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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 7241 - 7260 of 36114 results
  • CRASH TEST AND EVALUATION OF RESTRAINED SAFETYSHAPE CONCRETE BARRIERS ON CONCRETE BRIDGE DECK
    CRASH TEST AND EVALUATION OF RESTRAINED SAFETY-SHAPE CONCRETE BARRIERS ON CONCRETE BRIDGE DECK
    Williams, William F. ;
    Sheikh, Nauman M.
    2018-01-01 | PDF
    This research designed and tested a new portable concrete barrier that meets the performance of MASH TL-4 and can be used in temporary and permanent applications on bridge decks. Additionally, this new barrier system will minimize deflection, allowing placement of the barrier system as close to the edge of the deck system without compromising barri ...
  • The Pedestrian and Bicyclist Safety Risk Assessment Tool Users Manual
    The Pedestrian and Bicyclist Safety Risk Assessment Tool: User's Manual
    University of Michigan. Transportation Research Institute  ...
    2018-01-01 | PDF
    This web tool is an easy to use intuitive interface that uses Google maps to display and organize the results. This manual provides you with a basic understanding of how to navigate the tool. Additionally, we provide a case study of a possible use of the tool. For a more detailed description of the methodology underlying this tool, please see https ...
  • TxDOT 0-6863: Pretensioned Concrete Bent Caps Phase 1 Experimental Dataset
    Lee, DongJu ;
    McKee, Codi D.
    2018-01-01 | ZIP
    This dataset contains metadata and data collected during TxDOT Project 0-6863 on development of standards for precast, pretensioned concrete bent caps. Phase 1 tests are contained in this dataset. Phase 1 consisted of four specimens: 1. RCS-16-12: A solid reinforced concrete bent cap with 16 longitudinal rebar and 12" spacing of shear reinforcement ...
    Dataset Supporting Files
  • Optimization of Zero Emission Hydrogen Fuel Cell Ferry Design with Comparisons to the SFBREEZE
    Optimization of Zero Emission Hydrogen Fuel Cell Ferry Design, with Comparisons to the SF-BREEZE
    Pratt, Joseph W ;
    Klebanoff, Leonard E
    2018-01-01 | PDF
    Zero emission hydrogen fuel cell technology has the potential to drastically reduce total “well-to-waves” maritime emissions. Through realistic design studies of five commercially-relevant passenger vessels, this study examines the most cost-effective entry points in the US fleet for deploying today’s available technology, and includes analysis of ...
  • Impact of Recycled Asphalt Shingles RAS on Asphalt Binder Performance
    Impact of Recycled Asphalt Shingles (RAS) on Asphalt Binder Performance
    Roque, Reynaldo ;
    Yan, Yu
    2018-01-01 | PDF
    This study evaluated the effect of reclaimed asphalt pavement (RAP) and recycled asphalt shingles (RAS) on virgin binder true grade and fracture energy density (FED). A mortar approach, which avoids the need for binder extraction, was adopted to quantify the RAP/RAS effect on virgin binder true grades by using the grade change rate (GCR) parameter. ...
    Supporting Files
  • Evaluation and Correlation of the Dynamic Friction Tester on Iowa Pavement Surfaces
    Evaluation and Correlation of the Dynamic Friction Tester on Iowa Pavement Surfaces
    Iowa. Department of Transportation
    2018-01-01 | PDF
    Frictional properties of pavement surface materials on roadway shoulders and highway ramps are of concern to state and county pavement engineers. Currently, the frictional properties of pavement surfaces are obtained via testing with a locked‐wheel skid trailer. Operational limitations prohibit the use of a locked‐wheel skid trailer on roadway shou ...
  • Strategic Design for Delivery with Linked Transportation Assets Trucks and Drones
    Strategic Design for Delivery with Linked Transportation Assets : Trucks and Drones
    Campbell, James F. ;
    Sweeney II, Donald C.
    2018-01-01 | PDF
    Home delivery by drones as an alternative or complement to traditional delivery by trucks is attracting considerable attention from major retailers and services, as well as startups. While drone delivery may offer considerable economic savings, the fundamental issues of how best to deploy drones for home delivery are not well understood. Our resear ...
  • Condition Evaluation of Inservice Chemically Stabilized Subgrades in a High Sulfate Environment
    Condition Evaluation of In-service Chemically Stabilized Subgrades in a High Sulfate Environment
    Sargand, Shad ;
    Khoury, Issam
    2018-01-01 | PDF
    This project included measurements of strength properties, soil properties, and chemical content of natural and chemically stabilized subgrade soil from five projects across Ohio, three from sites that have historically had high sulfate content, and two that have not. The objective was to compare the properties of the soils from the sites and deter ...
  • The Impact of Vehicle Automation on the Safety of Vulnerable Road Users Pedestrians and Bicyclists
    The Impact of Vehicle Automation on the Safety of Vulnerable Road Users (Pedestrians and Bicyclists)
    Samuel, Siby ;
    Knodler, Michael A.
    2018-01-01 | PDF
    Previous studies have demonstrated that young drivers fail to both scan for and mitigate latent hazards, mostly due to their cluelessness. This study investigated whether these skills could be improved by providing young drivers with alerts in advance of an upcoming threat using a driving simulator experiment. A warning was presented on head-up dis ...
  • Evaluating Electrical Resistivity as a Performance Based Test for Utah Bridge Deck Concrete
    Evaluating Electrical Resistivity as a Performance Based Test for Utah Bridge Deck Concrete
    Malakooti, Amir ;
    Maguire, Marc
    2018-01-01 | PDF
    The purpose of this research project was to identify the extent that concrete resistivity measurements (bulk and/or surface) can be used as a performance based lab test to improve the quality of concrete in Utah bridge decks. By allowing UDOT to specify a required resistivity, concrete bridge deck quality will increase and future maintenance costs ...
  • Managing the Impacts of Freight in California
    Managing the Impacts of Freight in California
    Giuliano, Genevieve ;
    Showalter, Catherine
    2018-01-01 | PDF
    With annual gross domestic product (GDP) of more than 2.4 trillion dollars, the State of California plays a major role in the nation’s economic growth and international trade. It is the largest state economy in the US and accounts for about 14% of US GDP. Tons of goods are moved into California every day through its busy seaports, airports and bord ...
  • Street Intersection Characteristics and Their Impacts on Perceived Bicycling Safety
    Street Intersection Characteristics and Their Impacts on Perceived Bicycling Safety
    Akar, Gulsah ;
    Wang, Kailai
    2018-01-01 | PDF
    Safety concern is one of the core issues that deter people from bicycling in the US. Earlier studies have explored the associations between intersection design characteristics and bicyclist safety perceptions. Research shows that there are significant links between bicycling choice, safety perceptions, bicycling experience levels and socio-demograp ...
  • Reducing IncidentInduced Emissions and Energy Use in Transportation Use of Social Media Feeds as an Incident Management Support Tool
    Reducing Incident-Induced Emissions and Energy Use in Transportation: Use of Social Media Feeds as an Incident Management Support Tool
    Yazici, Anil ;
    Kamga, Camille
    2018-01-01 | PDF
    Ubiquitous connected devices and microblogging platforms, such as Twitter, are providing a huge amount user-generated information that has a great potential for applications in transportation incident management (TIM) with minimal infrastructure required. In this study publicly posted Twitter posts were gathered using relevant keywords. While organ ...
  • Interaction of MSE Abutments with Bridge Superstructures under Seismic Loading Shaking Table Tests
    Interaction of MSE Abutments with Bridge Superstructures under Seismic Loading – Shaking Table Tests
    McCartney, John S. ;
    Shing, P Benson
    2018-01-01 | PDF
    This report presents results from shaking table tests on half-scale mechanically-stabilized earth (MSE) bridge abutments. The testing program consists of five tests where the direction of shaking is in the longitudinal direction of the bridge beam, and one test where the direction of shaking is perpendicular to the bridge beam. The longitudinal sha ...
  • Risk Assessment of NonMotorized Access to Rail Transit Stations
    Risk Assessment of Non-Motorized Access to Rail Transit Stations
    Burbidge, Shaunna K.
    2018-01-01 | PDF
    Over the past decade, the agency has undertaken multiple efforts to better understand the various components that contribute to safety for vulnerable road users. One major destination type that attracts a large number of pedestrians and cyclists is transit stations. In fact, all transit riders are pedestrians at some point along their journey, maki ...
  • An Overview of Transportation Data
    An Overview of Transportation Data
    Texas A & M University. Transportation Policy Research Center
    2018-01-01 | PDF
    Transportation data is the foundation for informed policy decision making. Transportation data is collected and managed as an asset. These data provide insight into many different aspects of the transportation system, including: 1. Transportation system assets and their physical condition. 2. Safety, system operation, and performance. 3. Travel beh ...
  • ANNUAL REPORT For Calendar Year 2015 NEW ENGLAND TRANSPORTATION CONSORTIUM
    ANNUAL REPORT For Calendar Year 2015 : NEW ENGLAND TRANSPORTATION CONSORTIUM
    New England Transportation Consortium
    2018-01-01 | PDF
    The New England Transportation Consortium (NETC) is a cooperative effort of the transportation agencies of the six New England States, the six New England state land grant universities and the Federal Highway Administration (FHWA). Through the Consortium, the states pool professional, academic and financial resources for transportation research lea ...
  • Strategic Design for Delivery with Linked Transportation Assets Trucks and Drones tech transfer summary
    Strategic Design for Delivery with Linked Transportation Assets : Trucks and Drones : tech transfer summary
    Campbell, James F. ;
    Sweeney, Donald C.
    2018-01-01 | PDF
    The objectives of this project were to provide a strategic analysis for the design of hybrid truck-drone delivery systems using continuous approximation modeling techniques and to derive general insights into the viability of using drones for home and business delivery as an alternative or complement to traditional truck-only delivery.
  • Introducing the Resilience into the State Transportation Network
    Introducing the Resilience into the State Transportation Network
    Wu, Xiaolong
    2018-01-01 | PDF
    California has been a leader in adopting policies to reduce greenhouse gas emissions. Meanwhile, for too long, businesses have been warning of key routes that are stretched to the breaking point. In many places across California, it takes only a single incident to cause chaos - for instance, a car accident across the intersection of I-5, I-10, and ...
  • Annual Vehicle Miles of Travel [Maryland]
    Maryland. State Highway Administration
    2018-01-01 | PDF
    PDF tables of Maryland VMT from 1980 to 2016.
    Dataset
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