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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 521 - 540 of 36053 results
  • Orange Contrasted Temporary Pavement Delineation in Construction Zones
    Orange Contrasted Temporary Pavement Delineation in Construction Zones
    Linke, Barbara ;
    White, Wilderich A.
    2025-03-31 | PDF
    The California Department of Transportation (Caltrans) needs to maintain safety on its roads, including during construction in work zones. Orange temporary striping promises to increase driver awareness of construction work zones. This project collected and analyzed quantitative and subjective data about driver behavior and traffic incidents over t ...
  • Chemical Incident Reports Events Reported to the CSB Under the Accidental Release Reporting Rule Volume 2
    Chemical Incident Reports: Events Reported to the CSB Under the Accidental Release Reporting Rule [Volume 2]
    U.S. Chemical Safety and Hazard Investigation Board
    2025-03-12 | PDF
    Volume 2 covers 25 serious chemical incidents in 14 states: Arkansas, Alabama, California, Colorado, Connecticut, Illinois, Louisiana, Mississippi, Nebraska, Nevada, New Mexico, Ohio, Oklahoma and Texas. These serious incidents resulted in 7 fatalities, 23 serious injuries, and approximately $1 billion in property damage. The reports give the publi ...
  • Project Summary Automated Truck Mounted Attenuator ATMA
    Project Summary: Automated Truck Mounted Attenuator (ATMA)
    Minnesota. Department of Transportation
    2025-03-11 | PDF
    Connected and automated vehicle (CAV) technology has the potential to significantly increase work zone safety. Each day, MnDOT maintenance employees and contractors are at risk of being involved in crashes when performing road work. To mitigate this risk, MnDOT uses truck mounted attenuators – or crash cushions – to help protect roadside workers).
  • Division of Engineering Research OnCall ROC Task 08 Reexamining Level of Service as a Measure of Effectiveness for Roadway Improvements
    Division of Engineering Research On-Call (ROC) Task #08 - Re-examining Level of Service as a Measure of Effectiveness for Roadway Improvements
    Weiss, Jacob ;
    Buckmaster, Morgan
    2025-03-01 | PDF
    This report evaluates the effectiveness of Level of Service (LOS) as a metric for roadway improvements. The study examines alternative measures, such as Vehicle Miles Traveled (VMT) or Vehicle Hours Traveled (VHT) and other Measures of Effectiveness (MOE) to assess roadway performance beyond traditional peak-hour analyses. By analyzing practices fr ...
  • Best Practices for Maintenance of ControlofAccess Fencing
    Best Practices for Maintenance of Control-of-Access Fencing
    Moomen, Milhan ;
    Rahman, Ashifur
    2025-03-01 | PDF
    This report examines the current practices and challenges associated with the maintenance of control-of-access (C-of-A) fencing along highways, with a particular focus on the Louisiana Department of Transportation and Development (DOTD). C-of-A fencing is an essential infrastructure component, designed to enhance the safety, security, and operation ...
  • TRACtion A Research Agenda for Just and Sustainable Transportation
    TRACtion: A Research Agenda for Just and Sustainable Transportation
    Matute, Juan ;
    Engelhardt, Chase
    2025-03-01 | PDF
    This report proposes a new research agenda for transportation sustainability. This agenda emerges from TRACtion: Transformative Research and Collaboration, a new approach to community-researcher collaboration that seeks to match UCLA’s academic expertise with the wisdom and perspectives of community groups and advocacy organizations. It is a partne ...
  • Improving and Communicating Speed Management Practices Workshop Development
    Improving and Communicating Speed Management Practices: Workshop Development
    Fitzpatrick, Kay ;
    Venglar, Steven P.
    2025-03-01 | PDF
    Posted speed limits (PSLs) are a highly complex issue involving engineering, human factors, and political and societal concerns. On a national level, recent research along with calls to change how speed limit are set, especially for city streets, have generated extensive discussion on future speed limit setting procedures. Recent Texas Department o ...
  • Review of the Current Transportation Asset Management Practices in Wyoming
    Review of the Current Transportation Asset Management Practices in Wyoming
    Aleadelat, Waleed ;
    Ksaibati, Khaled
    2025-03-01 | PDF
    WYDOT maintains a vast network consisting of Interstate, NHS and non-NHS roads. The existing infrastructure needs continues maintenance to keep in good condition and safe for users. To achieve this, WYDOT needs a considerable amount of funding every year and anticipates the demand for future maintenance through performance models. This future maint ...
  • Practical Assessment of NonDestructive Testing NDT Techniques for OnSite Application of GDOT Projects
    Practical Assessment of Non-Destructive Testing (NDT) Techniques for On-Site Application of GDOT Projects
    Taheri, Hossein ;
    Hedjazi, Saman
    2025-03-01 | PDF
    Non-destructive testing (NDT) is often conducted to evaluate the performance and condition of assets and infrastructures. Practical considerations must be considered when conducting NDT in the field. This study evaluates the effectiveness and practicality of various NDT methods for inspecting reinforced concrete structures, with a focus on the appl ...
  • Improved Incident Response through Coordinated Interoperable Communications Summary
    Improved Incident Response through Coordinated, Interoperable Communications [Summary]
    Moomen, Milhan ;
    Rahman, Ashifur
    2025-03-01 | PDF
    This study aimed to conduct a needs assessment and performance evaluation of Traffic Incident Management (TIM) in Louisiana and identify areas for TIM improvement. The study also aimed to assess interoperability as a solution to communication gaps. The research team achieved this by performing evaluations and assessments of Louisiana’s TIM and comm ...
  • Division of Engineering ROC 202426 Task 8 Reexamining Level of Service as a Measure of Effectiveness for Roadway Improvements Fact Sheet
    Division of Engineering ROC 2024-26 – Task 8: Re-examining Level of Service as a Measure of Effectiveness for Roadway Improvements [Fact Sheet]
    Weiss, Jacob ;
    Buckmaster, Morgan
    2025-03-01 | PDF
    This report evaluates the effectiveness of Level of Service (LOS) as a metric for roadway improvements. The study examines alternative measures, such as Vehicle Miles Traveled (VMT) or Vehicle Hours Traveled (VHT) and other Measures of Effectiveness (MOE) to assess roadway performance beyond traditional peak-hour analyses. By analyzing practices fr ...
  • Improving and Communicating Speed Management Practices Workshop
    Improving and Communicating Speed Management Practices: Workshop
    Fitzpatrick, Kay ;
    Venglar, Steven P.
    2025-03-01 | PDF
    Posted speed limits (PSLs) are a highly complex issue involving engineering, human factors, and political and societal concerns. On a national level, recent research along with calls to change how speed limit are set, especially for city streets, have generated extensive discussion on future speed limit setting procedures. Recent Texas Department o ...
    Supporting Files
  • MultiDimensional Freight and Trade Capacity Analysis a Case Study on BurhanKhunjerab Route in ChinaPakistan Economic Corridor CPEC
    Multi-Dimensional Freight and Trade Capacity Analysis – a Case Study on Burhan-Khunjerab Route in China-Pakistan Economic Corridor (CPEC)
    Adeel, Muhammad ;
    Khurshid, Muhammad Bilal
    2025-03-01 | PDF
    Trade corridors are critical for fostering global economic growth, reducing transportation costs, and enhancing regional connectivity, yet increasing trade volumes have imposed significant demands on these infrastructures. This study focuses on the Burhan-Khunjerab route, a pivotal section of the China-Pakistan Economic Corridor (CPEC), which conne ...
  • Centerline Buffers on TwoLane Undivided Roadways Technical Brief
    Centerline Buffers on Two-Lane Undivided Roadways [Technical Brief]
    Texas A&M Transportation Institute
    2025-03-01 | PDF
    Research results indicate that 4-ft centerline buffers have a positive effect on reducing opposite-direction crashes on two-lane highways.
  • Risk Assessment Tool Associated with Cost
    Risk Assessment Tool (Associated with Cost)
    Shrestha, K. Joseph ;
    Uddin, Mohammad Moin
    2025-03-01 | PDF
    Computing accurate cost estimates during an early phase of project development is a challenging task because of various project factors such as change in project scope, inflation, site conditions, and market conditions. This study collects and analyzes engineers’ estimates throughout the project development to quantify the changes in estimates over ...
  • Connected and Autonomous Vehicle Readiness Action Plan
    Connected and Autonomous Vehicle Readiness Action Plan
    Toth, Chris ;
    Perry, Frank
    2025-03-01 | PDF
    In this report, the Tennessee Department of Transportation (TDOT) has developed a Connected and Automated Vehicle (CAV) Readiness Action Plan to guide the implementation, operation, and maintenance of CAV technologies at traffic signals and along roadways across the state. Through this action plan, TDOT aims to position Tennessee as a leader in CAV ...
  • Synthesis of Practices to Deter Pedestrians from Crossing Freeways Technical Brief
    Synthesis of Practices to Deter Pedestrians from Crossing Freeways [Technical Brief]
    Texas A&M Transportation Institute
    2025-03-01 | PDF
    The Texas Department of Transportation (TxDOT) has seen an increase in recent years in crashes involving pedestrians crossing freeways and other high-speed roadways. This technical brief summarizes relevant practices found through a literature review, which included a variety of research studies, practitioner interviews and surveys, and published r ...
  • Inspection of Flexible Filler Tendons Summary
    Inspection of Flexible Filler Tendons [Summary]
    Brown, Jeff R.
    2025-03-01 | PDF
    This research focused on developing an inspection protocol for post-tensioning (PT) ducts employing flexible filler materials for corrosion protection in bridge applications. Historically, cementitious grouts (CG) have been used to provide corrosion protection and bonding in PT systems. In contrast, flexible filler systems use wax or grease to main ...
  • Best Practices for Maintenance of ControlofAccess Fencing Summary
    Best Practices for Maintenance of Control-of-Access Fencing [Summary]
    Moomen, Milhan ;
    Rahman, Ashifur
    2025-03-01 | PDF
    This report examines the current practices and challenges associated with the maintenance of control-of-access (C-of-A) fencing along highways, with a particular focus on the Louisiana Department of Transportation and Development (DOTD). C-of-A fencing is an essential infrastructure component, designed to enhance the safety, security, and operation ...
  • Strategic Prioritization in Bridge Asset Maintenance through Data Driven LongTerm Asset Valuation with Additional Emphasis on Promoting GDOTs Partnerships with Counties
    Strategic Prioritization in Bridge Asset Maintenance through Data Driven Long-Term Asset Valuation with Additional Emphasis on Promoting GDOT’s Partnerships with Counties
    Geum Chorzepa, Mi ;
    Durham, Stephan A.
    2025-03-01 | PDF
    This study focuses on engaging local bridge owners through interviews and interactions, aiming to assist them in enhancing their bridge management practices, while also developing resources to support them. Key deliverables include multiple resource guides: a Non-NBI Culvert Inspection Guide, a Weather Stressors Guide, and a Supplementary Guide for ...
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