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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 2041 - 2060 of 36114 results
  • Cost Estimate of B vs C Grade Asphalt Binders
    Cost Estimate of B vs. C Grade Asphalt Binders
    Yan, Tianhao ;
    Marasteanu, Mihai
    2023-05-01 | PDF
    Polymer-modified binders (PMB) have been shown over the decades to improve the mechanical properties of asphalt mixtures compared to unmodified binders. Considering the higher initial cost of PMB, selecting the best alternative is very important, especially for local agencies given their limited budgets. A challenge in the materials selection proce ...
  • District Highway Maintenance Research OnCall Task 2 Evaluation of New Technologies for Tracking the Distribution of Deicing Materials Fact Sheet
    District Highway Maintenance Research On-Call Task 2: Evaluation of New Technologies for Tracking the Distribution of Deicing Materials [Fact Sheet]
    Lammers-Staats, Erin ;
    Raudenbush, Zane
    2023-05-01 | PDF
    This Research-On-Call task provides ODOT a framework with which to evaluate the available new technologies for tracking the distribution of deicing materials. To accomplish this, researchers analyzed the current state of the practice for ODOT storm management, surveyed other transportation agencies about their winter maintenance programs, identifie ...
  • 07039 The Development of Knowledge in the Application of StrutandTie Method Summary
    0-7039: The Development of Knowledge in the Application of Strut-and-Tie Method [Summary]
    Dassi, Martin ;
    Bayrak, Oguzhan
    2023-05-01 | PDF
    The strut-and-tie method (STM) is a simple and widely used method for designing D-regions in reinforced concrete members. Despite its incorporation into major design codes and continuous refinement over the past century, there are still areas that require further research. These include the use of 3D strut- and-tie models for designing drill shaft ...
  • 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 | National Transportation Statistics (NTS) | 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 ...
  • District Highway Maintenance Research OnCall Task 2 Evaluation of New Technologies for Tracking the Distribution of Deicing Materials
    District Highway Maintenance Research On-Call Task 2: Evaluation of New Technologies for Tracking the Distribution of Deicing Materials
    Lammers-Staats, Erin ;
    Raudenbush, Zane
    2023-05-01 | PDF
    This report summarizes the results of a research task that was conducted to analyze Ohio DOT’s use of liquid deicing materials and the tracking capabilities of its snowplows’ distribution systems. The objective of the task was to identify areas for improvement in terms of tracking the liquid application rates and provide ideas on how to evaluate ne ...
  • 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 ...
  • Influence of Autonomous and Partially Autonomous Vehicles on Minnesota Roads
    Influence of Autonomous and Partially Autonomous Vehicles on Minnesota Roads
    Espindola, Andre ;
    Alexander, Lee
    2023-05-01 | PDF
    This project focuses on experimental tests of the performance characteristics of autonomous vehicles (AVs) on highways and local roads in Minnesota. The project provides detailed data characterizing AV performance, which in turn can be used to inform the transportation community on implications for infrastructure maintenance, winter road maintenanc ...
  • 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 | National Transportation Statistics (NTS) | 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 ...
  • 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 ...
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