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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 2421 - 2440 of 36873 results
  • Develop Guidance for Structural Behavior of Tall Haunches in TxDOT Beam and Girder Bridges Project Summary
    Develop Guidance for Structural Behavior of Tall Haunches in TxDOT Beam and Girder Bridges [Project Summary]
    Helwig, Todd A ;
    Khare, Nidhi
    2023-05-01 | PDF
    This study aimed to investigate the behavior of steel and concrete girder bridges with tall haunches and develop corresponding design guidelines. The research involved conducting push-out tests to assess the capacity and limit states that arise in the composite connection between bridge girders and concrete decks with tall haunches.
  • Feasibility Study Application of Steel SheetPiles for the Abutment of WaterCrossing Bridges in Nebraska
    Feasibility Study: Application of Steel Sheet-Piles for the Abutment of Water-Crossing Bridges in Nebraska
    Kim, Seunghee ;
    Eun, Jongwan
    2023-05-01 | PDF
    The overall goal of this study is to investigate the anticipated performance of steel sheet-pile bridge abutments to encourage its wider application to not only new construction but also repair and replacement of existing water-crossing bridges in Nebraska. For this purpose, this study first reviewed several bridge cases with axially loaded sheet p ...
  • Domestic Airline Fares Consumer Report Fourth Quarter 2022 Passenger and Fare Information
    Domestic Airline Fares Consumer Report: Fourth Quarter 2022 Passenger and Fare Information
    United States. Department of Transportation
    2023-05-01 | Domestic Airline Fares Consumer Report | PDF
    Each month the Department of Transportation releases an Air Travel Consumer Report that includes information about various service quality elements, including flight delays, mishandled baggage, over sales, and a variety of other types of consumer complaints. In response to an increasing number of inquiries from consumers about domestic airline pric ...
  • GISBased Geotechnical Database for Collaborative GIS
    GIS-Based Geotechnical Database for Collaborative GIS
    Raja, Rameez Ali ;
    Toshniwal, Vidushi
    2023-05-01 | PDF
    INDOT spends at least 8 million dollars annually on geotechnical site investigations, not including the amounts spent by contractors. The laborious and costly job of data collection in geotechnical practice requires the efficient storing and organizing of this valuable data to develop correlations and trends in spatially varying geotechnical data. ...
  • Turfgrass Seed Variety Evaluation Process
    Turfgrass Seed Variety Evaluation Process
    Watkins, Eric ;
    Yue, Chengyan
    2023-05-01 | PDF
    This project addresses two critical needs: to update existing Minnesota Department of Transportation (MnDOT) turfgrass recommendation lists and to develop a new process to keep lists continually updated in a fair manner with data-driven recommendations. The authors evaluated the current list of MnDOT-approved turfgrass varieties and found underperf ...
  • Comparison of the Performance of Fiber Reinforced Plastic Dowel Bars to EpoxyCoated and StainlessSteel Dowel Bars
    Comparison of the Performance of Fiber Reinforced Plastic Dowel Bars to Epoxy-Coated and Stainless-Steel Dowel Bars
    Ziemann, Sarah ;
    Christiansen, Annika
    2023-05-01 | PDF
    The introduction of fiber reinforced plastic (FRP) dowels as possible alternatives to the epoxy-coated and stainless-steel dowels, was contemporaneous with a paucity of knowledge of their long-term performance. Although various isolated efforts had examined them on a short-term basis and produced some qualitative results or long-term predictive mod ...
  • Traffic Safety Facts 2021 Data Occupant Protection in Passenger Vehicles
    Traffic Safety Facts 2021 Data: Occupant Protection in Passenger Vehicles
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2023-05-01 | PDF
    Occupant protection discussed in this fact sheet includes seat belts, car seats for children under 5 years old, and frontal air bags in passenger vehicles. Passenger vehicles consist of passenger cars and light trucks (pickups, SUVs, and vans) with gross vehicle weight ratings (GVWRs) of 10,000 pounds or less. Vehicle occupants include drivers and ...
  • Traffic Safety Facts 2021 Research Note Distracted Driving in 2021
    Traffic Safety Facts 2021 Research Note: Distracted Driving in 2021
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2023-05-01 | PDF
    The National Highway Traffic Safety Administration works to reduce the occurrence of distracted driving and raise awareness of its dangers. This risky driving behavior poses a danger not only to vehicle occupants but pedestrians and pedalcyclists as well. Driver distraction is a specific type of driver inattention that occurs when drivers divert at ...
  • Traffic Safety Facts 2021 Data Children
    Traffic Safety Facts 2021 Data: Children
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2023-05-01 | PDF
    This fact sheet contains information on fatal motor vehicle traffic crashes based on data from the Fatality Analysis Reporting System (FARS) and non-fatal motor vehicle traffic crashes from the Crash Report Sampling System (CRSS). A change instituted with the release of 2020 data is rounding estimates to the nearest whole number instead of the near ...
  • 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 ...
  • 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.
  • 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 ...
  • 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. ...
  • Methods for Sealing Vertical Cracks on Concrete Structures
    Methods for Sealing Vertical Cracks on Concrete Structures
    Sufian, Abu Ahmed ;
    Lee, Hyung S
    2023-04-01 | PDF
    The Florida Department of Transportation (FDOT) has had inconsistent success in sealing vertical cracks in concrete structures. This necessitated the investigation of the performance of different sealant types and application methods to address the concern of proper crack sealing in concrete substructures that cannot be routinely investigated. For ...
  • 2022 GDOT Employee Survey
    2022 GDOT Employee Survey
    DeMeester, Karen ;
    Simmons, Brian
    2023-04-01 | PDF
    The research team which included faculty from University of Georgia’s College of Engineering and Carl Vinson Institute of Government worked in collaboration with the Georgia Department of Transportation (GDOT) to conduct the 2022 GDOT employee survey. This research study aimed to increase the response rate and the usefulness of the feedback from th ...
  • Shear and Bearing Capacity of Corroded Steel Beam Bridges and the Effects on Load Rating
    Shear and Bearing Capacity of Corroded Steel Beam Bridges and the Effects on Load Rating
    Kanakamedala, Deven ;
    Seo, Jungil
    2023-04-01 | PDF
    Corrosion in the girders of steel girder bridges often occurs due to the deicing salts, water, and other debris that leak through the deck joints into the web and bottom flange at the girder ends. Corrosion causes loss of cross-sectional area leading to a reduction in section properties of the member, which eventually results in a reduction in stru ...
  • Implementation of Balanced Asphalt Mix Design of Asphalt Mixtures Prepared with Reclaimed Asphalt Pavements and Rejuvenators for Enhanced Performance
    Implementation of Balanced Asphalt Mix Design of Asphalt Mixtures Prepared with Reclaimed Asphalt Pavements and Rejuvenators for Enhanced Performance
    Kassem, Emad ;
    Hatailah, Hussain Al
    2023-04-01 | PDF
    The use of Reclaimed Asphalt Pavement (RAP) promotes and integrates sustainable solutions into civil engineering practices. Many transportation agencies limit the RAP content to a small percentage. Despite the environmental benefits and cost savings of incorporating RAP into asphalt mixtures, it may result in stiffer mixtures, especially at a highe ...
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