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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 921 - 940 of 36841 results
  • Truck Parking Shortage Improving Efficiency and Identifying Opportunities Summary
    Truck Parking Shortage: Improving Efficiency and Identifying Opportunities [Summary]
    Stich, Bethany ;
    Rupnow, Tyson
    2025-03-01 | PDF
    In coordination with the American Trucking Association (ATA) and American Transportation Research Institute (ATRI), this project aims to address truck parking issues with short- and long-term solutions. The short-term solution is to identify what truck parking exists, how it is managed, and what and where Variable Message Signage (VMS) exists for t ...
  • Identification of CostEffective Winter Maintenance Chemicals
    Identification of Cost-Effective Winter Maintenance Chemicals
    Hart, Robert ;
    Hershey, Benjamin
    2025-02-28 | PDF
    Research Project SD2022-02 used the Maintenance Decision Support System (MDSS) to simulate the effect of five treatment materials on South Dakota highways and determine the most cost-effective treatment material options in each of the 25 maintenance units in the state. This document reports the results of the simulations and data analyses.
  • 07112 Development of a Continuous for Live Load Prefabricated Steel Accelerated Bridge Construction ABC Unit for Texas Bridges
    0-7112: Development of a Continuous for Live Load Prefabricated Steel Accelerated Bridge Construction (ABC) Unit for Texas Bridges
    Hurlebaus, Stefan ;
    Mander, John
    2025-02-28 | PDF
    This research study developed and evaluated prefabricated steel bridges made continuous for live load utilizing accelerated bridge construction (ABC). The project created a steel ABC transverse connection detail at the bridge piers that allows the structure to behave as simply supported for dead load and continuous for live load. This detail is rel ...
  • Evaluation of Commercial ForwardLooking Infrared Driver Assistance Technology for Use in Emergency Tow Trucks and Snowplows
    Evaluation of Commercial Forward-Looking Infrared Driver Assistance Technology for Use in Emergency Tow Trucks and Snowplows
    Shargh, Mohammad Mahdi Naddaf ;
    Lee, Andrew
    2025-02-28 | PDF
    This report details the development and evaluation of an innovative component in a traffic management system that can enhance road safety during severe weather conditions. Severe weather conditions, such as dense fog, heavy rain, and snow, significantly hinder road safety by reducing visibility and increasing the risk of collisions, particularly fo ...
  • Michigan Department of Transportation Fleet Electrification Strategies
    Michigan Department of Transportation Fleet Electrification Strategies
    Bodarya, Mihir ;
    Dagci, Oguz
    2025-02-28 | PDF
    The Michigan Department of Transportation (MDOT) relies on data to make informed decisions regarding its vehicle fleet, which totals approximately 4,800 units. Recognizing the environmental impact of its operations, MDOT is exploring alternative fuel and electric vehicle technologies to meet its diverse needs. This research, conducted by Hatch, an ...
  • Maintenance Preservation Solution Matrix MPSM
    Maintenance Preservation Solution Matrix (MPSM)
    Premkumar, Laxmikanth ;
    Talha, S. Abu
    2025-02-21 | PDF
    The goal of this study was to identify optimal preventative treatment types and timing of treatments throughout the service life cycles of pavements. The research was carried out in two phases. Phase 1 involved a comprehensive literature review to examine factors that influence the service life of pavements, including treatment application timing, ...
  • Bridges Designed for Minimum Maintenance
    Bridges Designed for Minimum Maintenance
    ElBatanouny, Mohamed K. ;
    Wagner, Elizabeth
    2025-02-11 | PDF
    Service-life based designs of highway bridges have gained significant interest from state DOTs in recent years. The primary purpose of these efforts is to provide durability-based designs for bridges and bridge elements that require minimal maintenance during the targeted service life of the structure. This is achieved by defining different target ...
  • RiskBased Methodology for Structural Evaluation of BridgeSized Culverts
    Risk-Based Methodology for Structural Evaluation of Bridge-Sized Culverts
    Yang, David Y ;
    White, Kevin
    2025-02-07 | PDF
    This report presents the results of the project sponsored by the Federal Highway Administration (FHWA), “Risk-Based Methodology for Structural Evaluation of Bridge-Sized Culverts”. The goal of this project was to develop general methodology to (a) quantify uncertainty, especially live load uncertainty, unique to bridge-sized RC box culverts and (b) ...
  • Interlaboratory Study for the Indirect Tensile at High Temperature Test and Ideal Rutting Test
    Interlaboratory Study for the Indirect Tensile at High Temperature Test and Ideal Rutting Test
    Boz, Ilker ;
    Diefenderfer, Stacey D.
    2025-02-01 | PDF
    The Indirect Tensile at High Temperature (IDT-HT) test and Ideal Rutting (IR) test were recommended for screening rut-susceptible asphalt mixtures in the Balanced Mix Design (BMD) process, based on a research study by the Virginia Transportation Research Council (VTRC). The Virginia Department of Transportation (VDOT) is in the initial stages of im ...
  • 2024 GDOT Employee Survey
    2024 GDOT Employee Survey
    Durham, Stephan A. ;
    DeMeester, Karen
    2025-02-01 | PDF
    The research team which included faculty from University of Georgia’s College of Engineering and Carl Vinson Institute of Government worked in collaboration with the Georgia Department of Transportation (GDOT) to conduct the 2024 GDOT employee survey. This research study aimed to increase the response rate and the usefulness of the feedback from th ...
  • Value of Dedicated RightofWay Transit Service Reliability and User Impacts
    Value of Dedicated Right-of-Way: Transit Service Reliability and User Impacts
    Song, Ying ;
    Zeng, Xiaohuan
    2025-02-01 | PDF
    Transit services connect people to jobs and opportunities, fostering vibrant communities and multimodal travel along service corridors. A transit right-of-way (ROW) can help buses bypass congestion and stay on schedule. Many studies have proved that transit ROWs effectively improve service reliability and reduce user costs. However, these studies o ...
  • A Study of Suburban Arterial Safety Performance Based on Median Type
    A Study of Suburban Arterial Safety Performance Based on Median Type
    Tarko, Andrew P. ;
    Guo, Qiming
    2025-02-01 | PDF
    Suburban arterial roadways must serve two conflicting road functions: regional mobility and access to the abutting land. The potential for conflicts between traffic passing through and traffic accessing road from the neighboring areas could raise safety concerns. Selecting an adequate cross-section is among important decisions that road designers a ...
  • Investigation of Commercial Motor Vehicle CMVRelated Crashes in Ohio Work Zones Fact Sheet
    Investigation of Commercial Motor Vehicle (CMV)-Related Crashes in Ohio Work Zones [Fact Sheet]
    Finley, Melisa D. ;
    Lopez, Nicholas
    2025-02-01 | PDF
    This research project was conducted to identify causation trends and factors that contribute to commercial motor vehicle (CMV)-involved work zone crashes in Ohio. In addition, the research project examined how workspace access points contribute to the CMV crash risk in work zones. In Phase 1, the research team reviewed previous research findings, c ...
  • Use of Geothermal Energy for DeIcing Approach Pavement Slabs and Bridge Decks Phase II
    Use of Geothermal Energy for De-Icing Approach Pavement Slabs and Bridge Decks – Phase II
    Yu, Xinbao ;
    Puppala, Anand J.
    2025-02-01 | PDF
    Bridges in many parts of Texas are prone to icing on the bridge deck during winter events, which poses severe travel disruptions and potential accidents to the drivers. Therefore, bridge deicing is critical to ensure roadway safety, mobility, and productivity reasons. This study tested and implemented a geothermal bridge deicing system (GBDS) as a ...
  • Effects of Additives in Deicing Salts at Lower Temperatures
    Effects of Additives in Deicing Salts at Lower Temperatures
    Fay, Laura ;
    Jamal, Mueed
    2025-02-01 | PDF
    The goal of this project was to investigate the effects of additives commonly used in deicers for winter road maintenance operations, explore the qualitative and quantitative benefits of these additives, laboratory and performance data, impacts, and relative performance to sodium chloride (NaCl). Additionally, evaluate the impact additives have on ...
  • Managing the Traffic Impacts of Highway Infrastructure Constructions A Framework for Construction Planning
    Managing the Traffic Impacts of Highway Infrastructure Constructions: A Framework for Construction Planning
    Liu, Jun ;
    Xu, Ningzhe
    2025-02-01 | PDF
    Highway infrastructure construction projects often necessitate temporary traffic pattern changes, such as lane or road closures, which can impact mobility, safety, and the environment. This report presents a systematic framework and tool designed to assist transportation agencies in evaluating and comparing alternative construction plans. The frame ...
  • Five County Association of Governments Regional Mobility Study
    Five County Association of Governments Regional Mobility Study
    Campoll, Christy
    2025-02-01 | PDF
    The purpose of the Five County Association of Governments (AOG) Regional Mobility Study is to identify options to meet the mobility needs of transportation-disadvantaged individuals in Beaver, Garfield, Iron, Kane, and Washington Counties. The research included a literature review; inventory of transportation providers in the Five County AOG region ...
  • Application of Cementitious Materials and Fiber Reinforcement to Enhance Lime Stabilization for Nebraska Shale Soils
    Application of Cementitious Materials and Fiber Reinforcement to Enhance Lime Stabilization for Nebraska Shale Soils
    Eun, Jongwan ;
    Kim, Seunghee
    2025-02-01 | PDF
    Lime stabilization is a widely used technique to improve weak subgrades; however, its effectiveness under freeze-thaw cycles remains a critical challenge. This study investigates the incorporation of cementitious materials and fiber to enhance the mechanical properties and environmental resistance of lime-stabilized soils under such conditions. Two ...
  • Pavement Rehabilitation and Design Strategy for Heavy Loads in the Energy Development Areas
    Pavement Rehabilitation and Design Strategy for Heavy Loads in the Energy Development Areas
    Zhou, Fujie ;
    Scullion, Tom
    2025-02-01 | PDF
    In recent years, rapid energy development in Texas has caused significant damage to many farm-to-market (FM) roads, which traditionally have a thin asphalt surface layer plus a stabilized base directly over the subgrade. These FM roads performed well under normal traffic loads but failed dramatically under the energy-sector truck loads. There is an ...
  • Electric Vehicles and Socioeconomic Inequity in Access to the Charging Network on Virginia Roads
    Electric Vehicles and Socioeconomic Inequity in Access to the Charging Network on Virginia Roads
    Yoo, Dong Kyoon
    2025-02-01 | PDF
    Electric vehicles (EVs) are becoming attractive to consumers due to their ability to reduce greenhouse gas (GHG) emissions, lower operating costs, and benefit from government incentives. Yet a barrier to EV adoption is the lack of direct current fast charging (DCFC) stations, which contributes to range anxiety. Studies also show that DCFC stations ...
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