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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 5561 - 5580 of 36022 results
  • Vehicle Automation and Transportability of Crash Modification Factors
    Vehicle Automation and Transportability of Crash Modification Factors
    Davis, Gary ;
    Gao, Jingru
    2019-07-01 | PDF
    Although the Highway Safety Manual (HSM) now provides empirical tools for predicting the safety consequences of highway engineering decisions, these tools represent the prevailing driver and vehicle conditions in the United States during the last few decades. As automated vehicles improve in capability and increase in market share, these conditions ...
  • Investigation of Tack Coat Materials Tracking Performance
    Investigation of Tack Coat Materials Tracking Performance
    Bahia, Hussain U. ;
    Sufian, Abu
    2019-07-01 | PDF
    This research evaluated the performance of asphalt emulsion tack coat used in Wisconsin to provide recommendations that make tack coat usage more efficient and effective. The study focused on measuring curing as measured by moisture loss, tracking as measured by a bond strength test and a wheel tracking device in the lab, and Interlayer Shear Stren ...
  • Requirements for Use of FieldCast Proprietary UltraHighPerformance Concrete in Florida Summary
    Requirements for Use of Field-Cast, Proprietary Ultra-High-Performance Concrete in Florida [Summary]
    Riding, Kyle
    ORCID ICON IMG
    2019-07-01 | PDF
    University of Florida researchers developed a method to measure the UHPC tensile stress-strain relationship. They also developed a specification for material acceptance of field-cast UHPC.
  • Estimation of System Performance and Technology Impacts to Support Future Year Planning Summary
    Estimation of System Performance and Technology Impacts to Support Future Year Planning [Summary]
    Hadi, Mohammed
    ORCID ICON IMG
    2019-07-01 | PDF
    Florida International University researchers developed a plan for extending the Florida Intelligent Transportation System Evaluation Tool (FITSEVAL) with measurements and forecasting abilities that take advantage of state-of-the-art models, methods, and data from multiple sources to incorporate emerging technologies. This update primarily corrects ...
  • Development and Implementation of Sustainable Transportation Resilience Indicators
    Development and Implementation of Sustainable Transportation Resilience Indicators
    Abkowitz, Mark ;
    Camp, Janey
    2019-07-01 | PDF
    Communities are complex systems subject to a variety of hazards that can result in significant disruption to critical functions. Community resilience assessment is gaining popularity as a means to help communities better prepare for, respond to, and recover from disruption. Sustainable resilience, a recently developed concept, requires communities ...
  • Structural Health Monitoring of Highway Bridges Subjected to Overweight Vehicles Phase II Field Deployment
    Structural Health Monitoring of Highway Bridges Subjected to Overweight Vehicles, Phase II – Field Deployment
    Judd, Johnn ;
    Barker, Michael
    2019-07-01 | PDF
    This report describes Phase II of a research project to develop a structural health monitoring system for highway bridges subjected to overweight trucks. Two field tests were conducted. The Laramie River bridge, located at mile post (MP) 312.33, on Interstate-80 (I-80), in Laramie, Wyoming, was tested to evaluate bridge behavior and to develop a pr ...
  • Using Information at Different Spatial Scales to Estimate Demand to Support Asset Management Decision Making
    Using Information at Different Spatial Scales to Estimate Demand to Support Asset Management Decision Making
    Jahan, Israt ;
    McNeil, Sue
    2019-07-01 | PDF
    Quantifying disaster recovery is important to be able to match resources to needs. The research explores the use of survey data, FEMA assessment data, aerial photographs and LIDAR data in the context of recovery from 2012 Hurricane Sandy in Sea Bright, New Jersey. The data cover the period 2010 to 2015. Each of the data sources differ in terms of c ...
  • Identifying Highly Correlated Variables Relating to the Potential Causes of Reportable Wisconsin Traffic Crashes
    Identifying Highly Correlated Variables Relating to the Potential Causes of Reportable Wisconsin Traffic Crashes
    Qin, Xiao ;
    Shaon, Mohammad Razaur Rahman
    2019-07-01 | PDF
    The goal of this research project is to provide the Wisconsin Department of Transportation (WisDOT) with the state of art methodologies for identifying the most pertinent behavioral and engineering variables relating to reportable crashes. In this regard, an extensive literature review has been performed to summarize the latest progress in crash mo ...
  • Issues Pertaining to Rebuilt Vehicle Titles
    Issues Pertaining to Rebuilt Vehicle Titles
    Keathley, Valerie ;
    Martin, Andrew
    2019-07-01 | PDF
    In Kentucky, salvage titles are issued when a vehicle has been wrecked, destroyed, or damaged and the cost of repairs exceeds 75 percent of the vehicle’s fair market value. Once a vehicle is repaired to roadworthy condition it is issued a rebuilt title. Kentucky issued 110,000 rebuilt and salvage titles in 2018. Over the 2014 to 2018 period, the nu ...
  • Seismic Performance of Circular Concrete Filled Steel Tube Columns for Accelerated Bridge Construction
    Seismic Performance of Circular Concrete Filled Steel Tube Columns for Accelerated Bridge Construction
    Tucker, Catherine ;
    Ibarra, Luis
    2019-07-01 | PDF
    This study evaluates the seismic performance of circular concrete-filled tube (CCFT) columns in accelerated bridge construction (ABC) projects. CCFT components are considered of interest for bridges subjected to seismic forces due to their efficient structural behavior under combined axial and bending loads: lateral stiffness of the steel tube is i ...
  • Development of Load Rating Procedures for Deteriorated Steel Beam Ends Deliverable 4 Final Report
    Development of Load Rating Procedures for Deteriorated Steel Beam Ends: Deliverable 4: Final Report
    Tzortzinis, Georgios ;
    Gerasimidis, Simos
    2019-07-01 | PDF
    This study focuses on the current strength evaluation policies for strength assessment of corroded steel girders and investigates potential improvements based on real corrosion data. The research work included in this report has three phases. First, the current deterioration condition of steel bridges is studied through MassDOT inspection reports o ...
  • Investigation of Delta Tc for Implementation in Indiana
    Investigation of Delta Tc for Implementation in Indiana
    McDaniel, Rebecca S. ;
    Shah, Ayesha
    2019-07-01 | PDF
    The current Superpave asphalt binder specifications do not address durability issues and do not adequately address fatigue. Several approaches have been proposed by different researchers to address both these durability issues. Some of the proposed refinements are quite complex, but one, ΔTc (delta Tc), is gaining favor because it is computationall ...
  • Roadway Kinetic Energy Capture and Conversion Phase 1
    Roadway Kinetic Energy Capture and Conversion, Phase 1
    Kaya, Savas ;
    Nazzal, Munir D.
    2019-07-01 | PDF
    Alternative energy generating assets, such as solar, piezoelectric, electrostatic and electrodynamic generators and wind turbines in and along the highways can capture and convert otherwise wasted ambient energy, which may provide an opportunity to reduce cost, prepare for future needs and even generate revenue. In this Phase-1 project, a review of ...
  • Structural Coefficient for High Polymer Modified Asphalt Mixes Summary
    Structural Coefficient for High Polymer Modified Asphalt Mixes [Summary]
    Sebaaly, Peter E.
    ORCID ICON IMG
    2019-07-01 | PDF
    University of Nevada, Reno (UNR), researchers determined the structural coefficient for asphalt concrete mixes manufactured with a high polymer (HP) modified asphalt binder that contains approximately 7.5% Styrene-Butadiene-Styrene (SBS) polymer.
  • Characterizing The Trip Generation Profiles Of Multifamily Housing
    Characterizing The Trip Generation Profiles Of Multifamily Housing
    Clifton, Kelly J. ;
    Currans, Kristina M.
    2019-07-01 | PDF
    Cities are increasingly wanting to assess the impacts new development has on all modes in the transportation system. Many communities are requiring site-level transportation impact analysis to examine travel outcomes. The historical focus on developing data and methods exclusively for the automobile, such as the Institute of Transportation Engineer ...
  • Performance Evaluation of Typical UDOT Surface Treatments
    Performance Evaluation of Typical UDOT Surface Treatments
    Romero, Pedro ;
    Bao, Shuangli
    2019-07-01 | PDF
    Fourteen Thin-Lift Treatments (TLTs) in UDOT’s Region 2 were evaluated over a five-year period in order to assess their performance. Surface distress data was quantified using Pavement Condition Indices (PCIs) and Remaining Service Life (RSL) were estimated following procedures utilized by UDOT. With the first 5 years’ evaluation, 2 TLTs sections h ...
  • Teen Driver Support System Technology Transfer
    Teen Driver Support System Technology Transfer
    Davis, Brian
    2019-07-01 | PDF
    The Teen Driver Support System (TDSS) is a smartphone application designed to provide real-time, in-vehicle feedback to novice drivers about their driving behavior to help them make safer driving decisions. The app provides warnings to the driver using in-phone sensors and maps to determine when the driver engages in in risky behavior. TDSS was eva ...
  • The Unresolved Relationship between Street Trees and Road Safety
    The Unresolved Relationship between Street Trees and Road Safety
    Marshall, Wesley E. ;
    Golombek, Yaneev
    2019-07-01 | PDF
    The roadside area where fixed-object hazards are explicitly minimized is called the clear zone, which became standard design practice soon after the 1966 Congressional hearings on road and automobile safety. Mounting evidence, however, is beginning to cast doubt on what we think we know about the impact of roadside clear zones on actual safety outc ...
  • Dynamics and Uncertainty in Land Use Conversion for Perennial Energy Crop Production Exploring Effects of Payments for Ecosystem Services Policies
    Dynamics and Uncertainty in Land Use Conversion for Perennial Energy Crop Production: Exploring Effects of Payments for Ecosystem Services Policies
    Li , Xiaogu ;
    Zipp, Katherine Y
    2019-07-01 | PDF
    Perennial energy crops like switchgrass that are used for biofuel production have the potential to generate various water quality benefits such as reduced nitrogen runoff. Yet the current expected returns to switchgrass are not profitable enough for these crops to be widely adopted by U.S. farmers due to relatively unstable yields, volatile revenue ...
  • Dynamic Flashing Yellow Arrow FYA A Study on Variable Left Turn Mode Operational and Safety Impacts Phase III Summary
    Dynamic Flashing Yellow Arrow (FYA) – A Study on Variable Left Turn Mode Operational and Safety Impacts – Phase III [Summary]
    Abou-Senna, Hatem
    2019-07-01 | PDF
    University of Central Florida researchers continued a project to increase the effectiveness of FYA signals by developing hardware that can interface with a wide variety of controllers and software to automatically select left-turn modes, in real time, based on gaps in opposing traffic and using existing sensors.
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