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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 3481 - 3500 of 36151 results
  • 2021 International Symposium on Transportation Data and Modelling
    2021 International Symposium on Transportation Data and Modelling
    Yin, Yafeng ;
    Mi, Tian
    2021-07-09 | PDF
    This project partially sponsored the organization of the 2021 International Symposium on Transportation Data and Modeling (ISTDM 2021), which aims to gather transportation researchers and practitioners across the globe for exploring the frontiers of big data, modeling and simulation to advance transportation research to support the connected, coope ...
  • Guidelines for Wildlife Vehicle Collision Mitigation
    Guidelines for Wildlife Vehicle Collision Mitigation
    Bramblee, Kit
    2021-07-07 | PDF
    Vehicle collisions with wildlife are a national problem that affects motorists in every U.S. state, and challenges state DOTs seeking to minimize these crashes. New data shows U.S. drivers on average have a 1 in 116 chance of a collision with an animal. The company estimates there were over 1.9 million animal collision insurance claims in the U.S. ...
  • 100 Biodiesel Vector Technology and Fuel Dispensing Solution A CTECH Live Lab Pilot Project for the Implementation and Evaluation of the 100 Biodiesel Technology on Identified Equipment Within Cornells Fleet Operations
    100% Biodiesel Vector Technology and Fuel Dispensing Solution — A CTECH Live Lab Pilot Project for the Implementation and Evaluation of the 100% Biodiesel Technology on Identified Equipment Within Cornell’s Fleet Operations
    Brumberg, Gregory ;
    Li, Lawrence
    2021-07-02 | PDF
    In this study, researchers analyzed whether it was feasible for Cornell vehicles to use the Vector System (VS) by Optimus Technologies, a system that modifies diesel engine vehicles to run on biodiesel in addition to diesel in cold weather conditions. Biodiesel solidifies at a higher temperature than diesel, so to use biodiesel in the winter, the V ...
  • Consideration of Automated Vehicle Benefits and Research Needs for Rural America
    Consideration of Automated Vehicle Benefits and Research Needs for Rural America
    Dowds, Jonathan ;
    Sullivan, James
    2021-07-01 | PDF
    Safety, mobility, accessibility challenges, and dependence on personal vehicles have long plagued rural transportation systems. Benefits in these areas are widely touted by autonomous vehicle (AV) advocates. Seven mechanisms for AV-induced increases in vehicle miles traveled (VMT) are reviewed here, and five of these mechanisms are expected to have ...
  • Expanding the UC Davis GIS Electric Vehicle Planning Toolbox Beyond California The Delaware Valley Regional Planning Commission Case Study
    Expanding the UC Davis GIS Electric Vehicle Planning Toolbox Beyond California: The Delaware Valley Regional Planning Commission Case Study
    Tal, Gil ;
    Lee, Jae Hyun
    2021-07-01 | PDF
    This project creates a toolkit that run in ArcGIS and allows users to project where electric vehicle (EV) owners will live, work, and charge. There are three distinct modules: market analysis, workplace charging, and home charging presented in block group level. The tool can be updated by the metropolitan planning organization (MPO) users to reflec ...
  • Evaluation of Commercially Available Concrete Bridge Deck Repair Materials
    Evaluation of Commercially Available Concrete Bridge Deck Repair Materials
    Maguire, Marc ;
    Sorensen, Andrew D.
    2021-07-01 | PDF
    Extensive investigation on rapid repair materials for concrete bridge decks is of utmost importance to limit the impact on traveling vehicles as well as selecting suitable materials with acceptable mechanical properties and durability requirements. The objective of this research project is to evaluate eight commercial cementitious rapid repair mate ...
  • A Model for Integrating Rail Services with other Transportation Modalities Identifying the Best Practices and the Gaps for Californias Next State Rail Plan
    A Model for Integrating Rail Services with other Transportation Modalities: Identifying the Best Practices and the Gaps for California’s Next State Rail Plan
    Peterson, Eric ;
    Wei, Wenbin
    2021-07-01 | PDF
    The California State Rail Plan (CSRP) is among the best rail plan documents published by any jurisdiction in the United States to date. As such, the CSRP is used in this paper as the basis of comparison to other state rail service plans. These plans will have been submitted to the Federal Railroad Administration (FRA) on record as of June 2020—as r ...
  • EarlyAge and Premature Cracking in Jointed Plain Concrete Pavements Literature Review
    Early-Age and Premature Cracking in Jointed Plain Concrete Pavements: Literature Review
    Mateos, Angel ;
    Harvey, John T
    2021-07-01 | PDF
    This technical memorandum includes a literature review about the factors that may lead to early-age and premature cracking of jointed plain concrete pavements (JPCPs). The review shows that many factors are involved and that many different circumstances can result in these types of cracking. In most of the cases reported in the literature, the earl ...
  • Geospatial Approaches to Enhancing MPO Community Engagement
    Geospatial Approaches to Enhancing MPO Community Engagement
    Orr, Meghan ;
    Olson, Ben
    2021-07-01 | PDF
    Metropolitan planning organizations are responsible for overseeing urban planning in every major urban region in the country. In recent years the importance of building engagement with constituents to create more equitable and inclusive urban planning models has become a heightened priority. This white paper explored the benefits and best practices ...
  • 2020 Critical Update to Caltrans Wildfire Vulnerability Analysis
    2020 Critical Update to Caltrans Wildfire Vulnerability Analysis
    Thorne, James H. ;
    Boynton, Ryan M
    2021-07-01 | PDF
    Catastrophic wildfires over the past five years (2015-2020) have caused damage to the Caltrans road network in 81 separate wildfire events, leading to expenditures of over $590,000,000 to repair highway assets. To reduce the risk of further wildfire damage and to improve public safety, particularly for disadvantaged communities, Caltrans has engage ...
  • Transportation as a Disease VectorA Modeling Approach
    Transportation as a Disease Vector—A Modeling Approach
    Meitiv, Alexander ;
    Sanchez, Kristen
    2021-07-01 | PDF
    Today’s interconnected world, linked by transportation networks, plays a major role in the spread of a pandemic such as COVID-19. The virus originated in a single community, but due to the global nature of transportation, it spread to other parts of the world, impacting local communities and repeating this cycle many times over. In the context of d ...
  • Effect of Clay Content on AlkaliCarbonate Reactive ACR Dolomitic Limestone
    Effect of Clay Content on Alkali-Carbonate Reactive (ACR) Dolomitic Limestone
    Milla, Jose ;
    Rupnow, Tyson
    2021-07-01 | PDF
    This study aimed to evaluate whether an aggregate’s clay content plays an overarching role in ACR expansion and deterioration within the limestone sources that have been approved for use in portland cement concrete in Louisiana. A total of 29 aggregate sources from the Louisiana Department of Transportation and Development (DOTD) approved materials ...
  • Joint Optimization of School Bus Routes and Lastmile Services
    Joint Optimization of School Bus Routes and Last-mile Services
    Zhang, Peter ;
    Hao, Hao
    2021-07-01 | PDF
    School bus routing across multiple districts requires the coordination of many resources. In this project, the authors plan to understand the challenges in current school bus routing in Allegheny County, Pennsylvania, and improve the mobility of students via decision analytical models and deployment of information technology tools. The main focus i ...
  • The Sidekick Routing Paradigm for VMT Reduction and Improved Accessibility
    The “Sidekick” Routing Paradigm for VMT Reduction and Improved Accessibility
    Carlsson, John Gunnar ;
    Jones, Bo
    2021-07-01 | PDF
    This project has combined tools from geospatial analysis, mathematical optimization theory, and computational geometry to study a routing paradigm that we call sidekick routing. A sidekick routing scheme is a logistical framework in which a large vehicle, such as a truck or van, serves as a mobile base for a fleet of small vehicles (the “sidekicks” ...
  • Influence of the Mount Evans Highway SH 5 on Alpine Wetland Hydrologic Processes Permafrost and Vegetation Colorado Rocky Mountains
    Influence of the Mount Evans Highway (SH 5) on Alpine Wetland Hydrologic Processes, Permafrost, and Vegetation, Colorado Rocky Mountains
    Shaw, Jeremy R. ;
    Cooper, David J.
    2021-07-01 | PDF
    The Mount Evans Highway (SH 5) has been severely damaged by permafrost degradation and freeze-thaw processes. We assessed the effects of the current roadway configuration on the permafrost, hydrologic processes, vegetation, and soils of the Summit Lake Park wetland complex. We also reviewed and synthesized available literature to develop design rec ...
  • Enhanced Assessment of Projected Landslide Activity Under Precipitation and Seismicity
    Enhanced Assessment of Projected Landslide Activity Under Precipitation and Seismicity
    Leshchinsky, Ben A. ;
    Booth, Adam
    2021-07-01 | PDF
    Regional assessments of potential landsliding are useful means of mitigating loss of life, property, and infrastructure, especially when exacerbated by rainfall and seismic events. Susceptibility maps are useful tools for characterizing hazard and risk tied to potential landslides. The method presented herein enables characterization of the area, v ...
  • Steps To Supplement ParkandRide Public Transit Access With RideandRide Shuttles
    Steps To Supplement Park-and-Ride Public Transit Access With Ride-and-Ride Shuttles
    Niles, John S ;
    Pogodzinski, J.M
    2021-07-01 | PDF
    Public transit ridership in California declined in the five years before the pandemic of 2020–21 and dropped significantly further after the pandemic began. A sharp downward step in the level of transit boarding occurred after February 2020, and continues to the date of this report as a result of the public-health guidance on social distancing, exp ...
  • Phase II
    Phase II
    Fukushige, Tatsuya ;
    Fitch, Dillon
    2021-07-01 | PDF
    Dock-less, electric bike-share services offer cities a new transportation option with the potential to improve environmental, social, and health outcomes. But these benefits accrue only if bike-share use replaces car travel. The purpose of this study is to examine factors influencing whether bike-share substitutes for driving and the degree to whic ...
  • Flexible Transit Services
    Flexible Transit Services
    Gonzales, Eric J. ;
    Christofa, Eleni
    2021-07-01 | PDF
    Public transit services in Massachusetts typically operate fixed routes with a published schedule. Fixed routes are not cost effective for serving low density, dispersed demand. The first part of this study is to conduct a theoretical analysis of the various forms of flexible transit service, ranging from deviating routes and schedules to fully dem ...
  • Performance Measurement Management Using Connected Automated Vehicle Data
    Performance Measurement & Management Using Connected & Automated Vehicle Data
    Hadi, Mohammed ;
    Sisiopiku, Virginia
    2021-07-01 | PDF
    The availability of connected vehicle (CV) data, even at lower market penetrations, can be sufficient to support critical transportation performance measurement and management functions. This study developed a framework, methods, and algorithms for using CV data to estimate measures to support agency processes. As such, the study investigated the u ...
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