
      <link>https://trid.trb.org/View/1682033</link>
      <description><![CDATA[On September 18, 2019, FHWA hosted its first-ever Research Showcase at the U.S. Department of Transportation's headquarters in Washington, DC. This article provides an overview of the FHWA  Research Showcase and highlights some of its displays, features, and presentations. The event featured innovations developed through FHWA's Office of Research, Development, and Technology (RD&T), located at the Turner-Fairbank Highway Research Center (TFHRC), and other FHWA offices. The FHWA Research Showcase featured 25 exhibits and demonstrations, and 3 presentations that provided representatives from USDOT modes and other highway stakeholders with a first-hand look at the latest transportation technology.]]></description>
      <pubDate>Fri, 31 Jan 2020 11:57:44 GMT</pubDate>
      <guid>https://trid.trb.org/View/1682033</guid>
    </item>
    <item>
      <title>Hardware-in-the-Loop Testing of Connected and Automated Vehicle Applications: A Use Case for Queue-Aware Signalized Intersection Approach and Departure</title>
      <link>https://trid.trb.org/View/1496761</link>
      <description><![CDATA[Most existing studies on connected and automated vehicle (CAV) applications apply simulation to evaluate system effectiveness. Model accuracy, limited data for calibration, and simulation assumptions limit the validity of evaluation results. One alternative approach is to use emerging hardware-in-the-loop (HIL) testing methods. HIL test environments enable physical test vehicles to interact with virtual vehicles from traffic simulation models, providing an evaluation environment that can replicate deployment conditions at early stages of CAV technology implementation without incurring excessive costs related to large field tests. In this study, a HIL testing system for vehicle-to-infrastructure (V2I) CAV applications is developed. The involved software and hardware includes a physical CAV controlled in real time, a traffic signal controller, communication devices, and a traffic simulator (VISSIM). Such HIL systems increase validity by considering the physical vehicle’s trajectories—which are constrained by real-world factors such as GPS accuracy, communication delay, and vehicle dynamics—in a simulated traffic environment. The developed HIL system is applied to test a representative early deployment CAV application: queue-aware signalized intersection approach and departure (Q-SIAD). The Q-SIAD algorithm generates recommended speed profiles based on the vehicle’s status, signal phase and timing (SPaT), downstream queue length, and system constraints and parameters (e.g., maximum acceleration and deceleration). The algorithm also considers the status of other vehicles in designing the speed profiles. The experiment successfully demonstrated this functionality with one test CAV driving through one intersection controlled by a fixed-timing traffic signal under various simulated traffic conditions.]]></description>
      <pubDate>Fri, 23 Feb 2018 16:37:58 GMT</pubDate>
      <guid>https://trid.trb.org/View/1496761</guid>
    </item>
    <item>
      <title>What's in Your Asphalt?</title>
      <link>https://trid.trb.org/View/1486767</link>
      <description><![CDATA[This article discusses the use of re-refined engine oil bottoms (REOB) as a binder in asphalt pavements. It has recently been discovered that the use of REOB is widespread, despite the fact that many transportation agencies knew nothing about it.  The United States Federal Highway Administration's Turner Fairbank Highway Research Center is developing and carrying out tests to determine whether REOB is present in pavements. Tests have shown that there is a connection between REOB and pavement cracking.]]></description>
      <pubDate>Mon, 30 Oct 2017 09:10:51 GMT</pubDate>
      <guid>https://trid.trb.org/View/1486767</guid>
    </item>
    <item>
      <title>FHWA’s “Innovations Factory” Commands Presidential Attention</title>
      <link>https://trid.trb.org/View/1350999</link>
      <description><![CDATA[President Barack Obama visited the Turner-Fairbank Highway Research Center (TFHRC) in McLean, Virginia in July 2014. The president’s visit highlighted the century of research conducted by TFHRC. During the visit, President Obama emphasized the need for Congress to pass a bill addressing the coming shortfall in the Highway Trust Fund. He also stressed the need for research on highway safety. The president’s visit included a tour of the TFHRC facility and highlighted work on connected vehicle technology. It is necessary for highway research to continue as the nation’s highway system continues to increase in volume and weight of traffic.]]></description>
      <pubDate>Fri, 24 Apr 2015 11:22:48 GMT</pubDate>
      <guid>https://trid.trb.org/View/1350999</guid>
    </item>
    <item>
      <title>Strategic Plan for the Turner-Fairbank Highway Research Center</title>
      <link>https://trid.trb.org/View/1343370</link>
      <description><![CDATA[Located in McLean, Virginia, the Turner-Fairbank Highway Research Center (TFHRC) is the Federal Highway Administration's (FHWA’s) core facility for research, development, and technology within the broader transportation research community. This document describes TFHRC’s plans for providing national leadership in highway research, both by advancing its own endeavors and by coordinating those endeavors with activities managed by other offices within FHWA and the U.S. Department of Transportation (USDOT), and by other public, private, academic, and international entities. Indeed, partnerships constitute a key element of the Strategic Plan. Other major themes of the Plan include identification and implementation of the right research; systematic planning of TFHRC’s research capabilities, both human resources and infrastructure; and accelerated transition of technology from the laboratory to the operating environment.]]></description>
      <pubDate>Thu, 26 Feb 2015 09:49:38 GMT</pubDate>
      <guid>https://trid.trb.org/View/1343370</guid>
    </item>
    <item>
      <title>Computational Mechanics Research and Support for Aerodynamics and Hydraulics at TFHRC, Year 3 Quarter 2 Progress Report</title>
      <link>https://trid.trb.org/View/1302469</link>
      <description><![CDATA[The computational fluid dynamics (CFD) and computational structural mechanics (CSM) focus areas at  Argonne’s Transportation Research and Analysis Computing Center (TRACC) initiated a project to  support and compliment the experimental programs at the Turner-Fairbank Highway Research Center  (TFHRC) with high performance computing based analysis capabilities in August 2010. The project was  established with a new interagency agreement between the Department of Energy and the Department  of Transportation to provide collaborative research, development, and benchmarking of advanced three-dimensional computational mechanics analysis methods to the aerodynamics and hydraulics  laboratories at TFHRC for a period of five years, beginning in October 2010. The analysis methods  employ well benchmarked and supported commercial computational mechanics software. Computational mechanics encompasses the areas of Computational Fluid Dynamics (CFD), Computational Wind Engineering (CWE), Computational Structural Mechanics (CSM), and Computational Multiphysics Mechanics (CMM) applied in Fluid-Structure Interaction (FSI) problems. The major areas of focus of the project are wind and water effects on bridges — superstructure, deck, cables, and substructure (including soil), primarily during storms and flood events — and the risks that these loads pose to structural failure. For flood events at bridges, another major focus of the work is assessment of the risk to bridges caused by scour of stream and riverbed material away from the foundations of a bridge. Other areas of current research include modeling of the salt spray transport into bridge girders to address suitability of using weathering steel in bridges, CFD analysis of the operation of the wind tunnel in the TFHRC wind engineering laboratory, and coupling of CFD and CSM software to solve fluid structure interaction problems, primarily analysis of bridge cables in wind. This quarterly report documents technical progress on the project tasks for the period of January through March 2013.]]></description>
      <pubDate>Sat, 29 Mar 2014 11:15:12 GMT</pubDate>
      <guid>https://trid.trb.org/View/1302469</guid>
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