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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 7021 - 7040 of 36104 results
  • Annual Technology Transfer Report FY 2017
    Annual Technology Transfer Report FY 2017
    United States. Dept. of Transportation. Office of the Secretary
    2018-04-01 | PDF
    The U.S. Department of Transportation (U.S. DOT) is the Federal steward of the Nation's transportation system. U.S. DOT consists of multiple modal operating administrations (OAs) that carry out mission-related research, development, and technology (RD&T) programs in support of their goals. U.S. DOT's Technology Transfer (T2) Program, which is house ...
  • Bridge Load Rating
    Bridge Load Rating
    Armendariz, Rafael R. ;
    Bowman, Mark D.
    2018-04-01 | PDF
    The inspection and evaluation of bridges in Indiana is critical to ensure their safety to better serve the citizens of the state. Part of this evaluation includes bridge load rating. Bridge load rating, which is a measure of the safe load capacity of the bridge, is a logical process that is typically conducted by utilizing critical information that ...
  • Capital Program Cost Optimization Through Contract Aggregation Process
    Capital Program Cost Optimization Through Contract Aggregation Process
    Qiao, Julie Yu ;
    Fricker, Jon D.
    2018-04-01 | PDF
    An earlier study (SPR-3702) indicated that INDOT’s practice of grouping (or bundling) projects into multiple-project contracts (MPCs) usually resulted in lower unit costs. This follow-up study (SPR-4156) takes advantage of INDOT’s increased use of project bundling and the data that have been assembled since the conduct of SPR-3702. The principal fi ...
  • Blast Furnace Slag Usage and Guidance for Indiana
    Blast Furnace Slag Usage and Guidance for Indiana
    Wang, Tianqi ;
    Salehi, Maryam
    2018-04-01 | PDF
    The project goal was to better understand the extent of air-cooled blast furnace slag (ACBFS) usage for completed INDOT projects, factors that can influence slag leaching, review remediation strategies, and identify applications where future usage restrictions or sitting criteria are needed. A literature review of government documents, peer-review, ...
  • Annual Report for Calendar Year 2017 New England Transportation Consortium
    Annual Report for Calendar Year 2017: New England Transportation Consortium
    New England Transportation Consortium
    2018-04-01 | 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 l ...
  • Assessing Lower Impulse Load Levels on Reinforced Asphalt Pavement
    Assessing Lower Impulse Load Levels on Reinforced Asphalt Pavement
    Barna, Lynette
    2018-04-01 | PDF
    NHDOT installed fiberglass grid reinforcement systems at several locations in an effort to address pavement deterioration, in particular fatigue and reflective cracking. Previous to this investigation, nondestructive testing using a falling weight deflectometer was performed on six test sections, two control and four sections where fiberglass grid ...
  • Longer Lasting Bridge Deck Overlays
    Longer Lasting Bridge Deck Overlays
    Hunsucker, David Q. ;
    Ashurst, Kean H.
    2018-04-01 | PDF
    The objective of this report is to determine the most effective method for bridge deck overlay construction and repair by assessing current practices; examining new products and technologies; and reviewing NCHRP (National Cooperative Highway Research Program) guidelines, state standard specifications, ASCE (American Society of Civil Engineers) infr ...
  • Pothole Prevention and Innovative Repair
    Pothole Prevention and Innovative Repair
    Marasteanu, Mihai ;
    Ghosh, Debaroti
    2018-04-01 | PDF
    Pothole repairs continue to be a major maintenance problem for many highway agencies. There is a critical need for finding long-lasting, cost-effective materials and construction technologies for repairing potholes. This research effort investigates critical components associated with pothole formation and pothole repair and proposes solutions to r ...
  • Developing Knowledge Management Strategies
    Developing Knowledge Management Strategies
    Gibson, Bryan ;
    Wallace, Candice Y.
    2018-04-01 | PDF
    Retirements and other staff changes have led to a loss of institutional knowledge across public agencies. These changing workforce dynamics have highlighted the study of knowledge management, and how organizations can best retain their core knowledge bases. Key to understanding knowledge management is how organizations have approached the issue and ...
  • Evaluate RiskBased Asset Management Systems Ams BRM Implementation Strategy
    Evaluate Risk-Based Asset Management Systems (Ams) : BRM Implementation Strategy
    Dye Management Group, Inc.
    2018-04-01 | PDF
    The Washington Department of Transportation (WSDOT) engaged Dye Management Group, Inc. (DMG) to evaluate risk-based asset management processes and systems for potential implementation at WSDOT. DMG summarized WSDOT’s existing asset management-related processes, systems, and data in the Current State Report. Taking into consideration WSDOT’s current ...
  • Development of a Field Exposure Site for Predicting and Mitigating ASR
    Development of a Field Exposure Site for Predicting and Mitigating ASR
    Davis, Doddridge E ;
    Deschenes Jr, Richard
    2018-04-01 | PDF
    Alkali-silica reaction (ASR) is an expansive reaction between the alkalis in the cement and reactive silica in the aggregates. Arkansas is currently witnessing the detrimental effects of ASR at various locations in Arkansas. There has been a significant amount of research conducted using accelerated mortar bar tests (ASTM C1260 and AASHTO T303) and ...
  • Integrated Algal FlowWay Digester and Fuel Cell Demonstration Project
    Integrated Algal Flow-Way, Digester, and Fuel Cell Demonstration Project
    Anchor QEA, LLC
    2018-04-01 | PDF
    The U.S. Department of Transportation Maritime Administration (MARAD) and Maryland Department of Transportation Maryland Port Administration (MDOT MPA), through a cooperative agreement, provided funding for the Integrated Algal Flow-Way, Digester, and Fuel Cell Demonstration Project (demonstration project) at Dundalk Marine Terminal (DMT) in Baltim ...
  • Impacts of TransitOriented CompactGrowth on Air Pollutant Concentrations and Exposures in the Tampa Region
    Impacts of Transit-Oriented Compact-Growth on Air Pollutant Concentrations and Exposures in the Tampa Region
    Stuart, Amy L. ;
    Gurram, Sashikanth
    2018-03-31 | PDF
    Amy L. Stuart (ORCID # 0000-0003-1229-493)The objective of this study was to model the potential impacts of alternative transit-oriented urban design scenarios on community exposures to roadway air pollution. We used a modeling framework developed previously for the study area that includes activity-based travel demand modeling (Tampa Bay ABM), a d ...
  • Social Network Effects on Attitudes about Pedestrian Street Crossing Behavior
    Social Network Effects on Attitudes about Pedestrian Street Crossing Behavior
    Ivan, John N. ;
    Ravishanker, Nalini
    2018-03-31 | PDF
    The effectiveness of interventions to improve pedestrian safety, whether involving engineering, education, or enforcement, is limited by the behavior of the public in response to the interventions. It is not difficult to imagine that the behavioral response of an individual to engineering and educational road safety interventions may be at least pa ...
  • Safety Performance Functions for Rural Road Segments and Rural Intersections in Michigan
    Safety Performance Functions for Rural Road Segments and Rural Intersections in Michigan
    Gates, Timothy ;
    Savolainen, Peter
    2018-03-31 | PDF
    This study involved the development of safety performance functions (SPFs) for rural road segments and intersections in the state of Michigan. The facility types included two-lane and four-lane state trunklines (divided and undivided), rural county roadways(paved and gravel), signalized intersections, and minor-road stop controlled intersections. D ...
  • Acceptable Chloride Ion Limit in Concrete
    Acceptable Chloride Ion Limit in Concrete
    Yang, Zhifu ;
    Knight, Marcus
    2018-03-31 | PDF
    The chloride-induced corrosion is one of the main forms of deterioration in the transportation system of Tennessee. The main goal of this research is to determine the critical chloride level that causes de-passivation of both reinforcing and prestressing steel in typical TDOT concrete mixes under various exposure conditions. It was found that steel ...
  • Low Cost Aerial and Spatial Data Transportation Research Synthesis
    Low Cost Aerial and Spatial Data, Transportation Research Synthesis
    Pro-West & Associates, Inc.
    2018-03-31 | PDF
    MnDOT Office of Transportation System Management (OTSM) desires to reduce the cycle time for collecting road data updates from county sources and, opportunistically, capture additional data about road and ancillary uses, e.g. bicycle access. Specifically, this project researched free or low-cost aerial or spatial data from government and other sour ...
  • Railroad Engineering HandsOn Experience
    Railroad Engineering: Hands-On Experience
    McKinney, James L.
    2018-03-31 | PDF
    A STEM outreach program was designed to target local elementary and junior high/middle school students to introduce students to many technical aspects of the railroad industry. A series of railroad operations and associated challenges was presented to the participants. Wooden track pieces and small wooden rail cars were used to design and build a v ...
  • Los Angeles Metro Bus Data Analysis Using GPS Trajectory and Schedule Data
    Los Angeles Metro Bus Data Analysis Using GPS Trajectory and Schedule Data
    Nguyen, Kien ;
    Yang, Jingyun
    2018-03-30 | PDF
    With the widespread installation of location-enabled devices on public transportation, a large amount of bus trajectory data is being generated. Using the location data of the Los Angeles Metro bus system, along with publicly available bus schedule data, a set of data processing and analyses were performed to measure the performance of the public t ...
  • Route Choice in Congested Grid Networks
    Route Choice in Congested Grid Networks
    Gonzales, Eric J.
    2018-03-30 | PDF
    The objective of this research project was to model the traffic performance networks in which travelers have heterogeneous preferences for aspects of their trip. In real networks, drivers make choices of which route to use based on many criteria including the travel time and the variability of travel time. This research project focused on developin ...
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