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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 1941 - 1960 of 35865 results
  • Pedestrian Traffic Signal Violations Safety Design and Operational Implications
    Pedestrian Traffic Signal Violations: Safety, Design, and Operational Implications
    Singleton, Patrick A. ;
    Mekker, Michelle
    2023-05-01 | PDF
    The objective of this research project is to improve pedestrian safety at signalized intersections by focusing on pedestrian signal violations: measuring behaviors, associating characteristics and locations, and identifying potential mitigation strategies. In this project, we recorded videos and collected and analyzed observational data on pedestri ...
  • Optimized HotMix Asphalt Lift Configuration for Performance
    Optimized Hot-Mix Asphalt Lift Configuration for Performance
    Al-Qadi, Imad L ;
    Ramakrishnan, Aravind
    2023-05-01 | PDF
    Researchers conducted eight large-scale laboratory tests to assess the combined impact of hot-mix asphalt (HMA) overlay mix and thickness on its performance to control reflective cracking. Bonding efficiency, flexibility, and stiffness of the HMA mix as well as overlay thickness significantly affect an overlay’s performance against reflective crack ...
  • Evaluation of RightofWay Fence Tags to Reduce AnimalVehicle Collisions
    Evaluation of Right-of-Way Fence Tags to Reduce Animal-Vehicle Collisions
    Gagnon, Jeffrey W. ;
    Beach, Colin A.
    2023-05-01 | PDF
    Animal-vehicle collisions (AVC) pose a serious and growing threat to motorists traveling on ADOT roads. Solutions exist to effectively mitigate AVC, such as wildlife crossing structures (overpasses and underpasses), however these solutions can be costly and untimely. Fence tags, a small reflective tag that is attached to the right-of-way fence and ...
  • Towards the Implementation of a Geotechnical Asset Management Program in the State of Georgia
    Towards the Implementation of a Geotechnical Asset Management Program in the State of Georgia
    Macedo, Jorge ;
    Burns, Susan E.
    2023-05-01 | PDF
    Experiences at U.S. departments of transportation (DOTs) have demonstrated the value of geotechnical asset management (GAM) to enable a framework for informed decisions that align the DOT’s objectives with investment and performance targets. However, because Georgia currently lacks a such a program, this study was performed to set the stage for dev ...
  • Evaluating Metrics and Performance to Advance Transportation Equity
    Evaluating Metrics and Performance to Advance Transportation Equity
    Elgart, Zachary
    ORCID ICON IMG
    2023-05-01 | PDF
    MnDOT operates under an Equity Lens Framework, which, in addition to supporting the core agency values of accountability as well as diversity and inclusion, emphasizes underrepresented groups to achieve equitable outcomes. Measures and methods to evaluate transportation program equity impacts, however, have generally been lacking. To assess both sy ...
  • Traffic Safety Toolbox Addressing Speeds
    Traffic Safety Toolbox – Addressing Speeds
    Sullivan, James L. ;
    Rowangould, Dana
    2023-05-01 | PDF
    Reducing speeding and aggressive driving is one of seven critical emphasis areas identified in the Vermont Highway Safety Plan, which targets reductions in major crashes on Vermont highways. Vermont towns recognize the need to discourage speeding and implement countermeasures that will bring speeds down to posted speed limits, especially in transit ...
  • Impact of Permit Vehicles on Bridges and Pavements in Alabama
    Impact of Permit Vehicles on Bridges and Pavements in Alabama
    Chmielewski, Jacek ;
    Stawska, Sylwia
    2023-04-30 | PDF
    Permit regulations and heavy traffic monitoring procedures are developed to provide safety and protect the infrastructure from accelerated wear and tear. The number of issued permits is growing, but the impact of the overloaded vehicles has not been quantified. Alabama permit fee schedule has not been changed for decades; therefore, there is a need ...
  • Study of Impacts of Technology on the Future Workforce at the MDOT SHA Research Summary
    Study of Impacts of Technology on the Future Workforce at the MDOT SHA [Research Summary]
    Han, Chaodong
    ORCID ICON IMG
    2023-04-30 | PDF
    The scope of this study is to provide recommendations on how administrative assistants and business analyst jobs may be redesigned and aligned with technological changes and the job market dynamics and how employees, processes and technology may be managed to better meet MDOT SHA’s needs.
  • Right of Way Mapping Conversion to GIS
    Right of Way Mapping Conversion to GIS
    Bunting, Erin L ;
    Goodwin, Robert F
    2023-04-28 | PDF
    The goals of this project were to research the best method of utilizing information to update ROW maps, determine the best method to create a ROW map product that could integrate future Real Estate functions, determine what ROW map product would be best for moving towards a GIS and create a simplified map search functionality. To accomplish the pro ...
  • Evaluation of MDOTs LongLife Pilot Projects
    Evaluation of MDOT’s Long-Life Pilot Projects
    Muslim, Hamad Bin ;
    Ghazavi, Mahdi
    2023-04-19 | PDF
    In Michigan, four pilot long-life pavement sections were constructed between 2017 and 2019; two rigid and two flexible pavements. Each pilot project included a long-life and an accompanying standard (control) section constructed on the same highway. Modifications to standard designs and materials were made to extend their service life. The scope of ...
  • Construction Wind Loading for Steel Girders Resiliency and Reliability
    Construction Wind Loading for Steel Girders – Resiliency and Reliability
    Eshra, Elsayed ;
    Warn, Gordon
    2023-04-11 | PDF
    The main objective of this study is to assess and evaluate PennDOT’s current specifications for wind loading on completely erected steel girders with diaphragms installed but prior to the placement of the deck. Current specifications are evaluated with respect to recent changes to AASHTO’s wind loading procedures for bridges under construction base ...
  • Improved Maintenance Methods for Bridge Drains and Expansion Joints
    Improved Maintenance Methods for Bridge Drains and Expansion Joints
    White, Wilderich A. ;
    Lasky, Ty A.
    2023-04-05 | PDF
    Many bridges have drainage systems and expansion joints that are not typically found on mainline roadways. Standard mechanical sweepers are well-suited for mainline roadways and standard drains; however, these machines tend to push incompressible debris into bridge drains, which can easily lead to blocking of the drains and to subsequent flooding. ...
  • Enhancing Managed Lanes Equity Analysis
    Enhancing Managed Lanes Equity Analysis
    Douma, Frank ;
    Fonseca-Sarmiento, Camila
    2023-04-01 | PDF
    Planning and environmental studies involving managed lanes still have difficulty determining how to effectively evaluate project alternatives from an equity perspective. To most people, “equity” is ubiquitous with income, but this is a narrow focus that limits the scope of what can be considered equity, and indeed this can be true when it comes to ...
  • The Future of the Louisiana Waterways Transport System A System Analysis and Plan to Move Commerce by Water
    The Future of the Louisiana Waterways Transport System: A System Analysis and Plan to Move Commerce by Water
    Cruz, Ricardo ;
    Hird, Jonathan
    2023-04-01 | PDF
    Moving commerce by water represents 25 percent of all goods movements within the state of Louisiana and is a critical component of the multimodal transportation system in the state [1]. To be best positioned for future development and investment, the Louisiana Department of Transportation and Development's (DOTD) Office of Multimodal Commerce (OMC) ...
  • The Future of the Louisiana Waterways Transport System A System Analysis and Plan to Move Commerce by Water Tech Summary
    The Future of the Louisiana Waterways Transport System: A System Analysis and Plan to Move Commerce by Water [Tech Summary]
    Cruz, Ricardo ;
    Mitran, Elisabeta
    2023-04-01 | PDF
    To be able to develop this plan with a capability of providing a level of planning and forecasting guidance, it is necessary to identify the type and value of waterborne commerce, thereby providing the focus for the analysis and documentation of the impact and importance of waterborne commerce on the state of Louisiana, its transportation system, a ...
  • Bats Use of Bridges and Culverts
    Bats Use of Bridges and Culverts
    Wetzel, Theresa ;
    Roby, Piper
    2023-04-01 | PDF
    Bats are found on every continent except Antarctica and play a crucial role in our ecosystems from pollination to pest control to seed dispersal. Although bats use natural roosts such as trees and caves, many species also use anthropogenic roosts such as buildings and transportation structures. Because of this, a growing number of transportation de ...
  • Using Mycofiltration Treatment for Stormwater Management
    Using Mycofiltration Treatment for Stormwater Management
    Kennen, Kate ;
    Chadderton, Colin
    2023-04-01 | PDF
    Federal and State environmental regulations require transportation construction and retrofit projects to manage stormwater and improve water quality. MassDOT has legal, financial, and ecological obligations to mitigate pollution from stormwater runoff entering water bodies. Existing green and gray infrastructure in place across the Commonwealth is ...
  • LRFD Procedure for Piles with Pilot Hole in Rock
    LRFD Procedure for Piles with Pilot Hole in Rock
    Nam, Soonkie ;
    Yang, Xiaoming
    2023-04-01 | PDF
    A pile driven into the ground gets its bearing capacity from skin friction along the pile surface as well as from end resistance at the toe. The load transfer mechanism determines how much load is carried by the shaft and by the toe. In Georgia, when a hard/dense layer exists in the pile length or the vibration/noise during the driving causes secon ...
  • Field Demonstration of PostConsumer Waste Plastics and Ground Tire Rubber in Columbia Missouri
    Field Demonstration of Post-Consumer Waste Plastics and Ground Tire Rubber in Columbia, Missouri
    Buttlar, William G. ;
    Rath, Punyaslok
    2023-04-01 | PDF
    Research has shown that asphalt pavements can serve as a destination for some of the major streams of waste materials around the globe, such as scrap tires and plastics. Heightened restrictions imposed by China in terms of waste stream contamination in 2018has catalyzed research on incorporating post-consumer recycled (PCR) plastics into asphalt pa ...
  • Best Practices for Historic Masonry Repair and Rehabilitation
    Best Practices for Historic Masonry Repair and Rehabilitation
    Miller, Ann B.
    2023-04-01 | PDF
    The most recently published update of the Virginia Department of Transportation’s (VDOT’s) historic bridge management plan, A Management Plan for Historic Bridges in Virginia: The 2017 Update, noted a number of special considerations regarding stone masonry on VDOT’s historic bridges (i.e., those state-owned bridges that are individually eligible f ...
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