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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 4321 - 4340 of 36908 results
  • Bidding of Accelerated Bridge Construction Projects: Case Studies and Consensus Building [supporting datasets]
    Freeseman, Katelyn ;
    Shane, Jennifer S.
    2021-01-01 | PDF
    Accelerated bridge construction (ABC) is a solution for upgrading substandard bridges that reduces construction and closure times and minimizes exposure of the traveling public and road workers to construction activities. To take full advantage of the benefits of ABC, agencies should decide which projects are appropriate for ABC and how to bid thes ...
    Dataset Supporting Files
  • Impact of Transitways on Travel on Parallel and Adjacent Roads and Parkandride Facilities
    Impact of Transitways on Travel on Parallel and Adjacent Roads and Park-and-ride Facilities
    Webb, Alex ;
    Tao, Tao
    2021-01-01 | PDF
    Transitways such as light rail transit (LRT) and bus rapid transit (BRT) provide fast, reliable, and high-capacity transit service. Transitways have the potential to attract more riders and take a portion of the automobile mode share, reducing the growth of automobile traffic. Park-and-ride (PNR) facilities can complement transit service by providi ...
  • Investigating Potential Solutions to the Barrier Effect of Interstate 80 on Pronghorn Movements
    Investigating Potential Solutions to the Barrier Effect of Interstate 80 on Pronghorn Movements
    Robb, Benjamin S ;
    Rudd, William J
    2021-01-01 | PDF
    Pronghorn rely on long-distance migrations to access seasonal resources and mitigate the consequences of severe winters and droughts. When barriers sever routes to alternative habitats then pronghorn populations may decline as a result of loss of habitat. Wyoming highways and interstates include woven-wire ROW fencing along the road. Such fencing c ...
  • Guidance for Evaluating Traffic Safety Culture Strategies
    Guidance for Evaluating Traffic Safety Culture Strategies
    Austin, Eric ;
    Otto, Jay
    2021-01-01 | PDF
    This project conducted a literature review of current practices in the evaluation of traffic safety culture strategies. This review focused on transportation safety literature but also extended to evaluating safety culture in other public health sectors. A description of the literature was provided as a report, which was also converted to a journal ...
  • Improving the Foundation Layers for Concrete Pavements Lessons Learned and a Framework for Mechanistic Assessment of Pavement Foundations
    Improving the Foundation Layers for Concrete Pavements: Lessons Learned and a Framework for Mechanistic Assessment of Pavement Foundations
    White, David J. ;
    Vennapusa, Pavana K. R.
    2021-01-01 | PDF
    This report summarizes the key findings and lessons learned from the series of field, laboratory, and advanced numerical studies performed under Federal Highway Administration (FHWA) Transportation Pooled Fund Study TPF-5(183). This research program was established by the partnering state departments of transportation (DOTs) to identify opportuniti ...
  • GTFSRide Transit Ridership Data Standard Ecosystem Development
    GTFS-Ride: Transit Ridership Data Standard Ecosystem Development
    Porter, J. David ;
    Carleton, Phillip
    2021-01-01 | PDF
    This report documents the results of a research project whose objective was to build on the results of project SPR 803 to identify the value proposition for adoption of the GTFS-ride data standard and to continue to develop an ecosystem of supporting software tools. By completing this project, the current state of practice, level of technical capab ...
  • Hierarchical Prioritybased Control of Signalized Intersections in SemiConnected Corridors
    Hierarchical Priority-based Control of Signalized Intersections in Semi-Connected Corridors
    Hajbabaie, Ali ;
    Mehrabipour, Mehrzad
    2021-01-01 | PDF
    In this project, the authors developed an efficient distributed yet coordinated algorithm to control signalized intersections in connected and semi-connected corridors. The research enhances traffic signal optimization formulations to allow for the incorporation of connected vehicles and existing point detector data in the models, the distribution ...
  • Promoting the Transportation Systems Management and Operations Program in Kansas
    Promoting the Transportation Systems Management and Operations Program in Kansas
    Kondyli, Alexandra ;
    Schrock, Steven D.
    2021-01-01 | PDF
    This research investigated the current level of Transportation Systems Management and Operations (TSMO) implementation and integration within the Kansas Department of Transportation (KDOT) at the headquarters and all areas and districts in Kansas. This investigation is of particular importance to KDOT because it will initiate implementation of a st ...
  • Access to Opportunities Primer
    Access to Opportunities Primer
    Bhusal, Samikchhya ;
    Blumenberg, Evelyn
    2021-01-01 | PDF
    Transportation allows people to reach the opportunities that they need to participate in social and economic life. It enables workers to get to jobs to earn a living, students to get to school to obtain an education, or people to see a doctor to get healthy. But for people who lack transportation, whether it be because they do not own vehicles or b ...
  • Global Disruptions in the Transportation Sector The Effect of Ridehailing Services and the COVID19 Pandemic
    Global Disruptions in the Transportation Sector: The Effect of Ridehailing Services and the COVID-19 Pandemic
    Malik, Jai
    ORCID ICON IMG
    2021-01-01 | PDF
    In this study we explore the factors that affect the use of ridehailing services (Uber, Lyft) as well as adoption of shared (pooled) ridehailing (UberPOOL, Lyft Share) using data collected in California in fall 2018 using cross-sectional travel surveys. We estimate a semi-ordered bivariate probit model using this dataset. Among other findings, the ...
  • Modeling Operational Performance of Urban Roads with Heterogeneous Traffic Conditions
    Modeling Operational Performance of Urban Roads with Heterogeneous Traffic Conditions
    Kodupuganti, Swapneel R ;
    Mathew, Sonu
    2021-01-01 | PDF
    The rapid growth in population and related demand for travel during the past few decades has had a catalytic effect on traffic congestion, air quality, and safety in many urban areas. Transportation managers and planners have planned for new facilities to cater to the needs of users of alternative modes of transportation (e.g., public transportatio ...
  • Effectiveness of Entertaining NonTrafficRelated Messages on Dynamic Message Signs
    Effectiveness of Entertaining, Non-Traffic-Related Messages on Dynamic Message Signs
    Kondyli, Alexandra ;
    Schrock, Steven D.
    2021-01-01 | PDF
    This research used a fixed-base driving simulator to determine the effects of dynamic message signs (DMSs) on driver behavior. A DMS notifies drivers with safety, weather, incident, or traffic condition messages. Recently, however, state Departments of Transportation (DOTs) display safety messages with entertaining content. The Kansas DOT (KDOT) wa ...
  • Application of Industrial Ecology Principles in the Bioenergy Sector in California
    Application of Industrial Ecology Principles in the Bioenergy Sector in California
    Ro, Jin Wook
    2021-01-01 | PDF
    Bioenergy has long been a promising solution to reduce the greenhouse gas (GHG) emissions from the transportation, electric power, and natural gas sectors, and thus, it has been promoted by policies in the interest of climate change mitigation globally. In the United States, environmental policies such as the federal Renewable Fuel Standard (RFS) a ...
  • Building a Smart Work Zone Using Roadside LiDAR
    Building a Smart Work Zone Using Roadside LiDAR
    Darwesh, Amir ;
    Wu, Dayong
    2021-01-01 | PDF
    Work Zone (WZ) related injuries and fatalities from vehicular crashes are rising because of the increasing maintenance needs of the aging transportation infrastructure in the United States. Although many potential benefits from commercial WZ intrusion technologies have been recognized, they have not seen widespread adoption due to cost, simplicity, ...
  • Analysis of an IncentiveBased Smartphone Application for Young Drivers
    Analysis of an Incentive-Based Smartphone Application for Young Drivers
    Henk, Russell H. ;
    Munira, Sirajum
    2021-01-01 | PDF
    Traffic crashes remain the leading cause of unintentional youth deaths and injuries across the United States. Development of new and innovative interventions continues, with the aim of addressing this public health issue for the high-risk youth driving population. This report shares results associated with an incentive-based smartphone application ...
  • Analysis of an Incentive-Based Smartphone Application for Young Drivers [supporting datasets]
    Henk, Russell H. ;
    Munira, Sirajum
    2021-01-01 | PDF
    Traffic crashes remain the leading cause of unintentional youth deaths and injuries across the United States. Development of new and innovative interventions continues, with the aim of addressing this public health issue for the high-risk youth driving population. This report shares results associated with an incentive-based smartphone application ...
    Dataset Supporting Files
  • Field and Analytical Study for Deteriorating Precast DoubleTee Girder Bridges
    Field and Analytical Study for Deteriorating Precast Double-Tee Girder Bridges
    Seo, Junwon ;
    Kidd, Brian
    2021-01-01 | PDF
    This project discusses the performance of deteriorating double-tee (DT) girder bridges that have been in service for many years. This included field testing of two single-span DT girder bridges in South Dakota for live load distribution factors (LLDFs) and dynamic load allowance (IM). The LLDFs and IM were determined using strain data measured duri ...
  • 2020 Commodity Flow Survey Workshop September 24 2020
    2020 Commodity Flow Survey Workshop [September 24, 2020]
    Lawson, Catherine T. ;
    Hu, Patricia S.
    2021-01-01 | PDF
    The Commodity Flow Survey (CFS) Workshop represents the joint efforts of the Transportation Research Board (TRB), the U.S. Department of Transportation (DOT) Bureau of Transportation Statistics (BTS) and the TRB Standing Committee on Freight Transportation Data. The 2020 CFS Workshop was timed to coincide with the release of the 2017 CFS data table ...
  • Infrastructure Academy Transportation Program
    Infrastructure Academy Transportation Program
    Hashemian, Hassan
    2021-01-01 | PDF
    The College of Engineering, Computer Science, and Technology at the California State University, Los Angeles has expanded its National Summer Transportation Institute into a year-long program by creating the Infrastructure Academy Transportation Program (IATP). The goal of this program is to build a pipeline of diverse, well qualified young people ...
  • Review of Special Provisions and Other Conditions Placed on GDOT Projects For Imperiled Aquatic Species Protection Volume I
    Review of Special Provisions and Other Conditions Placed on GDOT Projects For Imperiled Aquatic Species Protection, Volume I
    Nelson, Jace M ;
    Stephens, Timothy A
    2021-01-01 | PDF
    Georgia has numerous protected freshwater species, which means that the Georgia Department of Transportation (GDOT) must frequently consult with federal and state agencies to identify measures to avoid, minimize and mitigate impacts to imperiled aquatic organisms. Some of these measures, such as restrictions on in-water work during the reproductive ...
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