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The US Transportation Collection consists of documents from across all transportation modes with specific focus on research reports from US DOT, state DOTs, and other transportation organizations. Bookmark this collection: https://rosap.ntl.bts.gov/collection_ust or https://doi.org/10.21949/1530857.

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Showing 201 - 220 of 36841 results
  • Mitigation of Tenting of Transverse Cracks and Joints in Asphalt Pavement
    Mitigation of Tenting of Transverse Cracks and Joints in Asphalt Pavement
    Barman, Manik ;
    Chakraborty, Manik
    2026-04-01 | PDF
    Transverse cracking, a primary distress in cold-climate asphalt pavements, can lead to tenting, an upward distortion caused by ice formation in the base layer and at the interface of the surface and base layers. This research investigated pavement treatment efficacy and core tenting mechanisms through field measurements in six selected roads in Min ...
  • Evaluation of NDOTs Construction Stormwater Detention Measures Using FullScale Testing Techniques
    Evaluation of NDOT’s Construction Stormwater Detention Measures Using Full-Scale Testing Techniques
    Williams, Lillian K. ;
    Perez, Michael A.
    2026-04-01 | PDF
    Sediment is a leading pollutant in waterbodies, contributing to turbidity, pollutant transport, ecological degradation, and reduced flow capacity. Construction activities are major sources of sediment-laden runoff, necessitating regulatory compliance through Stormwater Pollution Prevention Plans. This study developed a full-scale testing methodolog ...
  • Analysis of the Effectiveness of Construction Management Plans
    Analysis of the Effectiveness of Construction Management Plans
    Caldas, Carlos ;
    Han, Zhe
    2026-04-01 | PDF
    This study aimed to assess the effectiveness of Construction Management Plans (CMPs). To achieve this goal, data from TxDOT highway projects was collected and analyzed. The analyses employed descriptive statistics, correlation analysis, hypothesis testing, and exploratory factor analysis to identify significant relationships between project charact ...
    Supporting Files
  • A Numerical Study of the Feasibility of Vertical Avalanche Defense Structures
    A Numerical Study of the Feasibility of Vertical Avalanche Defense Structures
    Meloche, Francis ;
    Simenhois, Ron
    2026-04-01 | PDF
    Traditional avalanche defense structures are costly to install and maintain, visually intrusive, and must be placed perpendicular to slopes. Many highway avalanche programs, therefore, rely on active measures like explosives, which carry inherent risks and may not prevent all large avalanches from reaching roadways. This project investigates an inn ...
  • UltraHighPerformance Concrete for the Alabama Transportation Industry
    Ultra-High-Performance Concrete for the Alabama Transportation Industry
    Osibodu, Segun J. ;
    Coleman, Daniel M.
    2026-04-01 | PDF
    Ultra-high-performance concrete (UHPC) offers exceptional compressive strength, sustained post-cracking tensile capacity, and inherent durability that makes it well suited for transportation applications such as closure pours, deck overlays, and precast element connections. The objective of this study was to develop, characterize, and field-validat ...
  • Use of ScupperModified Jersey Barriers by Small Wildlife Along a New Segment of I49 in Southwestern Missouri
    Use of Scupper-Modified Jersey Barriers by Small Wildlife Along a New Segment of I-49 in Southwestern Missouri
    Ortega, Brock ;
    Woodie, Clara
    2026-04-01 | PDF
    This study evaluated the effectiveness of scupper-modified Jersey barriers in facilitating small wildlife movement across a newly constructed segment of Interstate 49 in southwestern Missouri. Traditional concrete median barriers can reduce wildlife-vehicle collisions through fewer crossing attempts but create impermeable barriers for small-bodied ...
  • South Dakota Granular MoistureDensity Curve Development and Dynamic Cone Penetrometer Implementation
    South Dakota Granular Moisture-Density Curve Development and Dynamic Cone Penetrometer Implementation
    Nobakht, Mona ;
    Cary, Carlos
    2026-03-31 | PDF
    The South Dakota Department of Transportation (SDDOT) currently estimates optimum moisture content (OMC) and maximum dry unit weight (MDUW) for granular materials using one-point Proctor tests together with the Ohio Highway Department (OHD) moisture-density family of curves. Because the OHD curves were developed using materials from outside South D ...
  • Artificial Intelligence for Pavement Condition Assessment From 2D3D Surface Images Technical Summary Report
    Artificial Intelligence for Pavement Condition Assessment From 2D/3D Surface Images [Technical Summary Report]
    Wang, Feng ;
    Gong, Haitao
    2026-03-31 | PDF
    The project started with reviewing the literature of available datasets, established AI models and practices in the U.S. and other countries. The research team investigated the acquisition of high-resolution images with American Association of Highway and Transportation Officials (AASHTO) standard MP47 and created a tool for viewing the vendor's da ...
  • PerformanceBased StructuralFire Engineering Analysis Approaches for Highway Bridges
    Performance-Based Structural-Fire Engineering Analysis Approaches for Highway Bridges
    Quiel, Spencer ;
    Ma, Saidong
    2026-03-27 | PDF
    This report is the second part of a two-phase study to assemble performance-based design guidance for the evaluation and mitigation of severe fire hazards for highway bridges. The following are addressed: (1) summarize design-basis tools that can be used for “engineering analysis” per NFPA 502 Chapter 6 to calculate the thermo-mechanical impact of ...
  • BED329771 NEXTGEN Concrete Tests of the Future Chloride Diffusion
    BED32-977-1 NEXTGEN Concrete – Tests of the Future: Chloride Diffusion
    Su, Dan ;
    Ismail, Mohamed
    2026-03-24 | PDF
    FDOT is seeking to maximize the durability of newly constructed structural elements. As part of this goal, FDOT needs to do a better job assessing concrete mixes for specific structural applications. This assessment needs to adapt to the ever-changing physical, chemical, and market issues associated with concrete’s constituent ingredients. FDOT nee ...
  • Integrated Optimization of Routing Scheduling Charging and Platooning for a Mixed Fleet of Electric and Conventional Trucks
    Integrated Optimization of Routing, Scheduling, Charging, and Platooning for a Mixed Fleet of Electric and Conventional Trucks
    Hosseinpanahi, Danesh ;
    Yang, Jialu
    2026-03-20 | PDF
    The integration of truck platooning and electrification presents a promising avenue for improving operational efficiency and environmental sustainability in freight transportation. Realizing the energy and cost saving as well as emission reduction benefits requires a holistic design of truck routing, scheduling, and platooning strategies that accou ...
  • Utilizing Emergency Management Audio Messages for Traffic Incident Management Performance Measures
    Utilizing Emergency Management Audio Messages for Traffic Incident Management Performance Measures
    Gartner, Christopher ;
    Vajpayee, Vihaan
    2026-03-06 | PDF
    Timely and accurate information regarding roadway incidents is critical for Traffic Management Centers (TMCs) to maintain safety and mobility. While Intelligent Transportation Systems (ITS) cameras and crowdsourced data provide significant visibility, rural interstate corridors often suffer from coverage gaps, or "blind spots," where incidents go u ...
  • How Does Transportation Insecurity Compare and Relate to Other Indicators of Material Hardship in the US
    How Does Transportation Insecurity Compare and Relate to Other Indicators of Material Hardship in the U.S.?
    Murphy, Alexandra K. ;
    Pilkauskas, Natasha V.
    2026-03-01 | PDF
    Increasingly, researchers have used measures of material hardship (food, housing, utility, bills, medical) to better understand economic distress. Missing from this literature are hardships related to transportation. This descriptive paper uses recent nationally representative data and a newly validated measure of transportation insecurity to addre ...
  • Low and Intermediate Temperature Evaluation of Asphalt Binders Through Dynamic Shear Rheometer
    Low and Intermediate Temperature Evaluation of Asphalt Binders Through Dynamic Shear Rheometer
    Salari, Saman ;
    Cooper, Samuel B.
    2026-03-01 | PDF
    The low-temperature properties of asphalt binder play a critical role in the behavior and performance of flexible pavements. Since the 1990s, the Bending Beam Rheometer (BBR) has been the standard instrument for characterizing these properties. However, BBR testing requires time-consuming sample preparation and extensive equipment maintenance. Desp ...
  • Skew Detection System Replacement on Vertical Lift Bridges Phase III Project Capsule
    Skew Detection System Replacement on Vertical Lift Bridges (Phase III) [Project Capsule]
    Rees, Gareth
    2026-03-01 | PDF
    The objective of this study is to further improve and refine the recommended preferred alternative skew monitoring and detection technologies (inclinometer and encoder systems only), integrating them into the existing control system and proving their operability and long-term reliability at the Ellenders Ferry Vertical Lift Bridge.
  • Balanced Mix Designa 1Year Reality Check on Quality Control Testing and State DOT Adoption
    Balanced Mix Design—a 1-Year Reality Check on Quality Control Testing and State DOT Adoption
    Huang, Kai ;
    Huang, Baoshan
    2026-03-01 | PDF
    Balanced Mix Design (BMD) represents a major advancement in asphalt pavement engineering. As a performance-driven framework, BMD integrates mix design, structural design, quality assurance/quality control (QA/QC), and performance-related specifications (PRS) to promote durable and sustainable pavements and innovations. This synthesis documents the ...
  • Halifax County Road Orders 17521767
    Halifax County Road Orders 1752–1767
    Miller, Ann Brush
    2026-03-01 | PDF
    The road history projects undertaken by the Virginia Transportation Research Council establish the feasibility of studies of early road networks and their use in the environmental review process. These projects, by gathering and publishing the early road orders of the vast parent counties and other significant areas, also lay the foundation for add ...
  • Intersection Safety Performance Function Calibration for Project Planning and Design
    Intersection Safety Performance Function Calibration for Project Planning and Design
    Appiah, Justice
    2026-03-01 | PDF
    This study calibrated the predictive models for conventional intersections in the Highway Safety Manual (HSM) second edition draft to account for local conditions in Virginia. The calibration ensures that predictions made with the HSM safety performance functions accurately reflect the crash experience, driver population, and environmental characte ...
  • Technical Appendix Mapping HighQuality Transit
    Technical Appendix: Mapping High-Quality Transit
    Wasserman, Jacob L. ;
    Barrall, Aaron
    2026-03-01 | PDF
    “Major transit stop”: how these three words are defined determines what can be built where, throughout much of California. In order to address housing supply constraints, the state legislature has enacted a number of laws that streamline approval and remove zoning constraints in areas close to high-quality transit. But what, exactly, is a “major tr ...
  • Signal Controller in the Loop Simulation
    Signal Controller in the Loop Simulation
    Hurwitz, David ;
    Jashami, Hisham
    2026-03-01 | PDF
    A novel Hardware-in-the-loop Simulation tool was constructed to show how modifications to signal timings would improve coordinated corridor performance. A total of 15 unique microsimulation models were developed and run three times each to test three case studies of bi-direction bandwidth optimization, cycle length sensitivity, and leading pedestri ...
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