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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 2241 - 2260 of 36114 results
  • 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 ...
  • Approaches for Assessing Flows Concentrations and Loads of Highway and Urban Runoff and ReceivingStream Stormwater in Southern New England With the Stochastic Empirical Loading and Dilution Model SELDM
    Approaches for Assessing Flows, Concentrations, and Loads of Highway and Urban Runoff and Receiving-Stream Stormwater in Southern New England With the Stochastic Empirical Loading and Dilution Model (SELDM)
    Granato, Gregory E. ;
    Spaetzel, Alana B
    2023-01-01 | PDF
    The Stochastic Empirical Loading and Dilution Model (SELDM) was designed to help quantify the risk of adverse effects of runoff on receiving waters, the potential need for mitigation measures, and the potential effectiveness of such management measures for reducing these risks. SELDM is calibrated using representative hydrological and water-quality ...
  • Considering FareFree Transit in the Context of Research on Transit Service and Pricing A Research Synthesis
    Considering Fare-Free Transit in the Context of Research on Transit Service and Pricing: A Research Synthesis
    King, Hannah ;
    Taylor, Brian D.
    2023-01-01 | PDF
    In this report, we examine both the substantial research literature on transit pricing and use and literature on free- and reduced fare (FAR) programs. In general, we find that FAR programs can take many forms, and the idea of “fare-free” transit is far from a one-size-fits-all proposition. Second, while reducing or eliminating fares does indeed in ...
  • Developing Customized NRCS Unit Hydrographs Finley UHs for Ungauged Watersheds in Indiana
    Developing Customized NRCS Unit Hydrographs (Finley UHs) for Ungauged Watersheds in Indiana
    Huang, Tao ;
    Merwade, Venkatesh
    2023-01-01 | PDF
    The Natural Resources Conservation Service (NRCS, formerly the Soil Conservation Service, SCS) unit hydrograph (UH) is one of the most commonly used synthetic UH methods for hydrologic modeling and engineering design all over the world. However, previous studies have shown that the application of the NRCS UH method for some ungauged watersheds in t ...
  • The Policy and Politics of Highway Expansions
    The Policy and Politics of Highway Expansions
    Lee, Amy Elisabeth
    2023-01-01 | PDF
    This mixed-methods dissertation explores questions related to the governance landscape and the institutional and political factors that surround highway expansion projects. Highways and highway building are a central contributor to a myriad of environmental and social problems, ranging from local air pollution to global climate change to displaceme ...
  • Safe and CostEffective Reduction of Load Postings for South Carolina Bridges
    Safe and Cost-Effective Reduction of Load Postings for South Carolina Bridges
    Ziehl, Paul ;
    Cousins, Tommy
    2023-01-01 | PDF
    South Carolina has over 9,000 bridges in its inventory, many of which were designed for H10 or H15 truck loads. Precast reinforced concrete flat slabs are the primary bridge type addressed. These components were chosen in consultation with SCDOT due to their prevalence in the bridge inventory and resolving associated performance issues will therefo ...
  • SCDOT Scope of Services Template Research
    SCDOT Scope of Services Template Research
    Bausman, Dennis ;
    Mousavi, Ehsan
    2023-01-01 | PDF
    In the United States, federal, state, and local governments are responsible for addressing their residents' transportation infrastructure needs. Similar to most State Departments of Transportation (State DOTs), the South Carolina Department of Transportation (SCDOT) is responsible for owning, operating, and maintaining a large transportation system ...
  • Synthesis Study on Employing Snowplow Driving Simulators in Training
    Synthesis Study on Employing Snowplow Driving Simulators in Training
    Debs, Luciana ;
    Zheng, Yanchao
    2023-01-01 | PDF
    Departments of Transportation (DOTs) need to mobilize workers under harsh weather conditions for winter operations. Traditional snowplow driver training at INDOT is usually conducted annually before the snow season; therefore, it does not replicate the conditions which drivers will be exposed to during winter operations. To this point, some state D ...
  • Pavement Marking Decision Tree Project Level For a New Surface or Replacing Existing Markings with a Different Material
    Pavement Marking Decision Tree – Project Level: For a New Surface or Replacing Existing Markings with a Different Material
    Marti, Michael ;
    Jackels, Jon
    2023-01-01 | PDF
    This Tool serves as a guide to assist agencies in understanding their options and determining which pavement marking material may be considered for a new surface or when replacing existing markings with a different material. That said, no one size fits all. Engineers should use their engineering judgment and seek expert advice when necessary.
  • TRACtion Transformative Transportation an Introduction
    TRACtion: Transformative Transportation – an Introduction
    University of California, Los Angeles. Institute of Transportation Studies  ...
    2023-01-01 | PDF
    TRACtion seeks to narrow community-academia gaps through an intentional, proactive effort to systematically and productively engage local nonprofits and CBOs to encourage cross-sector knowledge transmission; inspire the co-development of use-inspired research agendas; and mobilize UCLA knowledge and innovations to accelerate impact in the region. T ...
  • Louisiana Transportation Research Center Annual Report 20222023
    Louisiana Transportation Research Center: Annual Report 2022–2023
    Louisiana Transportation Research Center
    2023-01-01 | PDF
    This publication is a report of the transportation research, technology transfer, education, and training activities of the Louisiana Transportation Research Center for 2022-2023. The center is sponsored jointly by the Louisiana Department of Transportation and Development and Louisiana State University.
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