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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 2981 - 3000 of 35959 results
  • Structural Retrofit of Corroded Metal Culverts using GFRP SLIP Liner Phase II
    Structural Retrofit of Corroded Metal Culverts using GFRP SLIP Liner. Phase II
    Taha, Mahmoud Reda ;
    Murcia, Daniel Heras
    2021-12-31 | PDF
    Metal culverts have served as a common structural element in highway design since the mid-1950s because of their low initial cost, ease of fabrication, and simple construction method. There has been an epidemic of corrosion of metal culverts for the last decade. Such corrosion results in loss of cross-section and occasionally leads to structural fa ...
  • Improving Safety at HighwayRail Grade Crossings in Florida While Maintaining Continuity of Passenger and Freight Flows A MultiObjective Approach
    Improving Safety at Highway-Rail Grade Crossings in Florida While Maintaining Continuity of Passenger and Freight Flows: A Multi-Objective Approach
    Dulebenets, Maxim A. ;
    Pasha, Junayed
    2021-12-31 | PDF
    The State of Florida is one of the most populous states in the United States. Because of this increasing population, a substantial amount of freight is transported in Florida. Rail is an important mode of freight transportation in Florida. Increasing railroad transportation-based activities have led to greater economic impacts as well as more highw ...
  • Improving SCDOT Project Delivery Through Identifying Potentially Suitable Locations for Mitigation and Standardizing Section 401404 Permit Application Process
    Improving SCDOT Project Delivery Through Identifying Potentially Suitable Locations for Mitigation and Standardizing Section 401/404 Permit Application Process
    Huynh, Nathan ;
    Goharian, Erfan
    2021-12-31 | PDF
    The South Carolina Department of Transportation (SCDOT) identified three areas that have significant effect on its ability to deliver projects on time and on budget: 1) inconsistent permit application submittals among consultants that led to delay in approval by the U.S. Army Corp of Engineers (USACE), 2) inability to consistently identify “red fla ...
  • Capitalizing on Construction Records to Identify Relationships between Construction and Longterm Project Performance Project Summary
    Capitalizing on Construction Records to Identify Relationships between Construction and Long-term Project Performance [Project Summary]
    Texas Department of Transportation. Research and Technology Implementation Office
    2021-12-31 | PDF
    Study of the effect of materials properties on the long-term pavement performance requires significant amount of time and extensive resources as pavement performance needs to be measured and documented on a regular basis for years.
  • Evaluation of Surface Mounted Median Guardrail Project Summary
    Evaluation of Surface Mounted Median Guardrail [Project Summary]
    Bligh, Roger P.
    2021-12-31 | PDF
    Median barriers are commonly used in areas that have high average daily traffic or where there is a higher chance of a vehicle intruding into opposing lanes due to curves or other geometric features. Most median barriers are concrete barriers, which are generally expensive to construct. A metal-rail median guardrail has the potential to reduce cons ...
  • Towards Efficient Prediction of Highway Friction on an Annual Basis on the Texas Network Project Summary
    Towards Efficient Prediction of Highway Friction on an Annual Basis on the Texas Network [Project Summary]
    Prozzi, Jorge ;
    Sabillon, Christian
    2021-12-31 | PDF
    The researchers conducted a thorough analysis of texture, its effects on pavement friction, and the different testing methods to measure it. The basic principles that govern roadway friction, the main friction-generating mechanisms, and the different equipment used to measure pavement friction were also thoroughly investigated. Finally, they summar ...
  • Innovative Contracting Risk Management Best Practices and Guidance Documents
    Innovative Contracting Risk Management Best Practices and Guidance Documents
    Keetley, Andrew R ;
    Goldstein, Glenn
    2021-12-20 | PDF
    The Michigan Department of Transportation (MDOT) has been successfully applying risk management on innovative contracting methods and was looking to formalize and build upon its current risk management guidance. Research was conducted to document industry risk management best practices to provide recommendations for developing and implementing a co ...
  • Annual Technology Transfer Report FY 2020
    Annual Technology Transfer Report FY 2020
    United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
    2021-12-16 | PDF
    Every year, the Department of Commerce (DOC) submits a Federal Laboratory T2 Fiscal Year Summary Report to the President and the Congress in accordance with 15 U.S.C. 3710(g)(2). The report summarizes the implementation of technology transfer authorities established by the Technology Transfer Commercialization Act of 2000 (Pub. L. 106-404) and othe ...
  • BikewaySim Technology Transfer: City of Atlanta, Georgia [supporting datasets]
    Passmore, Reid ;
    Watkins, Kari
    2021-12-02 | ZIP
    These are the scripts used in the National Center for Sustainable Transportation research report titled, BikewaySim Technology Transfer: City of Atlanta, Georgia. Note that these scripts may not be the latest version. Please use the latest of these scripts published in the following GitHub repository: https://github.com/gti-gatech/BikewaySim.
    Dataset Supporting Files
  • LongRange Urban Air Mobility LandUse Planning for Vertiports
    Long-Range Urban Air Mobility Land-Use Planning for Vertiports
    Hall, Katelynn ;
    Hillyard, Tayli
    2021-12-01 | PDF
    Urban Air Mobility (UAM) is a rapidly developing industry that highlights tremendous growth opportunities and a major shift in the delivery mode of services and products. This project focuses on a vital step towards the integration of UAM: the siting of vertiports based on their impact on the surrounding community. The identification of potentially ...
  • Evaluating Erosion Control Blankets Made With Waste Wool Along Southeastern Idaho Roads
    Evaluating Erosion Control Blankets Made With Waste Wool Along Southeastern Idaho Roads
    Ament, Rob ;
    Bell, Matthew
    2021-12-01 | PDF
    This project sought to determine whether erosion control blankets (ECBs) using wool instead of coir (coconut fibers) on two different roadside cut slope restoration projects in southern Idaho increased seeded native species establishment in cheatgrass dominated sites. By the second growing season, results for some wool ECBs showed great promise in ...
  • Transformation of Engineering Tools To Increase Material Efficiency of Concrete
    Transformation of Engineering Tools To Increase Material Efficiency of Concrete
    Watanabe, Sonoko Ichimaru ;
    Kamau-Devers, Kanotha
    2021-12-01 | PDF
    This report demonstrates how considerations across concrete material design and infrastructure design can be used together to change environmental impacts and costs by targeting appropriate constituents, materials, and system longevity. In this early stage exploration, methods to compare concrete mixtures proportioning as they relate to environment ...
  • Best Practices for Performance Measurement in Transportation Operations and Maintenance
    Best Practices for Performance Measurement in Transportation Operations and Maintenance
    Gibson, Bryan ;
    Catchings, Rachel
    2021-12-01 | PDF
    Public agencies benefit from measuring their performance as it helps to focus employee and organizational activities. State departments of transportation have become more performance-oriented over the past two decades and routinely collect data on highway safety, infrastructure condition, system operations, project delivery, winter maintenance, tra ...
  • Florida Slab Beam Bridge With UltraHigh Performance Concrete Joint Connections
    Florida Slab Beam Bridge With Ultra-High Performance Concrete Joint Connections
    Chitty, Francisco ;
    Garber, David
    2021-12-01 | PDF
    The Florida Slab Beam (FSB) is a precast, prestressed, flat-slab beam currently used for off-system, short-span bridges (less than about 65 feet) by the Florida Department of Transportation (FDOT). A modified FSB section and female-to-female joint detail utilizing ultra-high-performance concrete (UHPC) were explored to accelerate construction and i ...
  • Optimizing Work Zone Zipper Merge Using Federated Driving Simulators
    Optimizing Work Zone Zipper Merge Using Federated Driving Simulators
    Sun, Carlos ;
    Edara, Praveen
    2021-12-01 | PDF
    Several Departments of Transportation have implemented the zipper merge to counter the issues of wasted capacity and queue jumping that surface at early merge work zones. This project researched four issues related to zipper merge operations and offered practical suggestions for the deployment of zipper merge. A main result is that public education ...
  • BikewaySim Technology Transfer City of Atlanta Georgia
    BikewaySim Technology Transfer: City of Atlanta, Georgia
    Passmore, Reid ;
    Watkins, Kari
    2021-12-01 | PDF
    Bicycle transportation is often excluded from travel demand and route choice models. Even when bicycle modes are incorporated, models may use a simplified network that does not contain all streets and bicycle paths that a cyclist could feasibly take. These models may also only use trip distance and travel time when modelling a cycling trip; researc ...
  • SolarPowered Automated Transportation Feasibility and Visualization
    Solar-Powered Automated Transportation: Feasibility and Visualization
    Furman, Burford ;
    Ramasubramanian, Laxmi
    2021-12-01 | PDF
    A solar-powered automated transportation network (ATN) connecting the North and South campuses of San José State University with three passenger stations was designed, visualized, and analyzed in terms of its energy usage, carbon offset, and cost. The study’s methodology included the use of tools and software such as ArcGIS, SketchUp, Infraworks, S ...
  • Evaluation of Winter Maintenance with Salt Brine Applications in Wisconsin
    Evaluation of Winter Maintenance with Salt Brine Applications in Wisconsin
    Claros, Boris ;
    Chitturi, Madhav
    2021-12-01 | PDF
    Salt has been traditionally used in winter roadway maintenance. Due to driver expectations and level of service, use of salt and cost have significantly increased over the years. Transportation agencies have been introducing responsible and sustainable winter maintenance practices to alleviate impacts on the environment, human health, vehicles, inf ...
  • Identify and Analyze Inundated Bridge Superstructures in High Velocity Flood Events Final Report
    Identify and Analyze Inundated Bridge Superstructures in High Velocity Flood Events: Final Report
    Ahmari, Habib ;
    Hummel, Michelle
    2021-12-01 | PDF
    Flood events are reported as the most frequent cause of bridge failure in the United States. Current design guidelines and standards specify the use of 100-year flood for analyzing the overtopping of bridges. Still, many bridge failures in the U.S. occur during floods with return periods smaller than 100 years. These guidelines only address hydrody ...
  • Developing Countermeasures to Decrease Pedestrian Deaths [Supporting Dataset]
    Kockelman, Kara M. ;
    Perrine, Kenneth A.
    2021-12-01 | ZIP
    In efforts to reverse the rising rate of pedestrian-related crashes in Texas, researchers analyze crash data to determine common causes and effective countermeasures. Extensive use of visualizations, regression models, advanced tree-based analysis, and geographic information system (GIS)-based data management adds insight. Significant variables inc ...
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