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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 2061 - 2080 of 36151 results
  • Guidance for Structural Behavior of Design and Detailing of Tall Haunches in Steel and Concrete Composite Girders
    Guidance for Structural Behavior of Design and Detailing of Tall Haunches in Steel and Concrete Composite Girders
    Khare, Nidhi ;
    Zhang, Zhenghao
    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. Additionally, t ...
  • Massachusetts Depth to Bedrock Project
    Massachusetts Depth to Bedrock Project
    Mabee, Stephen B ;
    Duncan, Christopher C
    2023-05-01 | PDF
    The depth to bedrock is perhaps one of the most important surfaces that is fundamental to many practical engineering and geological problems. Yet it is not well understood everywhere. Knowing the depth to bedrock for transportation projects not only influences cost but may also affect selection of the appropriate foundation system for a particular ...
  • Quality Control of Field Asphalt Mixtures and Compatibility of Aggregates and Emulsions using Asphalt Compatibility Tester
    Quality Control of Field Asphalt Mixtures and Compatibility of Aggregates and Emulsions using Asphalt Compatibility Tester
    Castorena, Cassie ;
    Yadav, Shivpal
    2023-05-01 | PDF
    The objectives of this project are to: (1) Establish a procedure to identify the optimum antistrip additive content for a given asphalt mixture and antistrip additive combination; (2) Evaluate the moisture damage resistance of plant-produced asphalt mixtures to establish a preliminary protocol for quality assurance and control; and (3) Develop an o ...
  • Annual North Dakota Elevator Marketing Report 20212022
    Annual North Dakota Elevator Marketing Report, 2021–2022
    Vachal, Kimberly ;
    Andersen, Jaclyn
    2023-05-01 | PDF
    The objective of this report is to provide a benchmark for elevator managers in assessing performance and supply a source for recognizing trends in the characteristics of North Dakota elevators. This report and the statistics mailed to individual elevators are presented as a source of information for elevator managers and those interested in the No ...
  • Design and Detailing of Anchorages for Externally Bonded CFRP Summary
    Design and Detailing of Anchorages for Externally Bonded CFRP [Summary]
    Suksawang, Nakin
    2023-05-01 | PDF
    For over 20 years, the Florida Department of Transportation (FDOT) has used externally bonded carbon fber-reinforced polymer (CFRP) to repair concrete bridges damaged by over-height vehicles, corrosion, or to increase shear capacity. Recently, there has been an increase in CFRP repairs to increase the shear capacity of concrete bridges.
  • 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 | National Transportation Statistics (NTS) | 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 ...
  • 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 ...
  • 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 ...
  • Study of Impacts of Technology on the Future Workforce at the MDOT SHA
    Study of Impacts of Technology on the Future Workforce at the MDOT SHA
    Han, Chaodong ;
    Otto, James
    2023-04-01 | PDF
    Artificial intelligence, robotic process automation, natural language processing and virtual collaboration technologies are transforming the landscape of the office and administrative workforce by automating non-value added, repetitive tasks and processes, as well as supporting remote and flexible work. The scope of this study is to provide recomme ...
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