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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 5741 - 5760 of 36958 results
  • Development of a Mode Choice Model To Estimate Evacuation Transit Demand
    Development of a Mode Choice Model To Estimate Evacuation Transit Demand
    Wilmot, Chester ;
    Bian, Ruijie
    2019-10-01 | PDF
    Since Hurricane Katrina, transit evacuation service has been seen to serve critical needs in affected cities and an increasing number of hurricanes have struck the east coast where more people rely on public transportation to evacuate. Thus, it is important to model mode choice in evacuation for a better estimation of evacuation transit demand. In ...
  • SNIP Light User Manual
    SNIP Light User Manual
    Tarko, Andrew P. ;
    Thomaz, Jose E.
    2019-10-01 | PDF
    A systemic approach to identifying road locations that exhibit safety problems was provided by the Safety Needs Identification Program (SNIP and SNIP2) developed by the Purdue University Center for Road Safety (CRS). The new version SNIP Light has been developed to provide other uses with planning level traffic safety analysis capability for a wide ...
  • Sustainability and Resiliency of Concrete Rapid Repairs Utilizing Advanced Cementitious Materials FreezeThaw Loads
    Sustainability and Resiliency of Concrete Rapid Repairs Utilizing Advanced Cementitious Materials: Freeze/Thaw Loads
    Adams, Matthew P. ;
    Bandelt, Matthew J
    2019-10-01 | PDF
    This report provides a review of advanced cementitious materials that can be used in transportation infrastructure to resist freeze-thaw loading durability conditions. The report begins by providing a literature review of the mechanical and durability properties of rapid repair systems. A summary of discussion points held during a workshop held on ...
  • Nonlinear Dimension Reduction for Hybrid Track Quality
    Nonlinear Dimension Reduction for Hybrid Track Quality
    Lasisi, Ahmed ;
    Attoh-Okine, Nii
    2019-10-01 | PDF
    Rail geometry defects constitute a major cause of accidents in the United States. Geometry related accidents are often very severe and damaging. While rail geometry-caused derailments continue to increase according to Federal Railroad Administration (FRA) safety data, track quality analysis remains effectively unchanged. The use of TQI or track qua ...
  • Load Rating of Bridge LOG471184 Engineering Research Services 20172020 Task 5
    Load Rating of Bridge LOG-47-1184: Engineering Research Services 2017-2020 Task 5
    Khoury, Issam ;
    Steinberg, Eric
    2019-10-01 | PDF
    Bridge LOG-47-1184, a four-lane concrete highway bridge, was instrumented and subjected to controlled vehicle load testing in May 2019. The load response data collected were used to generate load Rating Factors (RFs) via a three-dimensional finite element model (FEM) created using ABAQUS, which were compared to those generated by MIDAS/Civil softwa ...
  • Connected Vehicle VehicletoInfrastructure Support of Active Traffic Management
    Connected Vehicle Vehicle-to-Infrastructure Support of Active Traffic Management
    Hadi, Mohammed ;
    Iqbal, Md Shahadat
    2019-10-01 | PDF
    Connected vehicle (CV) technologies promise transformative changes in Active Traffic Management (ATM) of freeways and arterials and have the potential to support Integrated Corridor Management (ICM). The goal of this project was to provide information to support the Florida Department of Transportation (FDOT) and other transportation agencies in th ...
  • Evaluation of Highway Safety Improvement Projects and Countermeasures Technical Report
    Evaluation of Highway Safety Improvement Projects and Countermeasures: Technical Report
    Tsapakis, Ioannis ;
    Sharma, Sushant
    2019-10-01 | PDF
    The Highway Safety Improvement Program (HSIP) is a core Federal-aid, state-administered program in which each state is required to develop and establish planning, implementation, and evaluation processes. The goal of evaluation activities is to determine if highway safety improvements are achieving the desired results and the investments are worthw ...
  • Statewide Implementation of Innovative Safety Analysis Tools in Identifying Highway Safety Improvement Projects Technical Report
    Statewide Implementation of Innovative Safety Analysis Tools in Identifying Highway Safety Improvement Projects: Technical Report
    Tsapakis, Ioannis ;
    Holik, William
    2019-10-01 | PDF
    The Highway Safety Improvement Program (HSIP) aims to achieve a reduction in the number and severity of fatalities and serious injury crashes on all public roads by implementing highway safety improvement projects. Transportation agencies continuously try to find ways to improve their HSIP. Over the last few years, particular emphasis has been plac ...
  • 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 ...
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