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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 8101 - 8120 of 36151 results
  • Recent Advances in Sustainable Winter Road Operations A Book Proposal
    Recent Advances in Sustainable Winter Road Operations – A Book Proposal
    Shi, Xianming
    ORCID ICON IMG
    2017-05-05 | PDF
    Investing in winter transportation operations is essential and beneficial to the public and the economy. The U.S. economy cannot afford the cost of shutting down highways, airports, etc., during winter weather. In the northern U.S. and other cold-climate areas, winter maintenance operations are essential to ensure the safety, mobility, and producti ...
  • Evaluating Drugged Driving Effects of Pain and Anxiety Medications
    Evaluating Drugged Driving: Effects of Pain and Anxiety Medications
    Gaffney, Gary R. ;
    Brown, Timothy
    2017-05-05 | PDF
    To extend the National Advanced Driving Simulator’s research program into distracted driving and drug-influenced driving, our group studied the effects of a frequently prescribed combination of sedating drugs: hydrocodone/acetaminophen (an opioid pain-relieving medication) and alprazolam (a benzodiazepine useful for muscle relaxation and sedation). ...
  • Mitigation Strategies to Reduce Truck Crash Rates on Wyoming Highways
    Mitigation Strategies to Reduce Truck Crash Rates on Wyoming Highways
    Mashhadi, M Mahdi Rezapour ;
    Saha, Promothes
    2017-05-04 | PDF
    M Mahdi Rezapour Mashhadi (ORCID iD: 0000-0003-0774-737X); Promothes Saha, Ph.D., P.E. (ORCID iD: 0000-0003-3298-8327); Trenna Terrill (ORCID iD: 0000-0002-5239-6380); Khaled Ksaibati, Ph.D., P.E. (ORCID iD: 0000-0003-3532-6839)Wyoming has one of the highest large truck crash rates in the country. This is due to a variety of reasons which include: ...
    Supporting Files
  • Quantitative sensing of bridges railways and tunnels with autonomous unmanned aerial vehicles
    Quantitative sensing of bridges, railways, and tunnels with autonomous unmanned aerial vehicles.
    Yu, Tzuyang
    2017-05-04 | PDF
    Managing a growing population of deteriorated transportation infrastructuresystems (i.e. bridges, railways, tunnels) is one of biggest challenges faced by the nation.Traditional inspection and monitoring techniques (e.g., visual inspection, mechanicalsounding, rebound hammer, cover meter, electrical potential measurements, ultrasound,ground penetra ...
  • Length of Need and Minimum System Length for FShape Portable Concrete Barrier
    Length of Need and Minimum System Length for F-Shape Portable Concrete Barrier
    Bielenberg, Robert W. ;
    Meyer, Dylan T.
    2017-05-03 | PDF
    Portable concrete barrier (PCB) systems are often used to redirect errant vehicles through a combination of inertial resistance, lateral friction loads, and tensile loads developed from the mass and friction of the barrier segments. State departments of transportation (DOTs) and other end users may wish to utilize minimal length PCB installations t ...
  • Evaluation of Durability and Wear Characteristics of Viscous Fluid Dampers for Seismic Bridge Retrofits with Significant Sustained Traffic Loadings Santiago Creek Damper Tests
    Evaluation of Durability and Wear Characteristics of Viscous Fluid Dampers for Seismic Bridge Retrofits with Significant & Sustained Traffic Loadings: Santiago Creek Damper Tests
    Kad, Bimal ;
    Benzoni, Gianmario
    2017-05-03 | PDF
    In summer 2012 Caltrans replaced a set of six fluid viscous dampers at the Santiago Creek bridge after the earlier set installed in 1997 were reported to be leaking fluid. The recovered dampers were subsequently sent to UCSD for further testing and evaluation for durability and wear. This study extends an earlier examination of de-installed leaking ...
  • Testing and Evaluation of MASH TL3 Transition Between Guardrail and Portable Concrete Barriers
    Testing and Evaluation of MASH TL-3 Transition Between Guardrail and Portable Concrete Barriers
    Bielenberg, Robert W. ;
    Lingenfelter, Jessica L.
    2017-05-02 | PDF
    Three full-scale vehicle crash tests were conducted according to the Manual for Assessing Safety Hardware (MASH) Test Level 3 (TL-3) safety performance criteria on a transition between the Midwest Guardrail System (MGS) and a portable concrete barrier (PCB) system. The transition system utilized for test nos. MGSPCB-1 through MGSPCB-3 consisted of ...
  • Rapid Replacement of Bridge Deck Expansion Joints Phase II Tech Transfer Summary
    Rapid Replacement of Bridge Deck Expansion Joints – Phase II [Tech Transfer Summary]
    Jahren, Charles
    ORCID ICON IMG
    2017-05-01 | PDF
    This project investigated bridge deck expansion joint maintenance and replacement strategies and developed many novel ideas from others for improvement.
  • Snow removal performance metrics final report
    Snow removal performance metrics : final report.
    Xu, Gang ;
    Shi, Xianming
    2017-05-01 | PDF
    This document is the final report for the Clear Roads project entitled Snow Removal Performance Metrics. Theproject team was led by researchers at Washington State University on behalf of Clear Roads, an ongoing pooledfund research effort focused on winter maintenance materials, equipment, and methods. Clear Roads researchprojects are managed and a ...
  • Integration and Evaluation of Automated Pavement Distress Data in INDOTs Pavement Management System
    Integration and Evaluation of Automated Pavement Distress Data in INDOT’s Pavement Management System
    Alinizzi, Majed ;
    Qiao, Julie Yu
    2017-05-01 | PDF
    This study was in two parts. The first part established and demonstrated a framework for pavement data integration. This is critical for fulfilling QC/QA needs of INDOT’s pavement management system, because the precision of the physical location references is aprerequisite for the reliable collection and interpretation of pavement data. Such consis ...
  • Realtime Tracking and Choice Data
    Real-time Tracking and Choice Data
    Guensler, Randall
    ORCID ICON IMG
    2017-05-01 | PDF
    The primary goal of this project was to demonstrate that smartphone travel activity monitoring systems that collect second-by-second data are capable of providing more reliable freeway and arterial travel time data than machine vision systems that collect spot-speed data. The report outlines project coordination with state agencies, app functions, ...
  • GRTAGDOT RealTime Tracking and Choice Data
    GRTA/GDOT Real-Time Tracking and Choice Data
    Guensler, Randall
    ORCID ICON IMG
    2017-05-01 | PDF
    The primary goal of this project was to demonstrate that smartphone travel activity monitoring systems that collect second-by-second data are capable of providing more reliable freeway and arterial travel time data than machine vision systems that collect spot-speed data. The report outlines project coordination with state agencies, app functions, ...
  • Analyzing the Impact of Median Treatments on PedestrianBicyclist Safety
    Analyzing the Impact of Median Treatments on Pedestrian/Bicyclist Safety
    Zhang, Lei ;
    Ghader, Sepehr
    2017-05-01 | PDF
    To improve pedestrian/bicyclist safety, the Maryland Department of Transportation State Highway Administration (MDOT SHA) has identified several high-frequency pedestrian/bicyclist crash locations through the Pedestrian Roadway Safety Audit (PRSA) Program. Recognizing an over-representation of pedestrian crashes related to illegal mid-block crossin ...
  • Using Crowdsourcing to Prioritize Bicycle Route Network Improvements
    Using Crowdsourcing to Prioritize Bicycle Route Network Improvements
    LaMondia, Jeffrey ;
    Watkins, Kari
    2017-05-01 | PDF
    As the emphasis placed on cycling as a means of transportation is increasing in the United States, so is the need for adequate facilities that provide cyclists with a comfortable and connected facility. In order for these facilities to be built and encourage community residents to cycle, the city planners and engineers need to understand what type ...
  • BikePed Portal development of an online nonmotorized traffic count archive
    Bike-Ped Portal : development of an online nonmotorized traffic count archive.
    Nordback, Krista ;
    Tufte, Kristin
    2017-05-01 | PDF
    Robust bicycle and pedestrian data on a national scale would serve numerous purposes. Access to a centralized nonmotorized traffic countarchive can open the door for innovation through research, design and planning; provide safety researchers with a measure of exposure; providefundamental performance metrics for planning and funding decisions; and ...
  • Statewide analysis of bicycle crashes
    Statewide analysis of bicycle crashes.
    Alluri, Priyanka ;
    Raihan, Md Asif
    2017-05-01 | PDF
    Bicycle crashes are a major traffic safety concern in Florida. In 2014, Florida led the nation with 139 bicyclist fatalities, representing approximately 20% of the nation’s total. This project aims to improve bicycle safety on Florida’s state roads by conducting a comprehensive study focusing on both statewide and site-specific analyses. The specif ...
  • Develop metrics of tire debris on Texas highways technical report
    Develop metrics of tire debris on Texas highways : technical report.
    Avelar, Raul Eduardo ;
    Pratt, Michael P.
    2017-05-01 | PDF
    This research effort estimated the amount, characteristics, costs, and safety implications of tire debris on Texas highways. The metrics developed by this research are based on several sources of data, including a statewide survey of debris removal practices, field data from a probability sample of Texas roads, Texas Department of Transportation cr ...
  • The impact of Phase 1 of the Silver Line on the Northern Virginia transportation system
    The impact of Phase 1 of the Silver Line on the Northern Virginia transportation system.
    Murray-Tuite, Pamela ;
    Zhu, Shanjiang
    2017-05-01 | PDF
    The purpose of this study was to assess the impact of Phase 1 of the Washington Metropolitan Area Transit Authority’s Silver Line on the broad regional transportation system, and specifically on the road network operated by the Virginia Department of Transportation (VDOT). All of the data used in this study were aggregate and were provided by trans ...
  • 2015 RightofWay Fatality and Trespass Prevention Workshop
    2015 Right-of-Way Fatality and Trespass Prevention Workshop
    daSilva, Marco ;
    Harrison, James
    2017-05-01 | PDF
    In response to the successful 2008 and 2012 Trespasser Workshops, Federal Railroad Administration (FRA) sponsored the 2015 Right-of-Way (ROW) Fatality and Trespass Prevention workshop to keep up the momentum that had been previously established. The FRA Administrator (who was Acting Administrator at the time), gave the keynote speech, which was fol ...
  • OnBoardDiagnostics OBD Data Integration into Traffic Microsimulation for VehicleSpecific Fuel Use Emissions Modeling InVehicle App Testing
    On-Board-Diagnostics (OBD) Data Integration into Traffic Microsimulation for Vehicle-Specific Fuel Use & Emissions Modeling & In-Vehicle App Testing
    Washburn, Scott S. ;
    Frey, H. Christopher
    2017-05-01 | PDF
    The work reported here is for a study that aimed to: (1) evaluate the concordance between internally observable variable (IOV) based and externally observable variable (EOV) based predictors of engine power demand; (2) develop predictive models for vehicle energy use and emissions (EU&E) based on IOVs; (3) evaluate models for vehicle EU&E based on ...
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