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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 461 - 480 of 35811 results
  • 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 ...
  • Improved Incident Response through Coordinated Interoperable Communications
    Improved Incident Response through Coordinated, Interoperable Communications
    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 ...
  • 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 ...
  • 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 ...
  • NonMotorized Count Program and Risk Factors Assessment
    Non-Motorized Count Program and Risk Factors Assessment
    Tien, Iris ;
    Watkins, Kari E.
    2025-03-01 | PDF
    Non-motorized volumes at different locations in a transportation network are important data for understanding safety and travel needs for people who bike and walk. In Georgia, however, there are limited data about non-motorized volumes in transportation systems given, and in general, these modes volumes are difficult to predict due to high variabil ...
  • 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 ...
  • 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 ...
  • Review of the Current Transportation Asset Management Practices in Wyoming Data Management Plan
    Review of the Current Transportation Asset Management Practices in Wyoming [Data Management Plan]
    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 ...
  • TMA Truck Safety
    TMA Truck Safety
    Edara, Praveen K. ;
    Qing, Zhu
    2025-03-01 | PDF
    This study evaluates the effectiveness of in-vehicle safety countermeasures in reducing injury risk for TMA (Truck-Mounted Attenuator) truck occupants during collisions. With increasing incidents involving TMAs in work zones, understanding the protective impact of advanced safety features has become crucial. A review of historical TMA crash reports ...
  • TMA Truck Safety Research Summary
    TMA Truck Safety [Research Summary]
    Edara, Praveen K.
    ORCID ICON IMG
    2025-03-01 | PDF
    This study evaluates the effectiveness of in-vehicle safety countermeasures in reducing injury risk for TMA (Truck-Mounted Attenuator) truck occupants during collisions. With increasing incidents involving TMAs in work zones, understanding the protective impact of advanced safety features has become crucial. A review of historical TMA crash reports ...
  • 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
  • Comparison of Compost and Proprietary Soil Amendments for Vegetation Establishment
    Comparison of Compost and Proprietary Soil Amendments for Vegetation Establishment
    Cetin, Bora ;
    Saltali, Oguzhan
    2025-03-01 | PDF
    Post-construction roadside soils often suffer from compaction, low fertility, and poor structure, challenging vegetation establishment and stormwater management. This study evaluates the effectiveness of organic amendments (OAs) and proprietary amendments as alternatives to traditional methods. The study involves greenhouse experiments (pot and mes ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Development of a Worker Safety Assessment Risk Identification and Control Program for ALDOT
    Development of a Worker Safety Assessment, Risk Identification, and Control Program for ALDOT
    Zech, Wesley C. ;
    Kirby, Jason
    2025-03-01 | PDF
    This research examines the safety challenges faced by Transportation Maintenance Technicians (TMTs) at the Alabama Department of Transportation (ALDOT). By analyzing extensive injury data from 2009 to 2024, along with insights from surveys and interactions with ALDOT personnel, this effort highlights significant trends and relationships among injur ...
  • Development of Measures for Highway Criticality Assessment
    Development of Measures for Highway Criticality Assessment
    Zhang, Xu ;
    Chen, Mei
    2025-03-01 | PDF
    Existing network criticality assessments, often biased towards heavily used highways in populous areas by incorporating traffic and sociodemographic attributes, can lead to an underestimation of the vital role of rural infrastructure. Consequently, rural highways, particularly low-volume roads, often receive less consideration despite their critica ...
  • 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 ...
  • Gravel Road Performance Enhancements
    Gravel Road Performance Enhancements
    Cetin, Bora ;
    Cetin, Kristen
    2025-03-01 | PDF
    Nearly 30% of roads in the U.S. are unpaved, significantly impacting rural connectivity with Nebraska alone having approximately 75% unpaved roads. This study systematically evaluates local materials to improve gravel road performance, reduce maintenance frequency, and decrease financial burdens on counties. Survey responses revealed that nearly 70 ...
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