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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 1 - 20 of 36054 results
  • Early Estimate of Motor Vehicle Traffic Fatalities and Fatality Rate in 2025 Traffic Safety Facts
    Early Estimate of Motor Vehicle Traffic Fatalities and Fatality Rate in 2025 [Traffic Safety Facts]
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2026-04-01 | PDF
    This edition of Crash*Stats is a brief statistical summary of projected traffic fatalities and fatality rate for 2024 when an estimated 36,640 people died in motor vehicle traffic crashes, a decrease of about 6.7 percent compared to 39,254 fatalities in 2024. The fourth quarter of 2025 represents the 15th consecutive quarterly decline in fatalities ...
  • Distracted Driving in 2024 Traffic Safety Facts
    Distracted Driving in 2024 [Traffic Safety Facts]
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2026-04-01 | PDF
    The National Highway Traffic Safety Administration works to reduce the occurrence of distracted driving and raise awareness of its dangers. This risky driving behavior poses a danger not only to vehicle occupants but pedestrians and pedalcyclists as well. Driver distraction is a specific type of driver inattention that occurs when drivers divert at ...
  • Overview of Motor Vehicle Traffic Crashes in 2024 Traffic Safety Facts
    Overview of Motor Vehicle Traffic Crashes in 2024 [Traffic Safety Facts}
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2026-04-01 | PDF
    There were 1,771 fewer people killed in motor vehicle traffic crashes on U.S. roadways during 2024, a 4.3-percent decrease from 41,025 in 2023 to 39,254 in 2024. The fatality rate per 100 million vehicle miles traveled (VMT) decreased 5.6 percent from 1.26 in 2023 to 1.19 in 2024. It represents the third year-to-year decrease in both fatalities and ...
  • 2024 FARSCRSS Coding Manual for Pedestrian Bicyclist Crash Typing
    2024 FARS/CRSS Coding Manual for Pedestrian Bicyclist Crash Typing
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2026-04-01 | PDF
    NHTSA has collected motor vehicle traffic crash data since the early 1970s to support its mission to reduce motor vehicle traffic crashes, injuries, and deaths on our Nation’s trafficways. The two data systems included in this Coding and Validation Manual are the Fatality Analysis Reporting System (FARS) and the Crash Report Sampling System (CRSS). ...
  • 2024 FARSCRSS Coding and Validation Manual
    2024 FARS/CRSS Coding and Validation Manual
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2026-04-01 | PDF
    NHTSA has collected motor vehicle traffic crash data since the early 1970s to support its mission to reduce motor vehicle traffic crashes, injuries, and deaths on our Nation’s trafficways. The two data systems included in this Coding and Validation Manual are the Fatality Analysis Reporting System (FARS) and the Crash Report Sampling System (CRSS). ...
  • Product Information Catalog and Vehicle Listing vPIC Analytical Users Manual 2024
    Product Information Catalog and Vehicle Listing (vPIC) Analytical User's Manual, 2024
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2026-04-01 | PDF
    This manual updates guidance to users of VIN decoding in NHTSA’s crash studies using NHTSA’s Product Information Catalog and Vehicle Listing (vPIC) based on vehicle manufacturer submissions to NHTSA as mandated by 49 CFR Part 565.
  • Crash Report Sampling System Analytical Users Manual 20162024
    Crash Report Sampling System Analytical User’s Manual, 2016-2024
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2026-04-01 | PDF
    This is the updated and revised Crash Report Sampling System Analytical User’s Manual for the period 2016 to 2024.
  • Fatality Analysis Reporting System Analytical Users Manual 19752024
    Fatality Analysis Reporting System Analytical User’s Manual, 1975-2024
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2026-04-01 | PDF
    This is the updated and revised Fatality Analysis Reporting System Analytical User’s Manual for the period 1975 to 2024.
  • Surface Mixtures Incorporating Recycled Plastic and High Reclaimed Asphalt Pavement Contents 2022 and 2023 Field Trials
    Surface Mixtures Incorporating Recycled Plastic and High Reclaimed Asphalt Pavement Contents: 2022 and 2023 Field Trials
    Habbouche, Jhony ;
    Diefenderfer, Stacey D.
    2026-04-01 | PDF
    Like many other state highway agencies, the Virginia Department of Transportation is extensively working to consider how to best incorporate recycled materials—such as recycled plastic, reclaimed asphalt pavement (RAP) at higher contents with and without the use of recycling agents (RAs), and other materials—into their roads while maintaining or im ...
  • 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 ...
  • Developing Data Sources and Standards for Supporting Arterial TSMO Implementation of the Statewide Arterial Management Program STAMP Summary
    Developing Data Sources and Standards for Supporting Arterial TSM&O Implementation of the Statewide Arterial Management Program (STAMP) [Summary]
    Heery, Fred ;
    Abdel-Aty, Mohamed
    2026-03-01 | PDF
    The project aimed to develop data sources, standards, and actionable guidance that FDOT can use to strengthen arterial TSM&O implementation statewide. This included reviewing the literature, evaluating existing software tools, identifying best practices from other departments of transportation, and creating recommendations tailored to Florida’s dis ...
  • 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 ...
  • 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 ...
  • Analysis of the Potential Revenue and Equity Impacts of an ECommerce Household Delivery Fee in Oregon
    Analysis of the Potential Revenue and Equity Impacts of an E-Commerce Household Delivery Fee in Oregon
    Figliozzi, Miguel
    ORCID ICON IMG
    2026-03-01 | PDF
    The research goal of this project is to better understand the potential implications of a household e-commerce delivery fee. A survey was developed to study the factors that impact potential revenue and its equity implications.
  • 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 ...
  • Use of FiberReinforced Polymer Composites for Bridge Repairs in Montana
    Use of Fiber-Reinforced Polymer Composites for Bridge Repairs in Montana
    Ahmed, Emtiaz ;
    Matteson, Kirsten
    2026-03-01 | PDF
    Montana’s timber bridge inventory includes over 600 state and county owned bridges, many more than 80 years old and showing visible deterioration. Traditional girder repair methods, such as steel hangers and timber or steel sister girders, are heavy, labor-intensive, and often lack well-documented performance verification. Fiber-reinforced polymer ...
  • OpenGraded Friction Courses Suitable for Suburban Environments Summary
    Open-Graded Friction Courses Suitable for Suburban Environments [Summary]
    Tran, Nam ;
    Moseley, Howie
    2026-03-01 | PDF
    The project aimed to evaluate the impact of four strategies designed to improve the durability of FC-5 mixtures: employing a 9.5-mm nominal maximum aggregate size (NMAS) gradation; using a high polymer (HP) modified binder in the mixture; assessing the effectiveness of a 12.5-mm stone matrix asphalt (SMA); and exploring an alternative friction cour ...
  • Factors That Influence the Variability of Concrete Surface Resistivity of Field Cast Samples Summary
    Factors That Influence the Variability of Concrete Surface Resistivity of Field Cast Samples [Summary]
    DeLorenzo, Richard ;
    Riding, Kyle A.
    2026-03-01 | PDF
    The main objective of this research was to identify and quantify the factors that influence resistivity measurements in concrete samples, comparing field- and laboratory-fabricated specimens (per AASHTO T 358 and AASHTO TP 119).
  • Special Crash Investigations OnSite Ambulance Crash Investigation Vehicle 2018 Chevrolet Silverado 3500 Type I Ambulance Location Kentucky Crash Date April 2024
    Special Crash Investigations: On-Site Ambulance Crash Investigation; Vehicle: 2018 Chevrolet Silverado 3500 Type I Ambulance; Location: Kentucky; Crash Date: April 2024
    Crash Research & Analysis, Inc
    2026-03-01 | PDF
    This on-site investigation documents the front plane underride crash of a 2018 Chevrolet Silverado 3500 Type I ambulance and a 2021 Kenworth T3 series refrigerated box truck. The front of the ambulance struck and underrode the left side of the Kenworth. The crash resulted in fatal injuries to the ambulance’s belted 26-yearold male EMT driver and 75 ...
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