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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 441 - 460 of 35811 results
  • Increasing Regional Truck Freight Planning in Virginia
    Increasing Regional Truck Freight Planning in Virginia
    Miller, John S ;
    Parambil, Nishara Vavitta
    2025-03-01 | PDF
    Although the forecast rate of growth for truck vehicle miles traveled is roughly double the forecast rate of growth for passenger vehicle miles traveled, specific planning techniques to address truck freight planning needs are not widely known. Accordingly, to elevate the importance of truck freight within the regional planning process, this study ...
    Supporting Files
  • Advanced 59GHz Interference Resiliency for Connected Vehicle Equipment
    Advanced 5.9GHz Interference Resiliency for Connected Vehicle Equipment
    Kihei, Billy ;
    Grow, James
    2025-03-01 | PDF
    In this work the research team reports on the effectiveness of various techniques to mitigate Wi-Fi 5 interference on Vehicle-to-Everything communications and provide a means to reliably detect Wi-Fi 5 interference. Following previous work conducted in RP 22-18, the research team performed three research investigations in this new work. The first i ...
  • Performance and Improvement of Texas Poor Boy Continuous Bridge Deck Details Final Report
    Performance and Improvement of Texas Poor Boy Continuous Bridge Deck Details: Final Report
    Birely, Anna C. ;
    Yarnold, Matthew T.
    2025-03-01 | PDF
    The majority of bridges in Texas are constructed with girders as simple spans. A simple-span deck requires expansion joints, which are sources of maintenance and durability issues. To avoid this, continuous decks, known as “poor boy joints” in Texas Department of Transportation (TxDOT) bridges, are an attractive option. These details are commonly k ...
  • Setting Speed Limits Spanish Version
    Setting Speed Limits: Spanish Version
    Texas A&M Transportation Institute
    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 ...
  • Setting Speed Limits English Version
    Setting Speed Limits: English Version
    Texas A&M Transportation Institute
    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 ...
  • Evaluate Performance of Sealers and Coatings Applied to TxDOT Bridge Substructures
    Evaluate Performance of Sealers and Coatings Applied to TxDOT Bridge Substructures
    Mukhopadhyay, Anol K. ;
    Mistri, Abhijit
    2025-03-01 | PDF
    Protecting concrete bridge substructures against deterioration over time is an important aspect of bridge preservation, and it is routinely conducted by state departments of transportation. The application of coatings and sealers to protect bridge substructure concrete from corrosion is a common practice. However, a laboratory-based performance eva ...
  • 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 ...
  • Centerline Buffers on FourLane Undivided Roadways Technical Brief
    Centerline Buffers on Four-Lane Undivided Roadways [Technical Brief]
    Texas A&M Transportation Institute
    2025-03-01 | PDF
    Research results indicate that 4-ft centerline buffers on four-lane highways are highly effective in reducing lane departure crashes.
  • Technical Assistance for Quantifying Emissions from Asphalt Mixtures
    Technical Assistance for Quantifying Emissions from Asphalt Mixtures
    Sadeghi, M ;
    Bairgi, B K
    2025-03-01 | PDF
    This study evaluated the effects of using Warm Mix Asphalt (WMA) technologies to reduce asphalt production temperatures on energy consumption and pavement performance in Alabama. Two field experiments were conducted. The first compared two chemical WMA mixtures to a conventional Hot Mix Asphalt (HMA), while the second used one of the WMA technologi ...
  • A Synthesis of Economic Impact Assessment of Transit Services Brief
    A Synthesis of Economic Impact Assessment of Transit Services [Brief]
    Peng, Zhong-Ren
    2025-03-01 | PDF
    This report provides an in-depth synthesis of the economic impact assessment of transit services in the United States from 2003 to 2023, focusing on Benefit-Cost Analysis (BCA) and Economic Impact Analysis (EIA) methodologies. It examines their application in public transit systems and highlights geographical variations and trends. The report analy ...
  • Determining the Effect on Asphalt Mixture Performance by Increasing New Asphalt Binder Content Due to Inactive RAP Binder in the Mixture Brief
    Determining the Effect on Asphalt Mixture Performance by Increasing New Asphalt Binder Content Due to Inactive RAP Binder in the Mixture [Brief]
    Yin, Fan
    2025-03-01 | PDF
    The project aimed to determine the impact of adding additional virgin binders in consideration of recycled binder availability (RBA) on the performance of asphalt mixtures containing reclaimed asphalt pavements (RAP). To that end, a literature review was first conducted to select a suitable RBA value (i.e., 80%) for RBA mixtures in Florida, followe ...
  • Steel Bridge Coating and Recoating Warranty Requirements Brief
    Steel Bridge Coating and Recoating Warranty Requirements [Brief]
    Padilla, Felix ;
    Ault, Pete
    2025-03-01 | PDF
    The service life of steel bridge coatings in Florida is occasionally shorter than the intended design life, resulting in the need for increased maintenance painting. This project examined the value of warranty terms potentially included in painting contracts to improve the quality and durability of steel bridge coatings. The research found that the ...
  • 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.
  • 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 ...
  • 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 ...
  • 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 ...
  • Complete Streets Means Trucks too Integrating Freight Traffic Needs with Active Transportation Planning and Policy Summary
    Complete Streets Means Trucks, too: Integrating Freight Traffic Needs with Active Transportation Planning and Policy [Summary]
    Tolford, Tara
    2025-03-01 | PDF
    The objective of this planning-level study is to analyze a range of observed and anticipated conflicts among road users; define stakeholder-identified gaps in data and guidance for Complete Streets implementation with respect to the integration of freight activities; and develop planning, policy, and design recommendations to mitigate safety and op ...
  • 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 ...
  • Superabsorbent Polymer in Concrete to Improve Durability
    Superabsorbent Polymer in Concrete to Improve Durability
    Zhou, Bo ;
    Taylor, Peter
    2025-03-01 | PDF
    The main objective of this research was to explore the optimized selection of superabsorbent polymer (SAP) products as internal curing materials in concrete and to examine the effects of the use of eight selected SAPs on properties that affect concrete performance, including shrinkage, hydration, permeability, and strength. Experimental results dem ...
  • Ebike Lending Libraries Trends and Practices in The United States
    E-bike Lending Libraries: Trends and Practices in The United States
    MacArthur, John ;
    Miller, Joshua
    2025-03-01 | PDF
    E-bike lending libraries are emerging as a potential tool to promote sustainable transportation, reduce greenhouse gas emissions, and enhance mobility equity across communities in the United States. By offering residents the opportunity to borrow e-bikes for periods ranging from a couple of hours to several months, these programs help address barri ...
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