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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 5161 - 5180 of 36958 results
  • Development of MASH Computer Simulated Steel Bridge Rail and Transition Details
    Development of MASH Computer Simulated Steel Bridge Rail and Transition Details
    Plaxico, Chuck A. ;
    Ray, Ethan M
    2020-04-28 | PDF
    The predominate bridge rail and approach guardrail transition (AGT) systems used among the New England states include details for 2-bar, 3-bar and 4-bar designs which were developed and tested under previous crash test standards (i.e., AASHTO GSBR PL2 and NCHRP Report 350). These basic designs are currently being implemented among various participa ...
  • Development of MASH Computer Simulated Steel Bridge Rail and Transition Details
    Development of MASH Computer Simulated Steel Bridge Rail and Transition Details
    Plaxico, Chuck A. ;
    Ray, Ethan M.
    2020-04-28 | PDF
    The predominate bridge rail and approach guardrail transition (AGT) systems used among the New England states include details for 2-bar, 3-bar and 4-bar designs which were developed and tested under previous crash test standards (i.e., AASHTO GSBR PL2 and NCHRP Report 350). These basic designs are currently being implemented among various participa ...
  • Spatio‐Temporal Analysis of Freight Patterns in Southern California [supporting datasets]
    Jaller, Miguel ;
    Rivera, Daniel
    2020-04-24 | PDF
    There has been general trend to shift the location of warehouses and distribution facilities away from consumer markets (logistics sprawl) in Southern California. This shift has a negative impact on cost and the environment because freight vehicles have to travel longer to reach their destinations. However, during the last decade, this trend has no ...
    Dataset Supporting Files
  • Understanding and Guiding Pedestrian and Crowd Motion
    Understanding and Guiding Pedestrian and Crowd Motion
    Yang, Dongfang ;
    Redmill, Keith
    2020-04-24 | PDF
    Future transportation system is expected to be in a hybrid form instead of the basic road-vehicle-passenger relationship that is still very common in most transportation systems. That is to say, future transportation will cover additional scenarios and different types of vehicles with partial or full automation. A very representative example is the ...
  • Utilizing Highway Rest Areas for Electric Vehicle Charging: Economics and Impacts on Renewable Energy Penetration in California [supporting datasets]
    Kiani, Behdad ;
    Ogden, Joan
    2020-04-20 | PDF
    California policy is incentivizing rapid adoption of zero emission electric vehicles for light duty and freight applications. In this project, we explored how locating charging facilities at California’s highway rest stops, might impact electricity demand, grid operation, and integration of renewables like solar and wind into California’s energy mi ...
    Dataset Supporting Files
  • Examining the Traffic Safety Effects of Urban Rail Transit A Review of the National Transit Database and a BeforeAfter Analysis of the Orlando SunRail and Charlotte Lynx Systems
    Examining the Traffic Safety Effects of Urban Rail Transit: A Review of the National Transit Database and a Before-After Analysis of the Orlando SunRail and Charlotte Lynx Systems
    Dumbaugh, Eric ;
    Saha, Dibakar
    2020-04-15 | PDF
    Studies of rail transit safety typically focus on collisions involving rail vehicles and other road users. Nonetheless, the introduction of new rail transit into a metropolitan area may result in changes to the design and use of streets and intersections that influence the safety of other road users. This study conducts a before-after analysis of t ...
  • Blockchain for Unmanned Aircraft Systems
    Blockchain for Unmanned Aircraft Systems
    McGovern, Seamus
    2020-04-15 | PDF
    This white paper provides a high-level study of unmanned aircraft systems' flight operations that may benefit from the application of blockchain concepts.
  • Correlation Analysis of MDSS and NEWINS
    Correlation Analysis of MDSS and NEWINS
    Anderson, Mark R. ;
    Walker, Curtis L.
    2020-04-15 | PDF
    Improving winter maintenance is a goal of most transportation agencies including the Nebraska Department of Transportation (NDOT). One approach is to develop a decision support system to aid in the winter maintenance recommendations. Iteris has developed a maintenance decision support system (MDSS) and has teamed up with NDOT to provide winter weat ...
  • Changing Access to Public Transportation and the Potential for Increased Travel [supporting datasets]
    McDonald, Noreen ;
    Wolfe, Mary K.
    2020-04-13 | PDF
    With nationwide declines in public transportation ridership, transit may be falling behind in its ability to help cities deal with congestion. Increasing real-estate values are causing the economic displacement of low-income populations, those most closely associated with transit ridership. A plethora of new mobility options are providing alternati ...
    Dataset Supporting Files
  • Evaluation of Work Zone Mobility by Utilizing Naturalistic Driving Study Data [supporting dataset]
    Zhou, Huaguo Hugo ;
    Turochy, Rod E
    2020-04-10 | PDF
    STRIDE Project ID: STRIDE B2. Project Title: Evaluation of Work Zone Mobility by Utilizing Naturalistic Driving Study Data. Project Grant Period: August 16, 2018 – August 15, 2019The original SHRP 2 data that was utilized in this study cannot be uploaded to the repository The SHRP 2 data is only available through a Data Use License, and can only be ...
    Dataset Supporting Files
  • Measuring Transportation Network Performance During Emergency Evacuations A Case Study of Hurricane Irma and Woolsey Fire
    Measuring Transportation Network Performance During Emergency Evacuations: A Case Study of Hurricane Irma and Woolsey Fire
    Menon, Nikhil ;
    Staes, Brian
    2020-04-09 | PDF
    The United States has witnessed several natural disasters in recent memory. Natural disasters such as hurricanes, wildfires, and floods not only cause extensive monetary damages but also lead to spatiotemporal displacement of affected residents. Often, in these scenarios, governments at various levels – state/regional/local – grapple with how to ef ...
  • Safety Concerns Associated with Micromobility Products
    Safety Concerns Associated with Micromobility Products
    Consumer Product Safety Commission. Office of Hazard Identification and Reduction
    2020-04-08 | PDF
    Use of micromobility products, including electric scooters, electric bicycles, and self-balancing scooters, has increased in recent years with advancements in battery technology and the advent of commercial ride-sharing services. Consumer Product Safety Commission (CPSC) staff have identified potential mechanical, electrical, and human factors haza ...
  • Freeway Management for Optimal Reliability [supporting datasets]
    Laval, Jorge ;
    Xu, Tu
    2020-04-06 | PDF
    This data supports the findings from a multi-institutional effort for analyzing and improving freeway travel time reliability. The final report, " Freeway Management for Optimal Reliability" is linked in this repository.The Data zip file contains outputs from GTsim software and a R script to analyze the outputs.
    Dataset Supporting Files
  • Accelerated Bridge Preservation Technologies
    Accelerated Bridge Preservation Technologies
    Corley-Lay, Judith ;
    Gates, Timothy J.
    2020-04-02 | PDF
    This project used results of a national survey to collect life expectancies of bridge activities and the durations of construction to do those activities. The national survey also showed the current use of contractors, in-house staff and combinations to execute those activities. In addition, the national survey provided input from 11 agencies on pr ...
  • Incorporating Reliability Measures Into the Freight Project Prioritization Decision Support System
    Incorporating Reliability Measures Into the Freight Project Prioritization Decision Support System
    Lee, Ming ;
    Jin, Xia
    2020-04-01 | PDF
    In this report, the detailed processes and methodologies required for implementation of the evaluation framework for the proposed Freight Project Prioritization Decision Support System are discussed. Research reports and guidelines at the federal level are referenced for the development of the methodologies. The evaluation framework produced a stan ...
  • Field Monitoring of Erosion and Sediment Control Practices and Development of Additional Iowa Dot Design Manual Guidance
    Field Monitoring of Erosion and Sediment Control Practices and Development of Additional Iowa Dot Design Manual Guidance
    Schussler, Jaime ;
    Perez, Michael A
    2020-04-01 | PDF
    The National Pollutant Discharge Elimination System General Permit No. 2 requires the Iowa Department of Transportation (DOT) to develop a stormwater pollution prevention plan for all construction activities that are covered by the permit. The Stormwater Pollution Prevention Plan includes the design, installation, and maintenance of erosion and sed ...
  • Application of Internal Curing to Improve Concrete Bridge Deck Performance
    Application of Internal Curing to Improve Concrete Bridge Deck Performance
    Abdigaliyev, Arman ;
    Kim, Yong-Rak
    2020-04-01 | PDF
    Due to the relatively high cement content and low water-to-cement ratio (w/c) used, bridge deck concrete is prone to premature cracking. Internal curing has been found to greatly reduce the chance of premature cracking as well as concrete deterioration. This research project was intended to develop internally cured bridge deck concrete based on a l ...
  • Quality Control and Quality Assurance of Asphalt Mixtures Using Laboratory Rutting and Cracking Tests
    Quality Control and Quality Assurance of Asphalt Mixtures Using Laboratory Rutting and Cracking Tests
    Lee, Jusang ;
    Haddock, John E.
    2020-04-01 | PDF
    The main objectives of this project were to review the available balanced-mix design (BMD) methodologies, understand the I-FIT and Hamburg Wheel Tracking Test (HWTT) test methods using INDOT asphalt mixtures, and to explore the application of these tests to both a BMD approach and as performance-related Quality Control (QC) and Quality Acceptance ( ...
  • Accelerated Repair and Replacement of Expansion Joints
    Accelerated Repair and Replacement of Expansion Joints
    Phares, Brent M. ;
    Ruble, Kara
    2020-04-01 | PDF
    Bridge deck expansion joints allow for the movement of bridge decks exposed to thermal expansion and dynamic loading. These joints are often one of the first components of a bridge deck to fail, and there is a need for accelerated replacement options, especially in areas with high traffic volumes. Extensive research is being conducted on accelerate ...
  • Exploring the Role of Attitude in the Acceptance of SelfDriving Shuttles
    Exploring the Role of Attitude in the Acceptance of Self-Driving Shuttles
    Xing, Yan ;
    Handy, Susan L
    2020-04-01 | PDF
    Self-driving vehicles, as a revolution in mobility, are emerging and developing rapidly. However, public attitudes toward this new unproven technology are still uncertain. Given the significant influence of attitude toward a new technology on the intention to use it, the question arises as to why some people are in favor of this technology whereas ...
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