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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 241 - 260 of 35438 results
  • 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 ...
  • 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 ...
  • 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 ...
  • Improving Maintenance of OpenGraded Friction Course in Louisiana Summary
    Improving Maintenance of Open-Graded Friction Course in Louisiana [Summary]
    Mayeux, Corey R
    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 ...
  • Joint Deterioration Synthesis Project Capsule
    Joint Deterioration Synthesis [Project Capsule]
    Hungria, Ricardo
    2025-05-01 | PDF
    Concrete pavements are built with joints to accommodate for shrinkage and to induce cracking in control locations. Proper joint type selection and application are key for adequate concrete pavement performance. Nevertheless, various challenges have been identified, including joint sealant loss, loss of subgrade support, joint faulting, poor load tr ...
  • Drainage Area Limitations of Single Watershed Peak Flow Estimates from NRCS Methods
    Drainage Area Limitations of Single Watershed, Peak Flow Estimates from NRCS Methods
    Maughan, Timothy A ;
    Hotchkiss, Rollin H.
    2025-05-01 | PDF
    Most state Department of Transportation roadway design sections predict peak flow for culvert design using, amongst other approaches, Natural Resources Conservation Service (NRCS) TR-20 technology. Even though this technology is more than 50 years old, there are no clear guidelines for how large a single watershed drainage area may be while remaini ...
  • 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 ...
  • A Scheduling Assistant Toolkit for GDOTs Effective Planning of Transportation Projects
    A Scheduling Assistant Toolkit for GDOT’s Effective Planning of Transportation Projects
    Pishdad, Pardis ;
    de la Garza, Jesus M
    2025-05-01 | PDF
    The Scheduling Assistant Toolkit was developed to enhance the Georgia Department of Transportation’s (GDOT) project scheduling efficiency by providing data-driven recommendations on optimal activity overlapping strategies. Traditional scheduling methods often rely on finish-to-start dependencies, leading to unnecessarily long project durations and ...
  • 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 ...
  • Harnessing Solar Energy through Solar Snow Fence Implementation
    Harnessing Solar Energy through Solar Snow Fence: Implementation
    Yang, Mijia ;
    Yu, Yao
    2025-05-01 | PDF
    A 100-ft field implementation of the proposed solar snow fence was conducted In Glyndon, MN. The implementation process started with the manufacturing of solar stripe frames, U connection with steel posts, helical piling, electrical power harvest and storage, electrical use in snow melting, and monitoring of the solar snow fence systems. A 12-ft la ...
  • Improving Safety for People Walking and Biking at Roundabouts
    Improving Safety for People Walking and Biking at Roundabouts
    Savolainen, Peter T. ;
    Gates, Tim J
    2025-05-01 | PDF
    Roundabouts have been shown to enhance safety by lowering travel speeds as compared to other intersection designs. However, pedestrian and bicyclist crossings at roundabouts present unique challenges. Low yielding rates can heighten the risk of crashes, especially at entry and exit points. This study examines driver yielding behavior toward pedestr ...
  • Tools for Capital Improvement Planning
    Tools for Capital Improvement Planning
    Minnesota Local Road Research Board
    2025-05-01 | PDF
    This guide was developed to help Minnesota local agencies better understand and compare Capital Improvement Planning (CIP) software tools. The guide summarizes key features, functionalities, and support offerings across several CIP-related solutions, based on vendor-provided information and publicly available materials. The Technical Advisory Panel ...
  • Evaluation of Stripping Tests for Asphalt Mixtures to Replace AASHTO T283 Method in Missouri
    Evaluation of Stripping Tests for Asphalt Mixtures to Replace AASHTO T283 Method in Missouri
    Buttlar, William G. ;
    Rath, Punyaslok
    2025-05-01 | PDF
    Currently, many paving agencies in the U.S. including the Missouri Department of Transportation (MoDOT) use the AASHTO T283 method (Tensile Strength Ratio (TSR) test) to determine the moisture damage susceptibility of asphalt mixtures. However, the TSR test has been shown to have a poor correlation with field results based on a review of literature ...
  • Evaluation of Stripping Tests for Asphalt Mixtures to Replace AASHTO T283 Method in Missouri Research Summary
    Evaluation of Stripping Tests for Asphalt Mixtures to Replace AASHTO T283 Method in Missouri [Research Summary]
    Buttlar, William G.
    2025-05-01 | PDF
    Currently, many paving agencies in the U.S. including the Missouri Department of Transportation (MoDOT) use the AASHTO T283 method (Tensile Strength Ratio (TSR) test) to determine the moisture damage susceptibility of asphalt mixtures. However, the TSR test has been shown to have a poor correlation with field results based on a review of literature ...
  • First Responder Interactions with Automated Vehicles An Identification of Needs and Strategies
    First Responder Interactions with Automated Vehicles: An Identification of Needs and Strategies
    Trefz, Bradley ;
    Ivie, Ray
    2025-05-01 | PDF
    The rapid deployment of automated vehicles presents both opportunities and challenges, especially for first responders tasked with ensuring public safety during emergencies. This research project, led by the Texas A&M Transportation Institute, in partnership with the Texas A&M Engineering Extension, addressed critical needs and strategies for inter ...
  • Impact of Heavy Commercial Electric Vehicles on Flexible Pavements
    Impact of Heavy Commercial Electric Vehicles on Flexible Pavements
    Jayme, Angeli ;
    Hernandez, Jaime
    2025-05-01 | PDF
    Heavy-duty electric vehicles (HDEV) pose challenges to flexible pavements. This study evaluated four Illinois pavement structures to quantify HDEV impacts on pavements. Compounding factors included increases in load and acceleration, which escalated critical strains and reduced repetitions to failure. Various distresses were considered: bottom-up c ...
  • Development of the Texas Freight Flow Model TFFM Application A Tool for Assessing Impacts of Changes in Freight Flows on the Texas Highway Freight Network
    Development of the Texas Freight Flow Model (TFFM) Application: A Tool for Assessing Impacts of Changes in Freight Flows on the Texas Highway Freight Network
    Morgan, Curtis A. ;
    Sivaraman, Vijayaraghavan
    2025-05-01 | PDF
    Texas Department of Transportation (TxDOT) Project 0-7037 was initiated to develop a model/tool that could help TxDOT and other transportation planners estimate and assess impacts of changes in freight traffic flow on the Texas Highway Freight Network more quickly than by conducting a full Statewide Analysis Model run. The goal was to produce a too ...
  • Improving Guidance for Speed Safety Camera
    Improving Guidance for Speed Safety Camera
    Figliozzi, Miguel ;
    Wang, Haizhong
    2025-05-01 | PDF
    This report synthesizes speed safety camera elements, issues, best practices, and evidence-based results identified from a national and international review of jurisdictions employing speed safety cameras. Using these findings, this report provides recommendations to ODOT on changes and additions to the statewide speed safety camera program, as wel ...
  • Avoiding and Minimizing Impacts to Aquatic Resources through Construction Design Standards
    Avoiding and Minimizing Impacts to Aquatic Resources through Construction Design Standards
    Swedberg, Dusty A ;
    Willink, Phillip W
    2025-05-01 | PDF
    The primary objective was to summarize best management practices that avoid and minimize impacts on aquatic resources through construction design standards. The study involved a literature review and discussions with experts to identify knowledge gaps regarding the effects of road and bridge construction on aquatic resources. We examined how other ...
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