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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 1061 - 1080 of 36049 results
  • Striping Program
    Striping Program
    Brown, Henry ;
    Edara, Praveen
    2024-07-01 | PDF
    The use of wider (greater than 4 in) edge line pavement markings is recognized as a proven safety countermeasure by the Federal Highway Administration (FHWA). However, providing wider edge lines can pose challenges due to budget and striping capacity constraints. One strategy that could be used to address the capacity constraints involves reducing ...
  • Automated Interpretation of Culvert Inspection Videos Using AI and Computer Vision
    Automated Interpretation of Culvert Inspection Videos Using AI and Computer Vision
    Mohammadi, Pouria ;
    Rashidi, Abbas
    2024-07-01 | PDF
    Culvert assets play a critical role in ensuring the safe operation of highways. UDOT maintains over 120,000 drainage culverts and storm drain pipes along state highways. To maintain these assets optimally and prevent failures, UDOT must collect comprehensive information about all culverts across the state and inventory them in the ATOM system. Accu ...
  • Developing a CrossAsset Allocation Mechanism
    Developing a Cross-Asset Allocation Mechanism
    Wilcoxson, Jon ;
    Gibson, Bryan
    2024-07-01 | PDF
    The Kentucky Transportation Cabinet (KYTC) has developed several tools and methods to compare the value of proposed projects within specific programs and asset classes, including the Enhanced Bridge Prioritization Index, Enhanced Pavement Prioritization Index, and the Strategic Highway Investment Formula for Tomorrow (SHIFT). Although immensely val ...
  • Evaluation of LowQuality Recycled Concrete Pavement Aggregates for Portland CementTreated Base
    Evaluation of Low-Quality Recycled Concrete Pavement Aggregates for Portland Cement-Treated Base
    Daily, Koby ;
    Jones, Christopher
    2024-07-01 | PDF
    The Kansas Department of Transportation (KDOT) has begun to explore the incorporation of recycled concrete aggregates (RCAs) into portland cement-treated base (PCTB). KDOT currently employs a freeze-thaw method that includes 90 days of curing and 660 freeze-thaw cycles to determine the durability of concrete mixtures for pavements and stabilized ba ...
  • DOT Report to Congress Decarbonizing US Transportation
    DOT Report to Congress: Decarbonizing U.S. Transportation
    United States. Department of Transportation
    2024-07-01 | PDF
    The transportation sector accounts for about one third of U.S. greenhouse gas (GHG) emissions, more than any other individual sector of the economy. Decarbonizing transportation is critical to addressing the climate crisis and meeting the national goal of net-zero GHG emissions by 2050 and the interim target of 50-52 percent below 2005 levels by 20 ...
  • Review of LowClearance Early Warning Device Options for Illinois
    Review of Low-Clearance Early Warning Device Options for Illinois
    Sai, Shang ;
    Ouyang, Yanfeng
    2024-07-01 | PDF
    Bridge or tunnel strikes by over-height vehicles are a challenge to the transportation industry. This problem causes significant economic and social losses to the transportation industry. Low-clearance detection warning (LCDW) is one of the important technological means to address this issue. This research project was sponsored by Illinois Departme ...
  • DataDriven Approaches for Transit Capital Planning
    Data-Driven Approaches for Transit Capital Planning
    Gonzales, Eric J. ;
    Armstrong, Price
    2024-07-01 | PDF
    Transparent and repeatable processes are needed to forecast needs and prioritize capital investments across 15 Regional Transit Authorities (RTAs) in Massachusetts for the Capital Investment Plan (CIP). The MassDOT Rail and Transit Division (RTD) must allocate scarce capital funding to the RTAs by selecting capital projects for inclusion in the Sta ...
  • North Dakota Statewide Traffic Safety Survey 2024 Traffic Safety Performance Measures for State and Federal Agencies
    North Dakota Statewide Traffic Safety Survey, 2024: Traffic Safety Performance Measures for State and Federal Agencies
    Vachal, Kimberly ;
    Kubas, Andrew
    2024-07-01 | PDF
    The United States trails other developed countries in several transportation safety metrics. One metric, road traffic death rate, is higher than in other developed countries (World Health Organization 2024) (Figure 1.1). Progress has been made to reduce the number of traffic-related fatalities, but crashes resulting in death, injury, and property d ...
  • Developing a Hazard Detection and Alert System To Prevent Incidents Research Summary
    Developing a Hazard Detection and Alert System To Prevent Incidents [Research Summary]
    Song, Sejun
    2024-07-01 | PDF
    In this study, the project team aimed to develop a cost-effective, user-friendly, adaptable, accurate, and reliable bi-directional warning system that leveraged advanced Bluetooth-based device-to-device direct communication (beacon) technologies tailored for work zones. This system incorporated a lightweight wearable proximity sensor, a beacon comm ...
  • Assessing the Flood Reduction Benefits of OnRoad Structures Tech Transfer Summary
    Assessing the Flood Reduction Benefits of On-Road Structures [Tech Transfer Summary]
    Weber, Larry ;
    Arenas Amado, Antonio
    2024-07-01 | PDF
    Iowa lacks a detailed statewide geospatial database identifying which existing culverts are suitable candidates for conversion to ORS. Additionally, a HUC12-scale assessment of the potential for peak flow reductions offered by a system of ORS has not yet been conducted. To address these gaps, this project integrated geographic information system (G ...
  • The Grand Iron Range CAV Initiative History Partnerships and Community Engagement
    The Grand Iron Range CAV Initiative: History, Partnerships, and Community Engagement
    Douma, Frank ;
    Weiner, Evelyn
    2024-07-01 | PDF
    In fall 2022, a first-of-its-kind connected and automated vehicle (CAV) pilot program called goMARTI (Minnesota’s Autonomous Rural Transit Initiative) was launched as a collaborative effort between numerous partners. The 18-month pilot offers free, on-demand rides to area residents and visitors using five autonomous shuttle vans (including three wh ...
  • OSTR Research Roundup Newsletter July 2024
    OST-R Research Roundup Newsletter: July 2024
    United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
    2024-07-01 | OST-R Research Roundup | PDF
    News from across OST-R and its research community.
  • Evaluation of Corrosion Prevention and Mitigation Approaches Used on Texas BridgesVolume 2 Reinforced Concrete Bridges
    Evaluation of Corrosion Prevention and Mitigation Approaches Used on Texas Bridges—Volume 2: Reinforced Concrete Bridges
    Hurlebaus, Stefan ;
    Birely, Anna C.
    2024-07-01 | PDF
    Corrosion in reinforced concrete is a self-accelerating process. As rust forms on steel, it enlarges in size and exerts tension on concrete, causing cracks and further corrosion in steel. The Texas Department of Transportation spends millions of dollars every year for repair and maintenance of concrete bridges; thus, a comprehensive study is essent ...
  • Traffic Safety Facts 2022 Data Young Drivers
    Traffic Safety Facts 2022 Data: Young Drivers
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-07-01 | PDF
    In 2022 there were 2,034 young drivers who died in traffic crashes, a 5-percent decrease from 2,133 in 2021. The number of licensed young drivers increased by 0.3 percent from 2021 to 2022. In 2022 there were an estimated 180,353 young drivers injured in traffic crashes, a decrease of 11 percent from 203,276 in 2021. The term young driver refers to ...
  • Local Verification of AASHTOWareTM Pavement ME Design for Flexible Pavement
    Local Verification of AASHTOWareTM Pavement ME Design for Flexible Pavement
    Tran, Nam ;
    Ajede, Akeem
    2024-07-01 | PDF
    This research project conducted a local verification to assess the accuracy of globally calibrated Pavement ME Design distress and smoothness models for asphalt pavements in Alabama. Pavement sections included LTPP test sections in Alabama and neighboring states, as well as sections tested at the NCAT Test Track. Results showed significant bias in ...
  • Pavement Markings To Support Automated Vehicles Research Summary
    Pavement Markings To Support Automated Vehicles [Research Summary]
    Peterson, Ethan ;
    Pike, Adam
    2024-07-01 | PDF
    Pavement marking style and patterns have largely been designed based on human vision. MnDOT is completing a human factors study on pavement marking variations, A field study included data collected through various methods from test corridors in Minnesota and Texas during daytime and nighttime driving. A closed course at Texas A&M University allowed ...
  • Estimating the AsPlaced Grout Volume of Auger Cast Piles Part 1
    Estimating the As-Placed Grout Volume of Auger Cast Piles – Part 1
    Mullins, Gray ;
    Mee, Tristen
    2024-07-01 | PDF
    Auger cast piles have historically been used for private industry applications but not publicly funded infrastructure projects supporting bridge structures largely due to the lack of quantifiable quality assurance and quality controls. The development of computerized on-board drill rig monitoring systems and thermal integrity methods for auger cast ...
  • MiniRoundabout FAQs
    Mini-Roundabout FAQs
    Marti, Michael ;
    Heimer, Zach
    2024-07-01 | PDF
    Roundabouts have been effective at increasing safety and efficiency of vehicle traffic. Traditional roundabout design typically requires a larger “footprint” than a traditional four-way intersection. Over the past few years, more and more agencies are implementing “mini roundabouts,” a type of roundabout characterized by a small diameter that can i ...
  • Field Handbook for Maintenance and Preservation Treatments of Concrete Pavements
    Field Handbook for Maintenance and Preservation Treatments of Concrete Pavements
    Mirzahosseini, Mohammadreza ;
    Olek, Jan
    2024-07-01 | PDF
    Information related to maintenance and preservation (M&P) treatments of Portland cement concrete pavement (PCCP) has not been uniformly presented across various Indiana Department of Transportation (INDOT) maintenance-related documents, including INDOT Standard Specifications and the INDOT Design Manual. Since this data is scattered across differen ...
  • Traffic Safety Facts 2022 Data RuralUrban Traffic Fatalities
    Traffic Safety Facts 2022 Data: Rural/Urban Traffic Fatalities
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2024-07-01 | PDF
    Of the 42,514 motor vehicle traffic fatalities in 2022, there were 17,283 (41%) that occurred in rural areas, 25,023 (59%) in urban areas, and 208 (less than 1%) in areas that were not reported as rural or urban. In 2022, traffic fatalities in rural areas decreased slightly from 17,339 in 2021 to 17,283, and in urban areas decreased by 3 percent fr ...
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