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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 5781 - 5800 of 36990 results
  • Prototype Design and Evaluation of Hybrid Solid Oxide Fuel Cell Gas Turbine Systems for Use in Locomotives
    Prototype Design and Evaluation of Hybrid Solid Oxide Fuel Cell Gas Turbine Systems for Use in Locomotives
    Azizi, Ali ;
    Ahrend, Philipp
    2019-10-01 | PDF
    Hybrid solid oxide fuel cell-gas turbine (SOFC-GT) systems are among the most efficient and lowest emitting power generation systems conceived for use in locomotives. Their superiority was proven in stationary power applications with near-zero (natural gas operation) to zero (hydrogen operation) pollutant emissions. However, the feasibility and dyn ...
  • CalibrationDevelopment of Safety Performance Functions in New Jersey Technical Brief
    Calibration/Development of Safety Performance Functions in New Jersey: [Technical Brief]
    Ozbay, Kaan
    ORCID ICON IMG
    2019-10-01 | PDF
    The main objective of this research project is to (1) calibrate the SPFs provided in the HSM using New Jersey (NJ) data and (2) develop new NJ-specific SPFs as appropriate. The facility types considered for this research project include segments and intersections of rural two-lane two-way, rural multilane, and urban and suburban roads. The followin ...
  • Incorporating Active Transport Into the Regional Planning Process To Support First and Last Mile Travel
    Incorporating Active Transport Into the Regional Planning Process To Support First and Last Mile Travel
    Walthall, Rydell D. ;
    Walton, C Michael
    2019-10-01 | PDF
    This report details the creation and proper use of a comprehensive MPO database. The database details each MPO’s governance structure, committees, and travel demand modeling capabilities with an emphasis on non-automotive transportation modes. The report also outlines a resource to group MPOs by megaregion, which could aid with the comparison of pl ...
  • Navigating New Mobility Policy Approaches for Cities
    Navigating New Mobility: Policy Approaches for Cities
    Steckler, Becky ;
    Davidson, Jennifer
    2019-10-01 | PDF
    This purpose of this report is to help the cities of Gresham, Oregon and Eugene, Oregon understand the potential impacts of new mobility technologies – with an emphasis on autonomous vehicles (AVs) – and prepare a policy response. While Gresham and Eugene are case studies, it provides communities of all sizes information on how new mobility service ...
  • An Assessment of Intercity Bus Services in Illinois
    An Assessment of Intercity Bus Services in Illinois
    Metaxatos, Paul ;
    Sriraj, P S
    2019-10-01 | PDF
    Ongoing research about intercity bus operations in Illinois has reviewed federal and Illinois Department of Transportation (IDOT) intercity bus policies and regulations and obtained experiences from other states regarding their strategies to meet federal and state-level requirements. This study will examine the transportation providers’ viewpoint a ...
  • Rejuvenator Laboratory Characterization and Field Performance
    Rejuvenator Laboratory Characterization and Field Performance
    Zhou, Fujie ;
    Karki, Pravat
    2019-10-01 | PDF
    Recycled materials including reclaimed asphalt pavements (RAP) and recycled asphalt shingles (RAS) have been widely used in asphalt mixes in Texas with at least three benefits: reducing construction cost, conserving raw materials and environment, and improving rutting resistance. However, there are two major concerns over the use of RAP and RAS: va ...
  • Durability Aspects of Stabilized Quarry Byproduct Pavement Base and Subbase Applications
    Durability Aspects of Stabilized Quarry By-product Pavement Base and Subbase Applications
    Qamhia, Issam ;
    Tutumluer, Erol
    2019-10-01 | PDF
    Recent research conducted at the Illinois Center for Transportation (ICT-R27-168) evaluated sustainable applications of quarry by-products (QB) or QB blended with coarse-recycled aggregates as chemically stabilized base and subbase layers. The research proved that stabilized QB pavement applications have satisfactory pavement performance. This proj ...
  • Research and Support to Implement Recommendations of the GDOT Small Business Program Evaluation
    Research and Support to Implement Recommendations of the GDOT Small Business Program Evaluation
    Boston, Thomas D. ;
    Ross, Catherine L.
    2019-10-01 | PDF
    This report is designed to assist the Georgia Department of Transportation (GDOT) in implementing the recommendations of a previous study, GDOT RP 13-29, “Task A: Evaluation of GDOT’s Small Business Program,” which concluded that the most effective way for GDOT’s Small Business Program (SBP) to level the playing field for small businesses is to imp ...
  • Improving Camber Predictions for Prestressed Concrete Girders Part 2 of 2
    Improving Camber Predictions for Prestressed Concrete Girders: Part 2 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 ...
  • 2018 Assessment of the Practice of Public Involvement in Florida
    2018 Assessment of the Practice of Public Involvement in Florida
    Kramer, Jeff ;
    Tremblay, Nicole
    2019-10-01 | PDF
    This study was designed to document the current state of the practice of public involvement in transportation decision-making and provide an update to the 2006 report documenting public involvement in the state of Florida. A literature review was completed as the first phase. Surveys and interviews were then conducted with metropolitan planning org ...
  • Development of Statistical Models to Predict the Compressibility of Floridas Soils Summary
    Development of Statistical Models to Predict the Compressibility of Florida’s Soils [Summary]
    Nam, Boo Hyun
    2019-10-01 | PDF
    University of Central Florida researchers identified statistical models best suited for predicting compressibility parameters of Florida soils based on basic soil index parameters obtained during a geotechnical site investigation. For these models, they identified critical soil index properties to correlate compressibility parameters with laborator ...
  • Automated Identification and Quantification of Flexible and Rigid Pavement Distresses
    Automated Identification and Quantification of Flexible and Rigid Pavement Distresses
    Kargah-Ostadi, Nima ;
    Burchett, Thomas
    2019-10-01 | PDF
    This research project was conducted with the objective of evaluating the viability of using an automated computer application to detect, classify, and quantify cracks on flexible and rigid pavement surfaces from digital images, to be implemented in the annual Pavement Condition Survey (PCS). Phase I of this project was focused on identification and ...
  • 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 ...
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