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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 801 - 820 of 36841 results
  • Evaluation of WrongWay Driving Countermeasures at Kansas Urban and Rural Interstate Ramps
    Evaluation of Wrong-Way Driving Countermeasures at Kansas Urban and Rural Interstate Ramps
    Cunningham IV, Jack R ;
    Anderson, Samantha
    2025-05-01 | PDF
    Wrong-way driving (WWD) incidents and crashes are a serious concern for communities throughout the United States. WWD events typically occur at high travel speeds during low light conditions on roadways with limited horizontal maneuverability. These variables reduce driver reaction times and, in conjunction with other human factor variables that ca ...
  • Improving Maintenance of OpenGraded Friction Course in Louisiana
    Improving Maintenance of Open-Graded Friction Course in Louisiana
    Mayeux, Corey R ;
    Akentuna, Moses
    2025-05-01 | PDF
    Open-Graded Friction Course (OGFC) is a specialized asphalt concrete mixture used for thin-wearing courses, offering significant safety, economic, and environmental benefits. The porous structure of OGFC enhances drainage, reduces hydroplaning, and improves road visibility, particularly during wet weather conditions. Despite its potential advantage ...
  • Transportation Operations Center Operator Retention and Workload Mitigation Strategies
    Transportation Operations Center Operator Retention and Workload Mitigation Strategies
    Goodall, Noah J.
    2025-05-01 | PDF
    This study investigated strategies to mitigate the workload for and improve the retention of operators at the Virginia Department of Transportation’s (VDOT) Transportation Operations Centers (TOCs). The research involved a literature review, interviews with other state departments of transportation, observations of VDOT TOC operations, and intervie ...
  • A Playbook For CMGC Adoption in Transportation Projects
    A Playbook For CM/GC Adoption in Transportation Projects
    Pishdad, Pardis
    2025-05-01 | PDF
    The Construction Manager/General Contractor (CM/GC) project delivery method is gaining widespread adoption in the transportation sector due to its ability to integrate construction expertise early in the project lifecycle. This report serves as a playbook for CM/GC adoption in transportation projects, specifically tailored for the Georgia Departmen ...
  • Evaluation of WrongWay Driving Countermeasures at Kansas Urban and Rural Interstate Ramps Summary
    Evaluation of Wrong-Way Driving Countermeasures at Kansas Urban and Rural Interstate Ramps [Summary]
    Cunningham IV, Jack R ;
    Anderson, Samantha
    2025-05-01 | PDF
    Wrong-way driving (WWD) incidents and crashes are a serious concern for communities throughout the United States. WWD events typically occur at high travel speeds during low light conditions on roadways with limited horizontal maneuverability. These variables reduce driver reaction times and, in conjunction with other human factor variables that ca ...
  • Using the Transportation Security Index to Measure the Impact of Mobility Initiatives
    Using the Transportation Security Index to Measure the Impact of Mobility Initiatives
    Murphy, Alexandra K.
    ORCID ICON IMG
    2025-05-01 | PDF
    Using the Transportation Security Index to measure the impact of mobility initiatives.
  • Benchmarking Delta TC Tc for Wisconsin Materials
    Benchmarking Delta TC (∆Tc) for Wisconsin Materials
    Bennert, Thomas A. ;
    Rowe, Geoffrey
    2025-05-01 | PDF
    The purpose of the study was to evaluate the ΔTc parameter for potential inclusion in the WisDOT asphalt binder specifications for cracking potential. The research encompassed a literature review and extensive laboratory program consisting of both asphalt binder and mixture testing. Using the information and data collected, it was determined that Δ ...
  • SDDOT 2025 Statewide Customer Satisfaction Assessment
    SDDOT 2025 Statewide Customer Satisfaction Assessment
    Murray, Ryan
    2025-05-01 | PDF
    This report summarizes perceptions of the South Dakota Department of Transportation’s performance in delivering services to residents and key customer groups across South Dakota. It is the 10th in a series of surveys that track and monitor attitudes and needs among SDDOT customers, including the general public, farmers, emergency vehicle operators, ...
  • Low Shrinkage Concrete Mixtures for Arkansas
    Low Shrinkage Concrete Mixtures for Arkansas
    Ouoba, Shuyah ;
    Murray, Cameron D.
    2025-05-01 | PDF
    Drying shrinkage-induced cracking is a major concern for concrete bridge decks, compromising both durability and service life. This study, conducted for the Arkansas Department of Transportation (ARDOT), aimed to develop and evaluate low-shrinkage concrete mixtures using locally available aggregates. A literature review identified effective shrinka ...
  • Investigating the Extent of WrongWay Driving Events and Identifying WrongWay Driving Hotspot Roadway Segments and Lone Wolf Exits with High WrongWay Driving Risk on Idaho HighSpeed Roadways
    Investigating the Extent of Wrong-Way Driving Events and Identifying Wrong-Way Driving Hotspot Roadway Segments and Lone Wolf Exits with High Wrong-Way Driving Risk on Idaho High-Speed Roadways
    Al-Deek, Haitham ;
    Sandt, Adrian
    2025-05-01 | PDF
    This project investigated the extent and characteristics of wrong-way driving (WWD) on Idaho limited access roadways. WWD crash (WWC) counts have been increasing in recent years, especially on I-84 and I-90. A model was developed to identify WWD hotspot segments by predicting WWCs based on non-crash WWD citations, exit design characteristics, traff ...
  • Demonstrating the Use of Small Uncrewed Aircraft Systems Drones Capabilities and Data for Iowa Transportation and Infrastructure Work Pilot Project No 1 Use of Small Uncrewed Aircraft Systems for Hairline Crack Detection on Bridge Deck
    Demonstrating the Use of Small Uncrewed Aircraft Systems (Drones) Capabilities and Data for Iowa Transportation and Infrastructure Work: Pilot Project No. 1 – Use of Small Uncrewed Aircraft Systems for Hairline Crack Detection on Bridge Deck
    Oguntoye, Kunle ;
    Sourav, Md Abdullah All
    2025-05-01 | PDF
    The increasing use of small uncrewed aircraft systems (sUAS), also known as drones, significantly benefits transportation agencies through reduced costs, enhanced safety, and improved productivity. The Iowa Department of Transportation (DOT) desires to use this technology in routine engineering practices, and this pilot study evaluated the effectiv ...
  • Bridge Inspection Using Augmented Reality and Artificial Intelligence
    Bridge Inspection Using Augmented Reality and Artificial Intelligence
    Gabbard, Joe ;
    Sarlo, Rodrigo
    2025-05-01 | PDF
    Bridge inspections are critical for maintaining infrastructure safety and reliability, requiring inspectors to conduct thorough evaluations of structural components and document their conditions. However, traditional inspection workflows rely heavily on manual measurement and data entry, which introduces inefficiencies, inconsistencies, and transcr ...
  • Asset Condition Assessment Using AI and Computer Vision
    Asset Condition Assessment Using AI and Computer Vision
    Mashhadi, Ali ;
    Black, Clancy W.
    2025-05-01 | PDF
    UDOT faces significant challenges in manually inspecting roadside safety assets across its extensive roadway network, prompting the need for automated condition assessment solutions. This project leverages street-level image data to develop an AI-driven framework for assessing primary assets (guardrails, cable barriers, concrete barriers) and secon ...
  • Construction Cost Inflation Model
    Construction Cost Inflation Model
    Colsch, Nick
    2025-05-01 | PDF
    Federal legislation requires state departments of transportation to consider and apply inflation to the costs of transportation projects. However, there is no guidance on how inflation should be calculated. Previous research on this topic primarily focused on developing construction cost indexes. Previous methods of prediction included neural netwo ...
  • Construction Cost Inflation Model Data Management Plan
    Construction Cost Inflation Model: Data Management Plan
    Colsch, Nick
    2025-05-01 | PDF
    Federal legislation requires state departments of transportation to consider and apply inflation to the costs of transportation projects. However, there is no guidance on how inflation should be calculated. Previous research on this topic primarily focused on developing construction cost indexes. Previous methods of prediction included neural netwo ...
  • Explore the Use of TeleOperated or Autonomous Vehicles TAVs in Active Incident Management
    Explore the Use of Tele-Operated or Autonomous Vehicles (TAVs) in Active Incident Management
    Agarwal, Nithin ;
    Sagar, Shraddha
    2025-05-01 | PDF
    This report documents the development, testing, and evaluation of a Remotely Controlled Truck-Mounted Attenuator (RCTMA) system designed to enhance roadside responder safety through tele-operated vehicle deployment. Built on Kratos's ATMA platform, the RCTMA integrates servo-controlled steering, throttle, and braking with 360° video monitoring and ...
  • Investigating the Longterm Frictional Properties and Establishing Aggregate Polishness Guidelines for Asphalt Surface Mixtures in Tennessee
    Investigating the Long-term Frictional Properties and Establishing Aggregate Polishness Guidelines for Asphalt Surface Mixtures in Tennessee
    Huang, Baoshan ;
    Zhong, Jingtao
    2025-04-30 | PDF
    The frictional properties of aggregates play a significant role in determining pavement skid resistance. To preserve natural aggregates, reclaimed asphalt pavement (RAP) has been widely used for decades. However, its application in pavement surface courses is restricted due to uncertainties about its frictional properties and other mechanical perfo ...
  • 07199 Identification of Needs and Strategies for First Responder Interactions with Automated Vehicles Summary
    0-7199: Identification of Needs and Strategies for First Responder Interactions with Automated Vehicles [Summary]
    Trefz, Bradley ;
    Ivie, Ray
    2025-04-30 | PDF
    The rapid deployment of automated vehicles (AVs) presents both opportunities and challenges, especially for first responders tasked with ensuring public safety during emergencies. This project addressed critical needs and strategies for interactions between first responders and AVs. The project sought to identify the needs and strategies for Texas ...
  • Impacts of Changing Agriculture Supply Chains on California Roads and Bridges
    Impacts of Changing Agriculture Supply Chains on California Roads and Bridges
    Chandra, Shailesh ;
    Herrera, Benny
    2025-04-28 | PDF
    Agriculture is a significant contributor to national, state, and regional economies. In 2020, California generated approximately $49.1 billion in agricultural cash receipts, comprising 13.7 percent of the nation (CA number 1). During the same year, agricultural production and processing industries accounted for 2.8 percent of the state's gross dome ...
  • Development and Testing of an Unmanned Aerial System UAS Cellular Wi Fi Repeater Phase 2
    Development and Testing of an Unmanned Aerial System (UAS) Cellular & Wi Fi Repeater: Phase 2
    Sim, Evan ;
    Duong, Anh
    2025-04-28 | PDF
    This report is part of AHMCT's research project "Development and Testing of an Unmanned Aerial System (UAS) Cellular & Wi Fi Repeater: Phase 2." The goal of this research is to expand upon the successful UAS aerial repeater that was created in Task 3280. The researchers evaluated several commercial off-the-shelf (COTS) vehicle routers and antennas ...
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