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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 2601 - 2620 of 36873 results
  • Geoarchaeological Survey Methods for Enhanced DecisionMaking in the Ohio Department of Transportations Project Development Process Fact Sheet
    Geoarchaeological Survey Methods for Enhanced Decision-Making in the Ohio Department of Transportation’s Project Development Process [Fact Sheet]
    Dam, Seth Van ;
    Laswell, Jeff
    2023-02-01 | PDF
    The objective of this geophysical technical research was to aid the Ohio Department of Transportation’s (ODOT) Office of Environmental Services (OES) to provide a baseline understanding of geophysical techniques and their applications to various types of archaeological investigative situations, and to provide recommendations for the implementation ...
  • Development of Environmental Product Declarations EPDs for Sustainable Pavement Procurement
    Development of Environmental Product Declarations (EPDs) for Sustainable Pavement Procurement
    Senseney, Christopher T
    2023-02-01 | PDF
    The Colorado Department of Transportation (CDOT) funded this project to assess the current state-of-the-practice of EPDs in pavement material manufacturing; to educate stakeholders regarding pavement life cycle assessment (LCA) and EPDs; and to help develop protocols CDOT and pavement material producers can use to integrate EPDs that are uniquely s ...
  • 2023 Progress Report on the National Roadway Safety Strategy
    2023 Progress Report on the National Roadway Safety Strategy
    United States. Department of Transportation. Office of the Secretary of Transportation
    2023-02-01 | PDF
    This report provided an update on the roadway safety problem, an overview of the Departmental actions underway to address the ongoing crisis on our roadways, a description of new priority actions that will build on the NRSS, and an explanation of how USDOT is working with stakeholders to further advance safety to save lives and prevent harm to all ...
  • Fiber Reinforced Concrete for Bridge Deck Overlays
    Fiber Reinforced Concrete for Bridge Deck Overlays
    Amini, Kamran ;
    Vaddey, Pavan
    2023-02-01 | PDF
    This report reviews available research literature and reports on Fiber Reinforced Concrete (FRC) mixtures to recognize best practices of using FRC overlay mixtures and identify products with the potential of being successfully utilized in Missouri. State DOT representatives were surveyed to consolidate the current state of practice as it relates to ...
  • Field Evaluation of Geophysical Applications for DOTD Project Capsule
    Field Evaluation of Geophysical Applications for DOTD [Project Capsule]
    Ferguson, Nicholas
    2023-02-01 | PDF
    This research will evaluate the effectiveness of the Electrical Resistivity, Seismic Refraction, and Cross-hole Tomography geophysical methods in Louisiana soils and provide detailed descriptions of each method, including their applicability to geotechnical engineering, pros and cons, and cost of each method and required equipment. This research wi ...
  • School Zone Speed Limits SZLSs Transportation Research Synthesis
    School Zone Speed Limits (SZLSs) Transportation Research Synthesis
    Moore-Ritchie, Chelsea ;
    Kienitz, Heather
    2023-02-01 | PDF
    Minnesota statute provides for a wide range of school zone speed limits (SZSLs) from which local authorities may select. This Transportation Research Synthesis summarizes the current research regarding setting SZSLs, effective methods and procedures for setting school zone speed limits and known spillover or other unintended consequences for settin ...
  • Best Types of Commodity Flow Data for Freight Railroad and Ports and Waterways Studies
    Best Types of Commodity Flow Data for Freight, Railroad, and Ports and Waterways Studies
    Fonseca, Camila ;
    Zeerak, Raihana
    2023-02-01 | PDF
    The understanding of freight movement is critical to economic development and competitiveness and to make decisions regarding the transportation system. Despite the increased interest in freight planning and modeling, freight data are limited in availability and granularity, and the existing sources are incomplete or outdated. This research analyze ...
  • Automated Extraction of Weather Variables from Imagery
    Automated Extraction of Weather Variables from Imagery
    Wiener, Gerry ;
    Petzke, William
    2023-02-01 | PDF
    Department of transportation (DOT) maintenance supervisors utilize a variety of tools including maintenance decision support systems (MDSS) to gain a better understanding of current and future road surface conditions (RSC) during winter weather. MDSS automatically attempt to deduce current RSC based on road weather information system (RWIS) and oth ...
  • UserCentered Design for Railroad Automation Phase I
    User-Centered Design for Railroad Automation: Phase I
    Cowen, Michael B. ;
    Haaren, Michael H.
    2023-02-01 | PDF
    This document is the final report for Phase I of a two-phase research project, “User-Centered Design for Railroad Automation (UCD-Rail),” to develop and demonstrate an improved interface between human operators and advanced automation in rail systems. Applying user-centered design methodology, Phase I offers a new rail systems user interface concep ...
  • Developing a Culvert Inspection Manual and Estimating Culverts Deterioration Curve Inspection Frequency and Service Life for UDOT
    Developing a Culvert Inspection Manual and Estimating Culverts' Deterioration Curve, Inspection Frequency and Service Life for UDOT
    Mohammadi, Pouria ;
    Sherafat, Behnam
    2023-02-01 | PDF
    Culverts are among the most important assets of state transportation departments. As culvert inspection and maintenance are critical to the safe operation of transportation infrastructure systems and preventing injuries, human life losses, and heavy financial losses, they should be inspected and maintained regularly. Several state DOTs and the Amer ...
  • Load Rating of GirderStringerFloorbeam Bridges
    Load Rating of Girder-Stringer-Floorbeam Bridges
    Henderson, R Craig ;
    Huff, Tim
    2023-01-31 | PDF
    The research described herein investigated the behavior and capacity of girder-string-floorbeam bridges by: • Conducting a literature review of the current state-of-practice and emerging research regarding the capacity and behavior of girder-stringer-floorbeam bridges; • Experimentally measuring strain at various locations and identifying character ...
  • Workforce Development Initiative WisDOT Workforce Skills and Knowledge Management Project
    Workforce Development Initiative – WisDOT: Workforce Skills and Knowledge Management Project
    Singh, Romila ;
    Qin, Xiao
    2023-01-31 | PDF
    The purpose of this project was to understand and analyze the nature of gaps in skills needed for job performance and the current status of knowledge management (KM) practices across WisDOT and offer recommendations on how best to address some of the gaps using insights derived from a review of best practices and analysis of survey data. The projec ...
  • Evaluating the Performance and Safety Effectiveness of Roundabouts An Update
    Evaluating the Performance and Safety Effectiveness of Roundabouts – An Update
    Savolainen, Peter T. ;
    Gates, Timothy J.
    2023-01-30 | PDF
    The objective of this research was to evaluate driver behavior, safety benefits, operational and environmental benefits of roundabouts in Michigan. To that end, a list of all 180 known roundabouts was compiled from various sources. For comparison purposes, a group of reference intersections was also compiled that had similar traffic volume, roadway ...
  • Protocol for Outlet Analysis at Highway Sites
    Protocol for Outlet Analysis at Highway Sites
    Hunt, William F ;
    Waickowski, Sarah
    2023-01-16 | PDF
    Stormwater conveyance networks contribute to stream degradation and instability either through direct discharges of sediment or by eroding gullies downslope of pipe outlets. To limit erosion downslope of pipe outlets, current regulations require the 10-yr, 24-hr peak velocity discharged to a vegetated area to be less than the downslope soils’ permi ...
    Supporting Files
  • Subjective vs Objective The Divergence between Subjective Walkability
    Subjective vs. Objective: The Divergence between Subjective Walkability
    Lewis, Rebecca ;
    Yang, Yizhao
    2023-01-09 | PDF
    Increasing the usage of sustainable travel modes requires changes in both environmental and psychological dimensions. A knowledge gap exists concerning the mechanism via which various factors interact to shape travel decision. Gaining such knowledge requires our ability to examine people’s behavioral adjustment in reaction to environmental and psyc ...
  • Annulus Void Fill Material for Rehabilitated Sliplined Culverts Fact Sheet
    Annulus Void Fill Material for Rehabilitated Sliplined Culverts [Fact Sheet]
    Patnaik, Anil ;
    Alzlfawi, Abdullah
    2023-01-08 | PDF
    The ODOT Office of Hydraulic Engineering initiated this research project to investigate the reasons for incomplete filling of the annulus voids and to develop a solution to address the problem.
  • Beneficial Reuse of Reclaimed Asphalt Pavement in Geotechnical Infrastructure
    Beneficial Reuse of Reclaimed Asphalt Pavement in Geotechnical Infrastructure
    Hubler, Jonathan ;
    Sample-Lord, Kristin
    2023-01-03 | PDF
    Reclaimed Asphalt Pavement (RAP) has been extensively studied for potential use as a recycled material in infrastructure construction. There is consensus that utilization of RAP provides environmental and economic benefits for most projects. However, impacts to engineering performance are less known, due to the highly variable nature of RAP sources ...
  • Political Preferences and Transport Infrastructure Evidence from Californias HighSpeed Rail
    Political Preferences and Transport Infrastructure: Evidence from California’s High-Speed Rail
    Fajgelbaum, Pablo D. ;
    Gaubert, Cecile
    2023-01-01 | PDF
    We study how political preferences shaped California’s High-Speed Rail (CHSR), a large transportation project approved by referendum in 2008. Voters’ support responded significantly to the projected economic gains in their tract of residence, as measured by a quantitative model of high-speed rail matched to CHSR plans. Given this response, a reveal ...
  • Assessing Sustainability of ECommerce Goods Distribution
    Assessing Sustainability of E-Commerce Goods Distribution
    Pahwa, Anmol
    ORCID ICON IMG
    2023-01-01 | PDF
    The growth of e-commerce, spurred by the internet, has transformed urban goods flow. What would previously have been a trip to a store is now a hassle-free delivery to the home. With consolidated and optimized delivery tours, e-commerce has the potential to make urban goods flow economically viable, environmentally efficient, and socially equitable ...
  • 21 Roadway Design Guidance Update
    2+1 Roadway Design Guidance Update
    Jasper, Jeff ;
    Wolfe, Jeff
    2023-01-01 | PDF
    The frequency and severity of crashes on rural two-lane roadways have increased in the US relative to other road types. This trend can be explained by the growing number of vehicles, higher speeds, narrow shoulders, and vehicle mixes. One solution for improving traffic flow and safety outcomes on rural two-lane roadways is to adopt a 2+1 design, wh ...
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