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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 5761 - 5780 of 36958 results
  • Renewable Natural Gas Research Center Project
    Renewable Natural Gas Research Center Project
    Raju, Arun S.K. ;
    Roy, Partho Sarothi
    2019-10-01 | PDF
    Renewable Natural Gas (RNG) is an important alternative fuel that can help the State of California meet several greenhouse gas (GHG) reduction and renewable energy targets. Despite considerable potential, current RNG use on national and state levels are not significant. RNG production potential in California through thermochemical conversion was ev ...
  • Evaluation of Semicircular Bend Test for HMA Specialty Mixes Technical Brief
    Evaluation of Semi-circular Bend Test for HMA Specialty Mixes [Technical Brief]
    Bennert, Thomas
    2019-10-01 | PDF
    The purpose of this project was to research and evaluate the different variations (temperature, notch dimensions, load rates, etc.) of the Semi-Circular Bend (SCB) Flexibility Index (FI) test. This project was also aimed to develop a method of comparison of the fatigue performance results between the SCB FI and the Overlay Tester to help provide th ...
  • Field Demonstration of Tendon Imaging Method Summary
    Field Demonstration of Tendon Imaging Method [Summary]
    Alexander, Christopher ;
    Sagüés, Alberto A.
    2019-10-01 | PDF
    As part of a larger project (Project BDV25-977-24) to develop technology to inspect post-tensioning systems, University of South Florida researchers developed and field-tested a device that delivers and analyzes a cross-sectional image of a post-tensioning duct. The method and device are patented.
  • Development of Intelligent Vehicle Counting and Classification Sensor iVCCS
    Development of Intelligent Vehicle Counting and Classification Sensor (iVCCS)
    Muhammad, Siraj ;
    Refai, Hazem H.
    2019-10-01 | PDF
    The Internet of Things (IoT) is reshaping our world. Soon our lives will be based on smart technologies. According to IHS Markit forecasts, the number of connected devices will grow from 15.4 billion in 2015 to 30.7 billion in 2020. Forrester Research reports that fleet management and transportation sectors lead others in Io T growth. This may come ...
  • Improving Camber Predictions for Prestressed Concrete Girders Part 1 of 2
    Improving Camber Predictions for Prestressed Concrete Girders: Part 1 of 2
    Mante, David M ;
    Barnes, Robert W.
    2019-10-01 | PDF
    In precast, prestressed concrete construction, the eccentricity of the prestressing force typically results in a net upward girder deflection known as camber. Camber is first observed at the time of prestress transfer and tends to increase thereafter as a function of time-dependent material properties. While accurately predicted levels of camber ar ...
  • Evaluation of WBeam Guardrail Terminal Post in Sleeve
    Evaluation of W-Beam Guardrail Terminal Post in Sleeve
    Sheikh, Nauman M. ;
    Menges, Wanda L.
    2019-10-01 | PDF
    States with extreme winter weather are faced with difficulty in maintaining and repairing W-beam guardrail and end terminal posts installed in soil. Due to frozen soil conditions, posts installed directly in soil require more resources and equipment to repair and can delay repair of a damaged guardrail and/or end terminal. In addition, longer durat ...
  • Assessment of the Performance of Vehicular Traffic Signal Assemblies during Hurricane Force Winds Summary
    Assessment of the Performance of Vehicular Traffic Signal Assemblies during Hurricane Force Winds [Summary]
    Zisis, Ioannis
    2019-10-01 | PDF
    Florida International University researchers tested traffic signals in full-scale setups using realistic wind-loading.
  • Detection of Damage Precursors in Steel Components for LifeCycle Assessments
    Detection of Damage Precursors in Steel Components for Life-Cycle Assessments
    Hassiotis, Sophia ;
    Donskoy, Dimitri
    2019-10-01 | PDF
    The early identification of damage of fracture-critical members is of the outmost importance in the maintenance of a safe bridge infrastructure. A new Non-Destructive Evaluation method that gives an early warning of accumulating damage is been formulated herein. The Vibro-Acoustic Modulation method utilizes nonlinear interactions of a high frequenc ...
  • Assessment of the Richmond Districts Towing and Recovery Incentive Program Trip Pilot
    Assessment of the Richmond District’s Towing and Recovery Incentive Program (Trip) Pilot
    Dougald, Lance E ;
    Venkatanarayana, Ramkumar
    2019-10-01 | PDF
    On December 15, 2017, the Virginia Department of Transportation’s Richmond District began a towing and recovery incentive program (TRIP) pilot where tow companies receive a monetary bonus for clearing commercial vehicle crashes within 90 minutes. TRIP’s key objective is the facilitation of quick and safe clearance of commercial vehicle crashes thro ...
  • FloodFrequency Estimates for Ohio Streamgages Based on Data through Water Year 2015 and Techniques for Estimating FloodFrequency Characteristics of Rural Unregulated Ohio Streams
    Flood-Frequency Estimates for Ohio Streamgages Based on Data through Water Year 2015 and Techniques for Estimating Flood-Frequency Characteristics of Rural, Unregulated Ohio Streams
    Koltun, G.F.
    2019-10-01 | PDF
    The purpose of this report is to describe the results of a study to (1) estimate flood-frequency characteristics for selected streamgages in Ohio and adjacent states based on data collected through water year 2015; (2) develop and present techniques for estimating flood-frequency characteristics of rural, unregulated streams in Ohio; and (3) implem ...
  • Developing a Business Ecosystem Around Autonomous Vehicle Infrastructure in Indiana
    Developing a Business Ecosystem Around Autonomous Vehicle Infrastructure in Indiana
    Iyer, Ananth V ;
    Dunlop, Steven R
    2019-10-01 | PDF
    INDOT will soon be embarking on infrastructure planning to accommodate autonomous vehicles. This new technology affords the ability to impact economic value creation across the supply chain in Indiana, as well as foster economic development in Indiana to support these emerging technologies. This proposal will be a first cut towards exploring the de ...
  • Use of Laboratory Testing to Predict Premature Failures in Asphalt
    Use of Laboratory Testing to Predict Premature Failures in Asphalt
    Kusam, Abhilash ;
    Bacchi, Chris
    2019-10-01 | PDF
    In last few months, North Carolina Department of Transportation (NCDOT) has encountered recently paved sections exhibiting early distress throughout the state which is a major concern. NCDOT conducted an internal investigation on the causes of early distresses. And this investigation did not yield any conclusive results, hence; NCDOT recognized the ...
  • Assessing Increased Use of Reclaimed Asphalt Pavement in Asphalt Mixtures
    Assessing Increased Use of Reclaimed Asphalt Pavement in Asphalt Mixtures
    Nair, Harikrishnan ;
    Diefenderfer, Stacey D
    2019-10-01 | PDF
    In 2007, the Virginia Department of Transportation (VDOT) introduced specifications to allow asphalt surface mixtures to have up to 30% reclaimed asphalt pavement (RAP) without a change in the virgin binder grade. Since 2007, increasing material costs and a growing awareness of the quantity of RAP available for use have sparked interest in allowing ...
  • Development of Traffic Map Evaluation Tool for TMC Applications Summary
    Development of Traffic Map Evaluation Tool for TMC Applications [Summary]
    Stevanovic, Aleksandar
    2019-10-01 | PDF
    Florida Atlantic University researchers developed an online system, the Mapping Evaluation Tool (MET), that brings together traffic data from various sources and delivers it to traffic managers as a map.
  • Traffic Crash Variables in Wisconsin Research Brief
    Traffic Crash Variables in Wisconsin [Research Brief]
    Qin, Xiao
    2019-10-01 | PDF
    Traffic fatality and injury rates have steadily decreased since 1950 thanks to the collective impacts of law enforcement, driver education, highway engineering, emergency medical services and advancements in vehicle safety technologies. However, motor vehicle crashes are still a leading cause of death in Wisconsin.
  • FAA Center of Excellence Alternative Jet Fuels Environment Annual Technical Report 2019 For the Period October 1 2018 September 30 2019
    FAA Center of Excellence Alternative Jet Fuels & Environment: Annual Technical Report 2019: For the Period October 1, 2018 - September 30, 2019
    ASCENT Aviation Sustainability Center
    2019-10-01 | FAA Center of Excellence for Alternative Jet Fuels & Environment Annual Technical Reports | PDF
    This report covers the period October 1, 2018 through September 30, 2019. The Center was established by the authority of FAA solicitation 13-C-AJFE-Solicitation. During that time the ASCENT team launched a new website, which can be viewed at ascent.aero. The next meeting will be held virtually March 31 - April 1, 2020. Over the last year, the ASCEN ...
  • An Airborne Lidar Scanning and Deep Learning System for RealTime Event Extraction and Control Policies in Urban Transportation Networks
    An Airborne Lidar Scanning and Deep Learning System for Real-Time Event Extraction and Control Policies in Urban Transportation Networks
    Parrish, Christopher ;
    Hurwitz, David
    2019-09-30 | PDF
    Airborne light detection and ranging (lidar) and unmanned aircraft systems (UAS), also called drones, are emerging technologies that are of growing interest for a range of transportation applications. At the same time, machine learning is leading to rapid advances in the ability to automatically extract actionable information from lidar data. This ...
  • Developing a DataDriven Safety Assessment Framework for RITI Communities in Washington State
    Developing a Data-Driven Safety Assessment Framework for RITI Communities in Washington State
    Wang, Yinhai ;
    Sun, Wei
    2019-09-30 | PDF
    In the history of this country, rural, isolated, indigenous, and tribal (RITI) communities were commonly overlooked with regards to social infrastructure and support. This issue is evident in the development of the transportation networks of these areas and the distinct lack of road safety in these types of communities. RITI communities carry a sig ...
  • 2019 Northeast Connected and Automated Vehicle Summit Report
    2019 Northeast Connected and Automated Vehicle Summit Report
    Jackson, Eric ;
    Auguste, Marisa
    2019-09-30 | PDF
    The Northeast Connected and Automated Vehicle Summit was hosted by the Connecticut Department of Transportation, the Federal Highway Administration, and the University of Connecticut on June 12-13, 2019, at the Hartford Hilton Hotel. The event provided an open forum for stakeholders in the Northeast to network, share, and discuss a wide range of to ...
  • Pile Length Determination at Unknown Bridge Foundations
    Pile Length Determination at Unknown Bridge Foundations
    Samu, Vivek ;
    Guddati, M. N.
    2019-09-30 | PDF
    A new methodology to estimate unknown pile length called Effective Dispersion of Reflections (EDAR) was developed. A software package was also developed for seamless application of the methodology. EDAR software facilitates data acquisition in the field and the subsequent analysis of the data to estimate pile length. In addition to providing length ...
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