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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 5241 - 5260 of 36022 results
  • Investigating the Optimum Performance of Snowplowable Reflective Pavement Markers
    Investigating the Optimum Performance of Snowplowable Reflective Pavement Markers
    Dwyer, Carmine E. ;
    Himes, Scott
    2019-11-01 | PDF
    This project investigated the installation and performance of snowplowable reflective pavement markers (SRPMs) to determine optimum pavement marker solutions and policies for roadways in Illinois. The research evaluated the performance of five traditional cast-iron and two plastic SRPMs on test sections of both asphalt and concrete pavements. Analy ...
  • Concrete Pavement Repairs with NonCementitious Materials Research Brief
    Concrete Pavement Repairs with Non-Cementitious Materials [Research Brief]
    Ram, Prashant V
    ORCID ICON IMG
    2019-11-01 | PDF
    The Wisconsin Department of Transportation (WisDOT) does its best to minimize traffic disruptions when repairing high-traffic roadways by limiting lane closures to off-peak (overnight) hours. WisDOT typically employs rapid-setting concrete or asphalt concrete, rather than conventional cementitious strategies, to meet the demands of these six-to-eig ...
  • Using the Portable XRF to IdentifyVerify Field Material Properties Research Project Capsule
    Using the Portable XRF to Identify/Verify Field Material Properties [Research Project Capsule]
    Milla, Jose ;
    Rupnow, Tyson
    2019-11-01 | PDF
    The objective of this study is to develop a methodology to apply a portable x-ray fluorescence (XRF) and attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy to Louisiana’s material needs, and to evaluate the efficiency of the portable devices to characterize relevant materials for acceptance.
  • Strengthening of Existing InvertedT Bent Caps Design Recommendations and Examples
    Strengthening of Existing Inverted-T Bent Caps: Design Recommendations and Examples
    Hurlebaus, Stefan ;
    Mander, John B.
    2019-11-01 | PDF
    Inverted-T bent caps have been widely used in Texas to reduce the overall elevation of bridges, to improve the available clearance beneath the beams, and to improve aesthetics. Since bridge design criteria have been improved and modified over the decades, many of the early inverted-T bent caps are deficient when evaluated against the current design ...
  • Regression Equations for Estimating Flood Discharges for the Eastern Coastal Plain Region of Maryland
    Regression Equations for Estimating Flood Discharges for the Eastern Coastal Plain Region of Maryland
    Thomas Jr, Wilbert O ;
    Sanchez-Claros, Windsor
    2019-11-01 | PDF
    Regression equations were updated for estimating the 1.25-. 1.50-, 2-, 5-, 10-, 25-, 50-, 100-, 200- and 500-year flood discharges for the Eastern Coastal Plain Region of Maryland. The regression equations were based on flood discharges for 36 stations and drainage area, in square miles; land slope, in percent; and hydrologic soils group A, in perc ...
  • Domestic Airline Fares Consumer Report Second Quarter 2019 Passenger and Fare Information
    Domestic Airline Fares Consumer Report: Second Quarter 2019 Passenger and Fare Information
    United States. Department of Transportation
    2019-11-01 | 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 ...
  • Asset Management Guide for Local Agencies
    Asset Management Guide for Local Agencies
    Robjent, Lyndon ;
    Clark, Perry
    2019-11-01 | PDF
    Asset management principles and practices are strongly aligned with sustainability concepts; aligning a local government’s asset management practices with its sustainability initiatives helps to improve the efficiency and effectiveness of service delivery and investment decisions. This Guidebook has been prepared by the Research Implementation Comm ...
  • Virginias First CorrosionResistant ASTM A1010 Steel Plate Girder Bridge
    Virginia’s First Corrosion-Resistant ASTM A1010 Steel Plate Girder Bridge
    Sharp, Stephen R ;
    Provines, Jason T.
    2019-11-01 | PDF
    This study documented the construction of the Route 340 Bridge in Waynesboro, Virginia, with maintenance-free corrosion-resistant steel girders, secondary members, and stainless steel fastener assemblies. This included documenting the material properties of ASTM A1010 (hereinafter “A1010”) steel plate; girder and secondary member fabrication; erect ...
  • Domestic Airline Fares Consumer Report First Quarter 2019 Passenger and Fare Information
    Domestic Airline Fares Consumer Report: First Quarter 2019 Passenger and Fare Information
    United States. Department of Transportation
    2019-11-01 | 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 ...
  • Monitoring Lateral Earth Pressures and Movements of Cut Retaining Walls
    Monitoring Lateral Earth Pressures and Movements of Cut Retaining Walls
    Marr, W Allen ;
    DiMaggio, Jerry A.
    2019-11-01 | PDF
    The design and performance of retaining walls requires accurate estimates of the lateral earth pressures for strength limit states and service limit states. Several design methods are available and are used to predict the lateral earth pressures acting on the wall as well as the lateral and vertical wall movements of the wall and of the soil behind ...
  • Research Management Peer Exchange Hosted by the Oregon Department of Transportation November 6 2019
    Research Management Peer Exchange: Hosted by the Oregon Department of Transportation, November 6, 2019
    Oregon Department of Transportation
    2019-11-01 | PDF
    The Oregon Department of Transportation (Oregon DOT) hosted a research management peer exchange on November 4, 5, and 6, in Salem, Oregon. The purpose of a peer exchange is to give all participants a means to improve the quality and effectiveness of their research efforts, processes and programs. The primary focus of the peer exchange was research ...
  • Critical Path for Project Development
    Critical Path for Project Development
    Kreis, Doug ;
    Gibson, Bryan
    2019-11-01 | PDF
    Overseeing the delivery of highway projects at the Kentucky Transportation Cabinet (KYTC) requires the successful coordination of activities and inputs from multiple external agencies and members of the agency’s Project Development team, who have varied disciplinary backgrounds. Despite the complexity of project delivery, the Cabinet presently does ...
  • Characterization and Quantification of Traffic Load Spectra in Texas Overweight Corridors and Energy Sector Zones Final Report
    Characterization and Quantification of Traffic Load Spectra in Texas Overweight Corridors and Energy Sector Zones: Final Report
    Ashtiani, Reza S. ;
    Morovatdar, Ali
    2019-11-01 | PDF
    Energy-related activities such as natural gas and crude oil production in Texas have created large volumes of overweight (OW) truck operations, resulting in expedited deterioration and premature failure of transportation infrastructures. This project’s primary goal was to develop a database of the site-specific axle load spectra for energy corridor ...
  • Economic Effect of Restricted Crossing UTurn Intersections in Louisiana Tech Summary
    Economic Effect of Restricted Crossing U-Turn Intersections in Louisiana [Tech Summary]
    Schneider, Helmut ;
    Zeringue, Kirk M.
    2019-11-01 | PDF
    The restricted crossing U-turn (RCUT) aka J-turn intersection is an innovative alternative intersection design that displaces left turn and through movements from the minor street in order to serve through traffic on the major street. The J-turn is capable of providing a relatively high level of service (LOS) to major road through traffic over a wi ...
  • Emerging Trends in Design Professional Liability Policies in Innovative Project Delivery
    Emerging Trends in Design Professional Liability Policies in Innovative Project Delivery
    Ashuri, Baabak ;
    Lee, Jung Hyun
    2019-11-01 | PDF
    Prepared in cooperation with the GDOT Office of Innovative Delivery, this research found the areas of challenges of design liability in the design–build environment, including: (a) issues related to design claims in design–build, (b) heightened standard of care in design–build, and (c) change in design professional liability insurance due to design ...
  • Economic Effect of Restricted Crossing UTurn Intersections in Louisiana
    Economic Effect of Restricted Crossing U-Turn Intersections in Louisiana
    Schneider, Helmut ;
    Barnes, Stephen
    2019-11-01 | PDF
    Economic Effect of Restricted Crossing U-The RCUT, aka J-turn intersection, is an innovative alternative intersection design that displaces leftturn and through movements from the minor street. There is sufficient evidence that these designs reduce severe injury crashes and the FHWA hence added them to their list of “Proven Safety Countermeasures.” ...
  • Pilot Implementation for Preventing Incorrect Turns at HighwayRail Grade Crossings
    Pilot Implementation for Preventing Incorrect Turns at Highway-Rail Grade Crossings
    Lin, Pei-Sung ;
    Wang, Zhenyu
    2019-11-01 | PDF
    Incorrect turns onto railroad tracks may occur if a highway-rail grade crossing is close to an intersection or a freeway on-ramp. This project aimed to evaluate three low-cost countermeasures to prevent incorrect turns onto railroad tracks: (1) elimination of potentially misleading pavement markings and signs before railroad crossings, (2) implemen ...
  • Regression Equations for Estimating Flood Discharges for the Western Coastal Plain Region of Maryland
    Regression Equations for Estimating Flood Discharges for the Western Coastal Plain Region of Maryland
    Thomas Jr, Wilbert O ;
    Sanchez-Claros, Windsor
    2019-11-01 | PDF
    Regression equations were updated for estimating the 1.25-. 1.50-, 2-, 5-, 10-, 25-, 50-, 100-, 200- and 500-year flood discharges for the Western Coastal Plain Region of Maryland. The regression equations were based on flood discharges for 23 stations and drainage area, in square miles; impervious area, in percent of the watershed; and hydrologic ...
  • Evaluating Effective Asphalt Content in CIR Mixtures
    Evaluating Effective Asphalt Content in CIR Mixtures
    Wegman, Daniel E. ;
    Sabouri, Mohammadreza
    2019-11-01 | PDF
    In this study, to evaluate the effect of emulsion reduction during the cold in-place recycling (CIR) process in the field, three laboratory CIR mix designs were performed using the same reclaimed asphalt pavement (RAP) material and emulsion at three different mixing temperatures. The mix design results showed that as the mixing temperature increase ...
  • Susceptibility of Bridge Steel and Concrete Components to Microbiological Influenced Corrosion MIC and Microbiological Influenced Deterioration MID in Florida Summary
    Susceptibility of Bridge Steel and Concrete Components to Microbiological Influenced Corrosion (MIC) and Microbiological Influenced Deterioration (MID) in Florida [Summary]
    Lau, Kingsley
    2019-11-01 | PDF
    Florida International University researchers investigated the effects of microbially induced corrosion (MIC) on steel. They experimented with a variety of protective methods to determine their ability to prevent or mitigate MIC.
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