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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 5761 - 5780 of 36054 results
  • Behavior and Repair of Corroded Steel HPiles Phase I Axial Behavior
    Behavior and Repair of Corroded Steel H-Piles Phase I (Axial Behavior)
    Abdulazeez, Mohanad M ;
    Ramadan, Amro
    2019-05-01 | PDF
    This report summarizes the details of an experimental work and finite element modeling that were conducted to evaluate: 1) the remaining axial capacity of steel H-piles having different corrosion severity and extension levels, and 2) the performance of repaired corroded steel H-piles. The research consisted of 32 short steel H-piles (10 × 42) encas ...
  • Improving the PerformanceGraded Asphalt Binder Specification Final Report
    Improving the Performance-Graded Asphalt Binder Specification: Final Report
    Hajj, Ramez ;
    Filonzi, Angelo
    2019-05-01 | PDF
    The Performance Grading (PG) specification is currently used as the primary purchase specification and binder classification system in the state of Texas and many other parts of the world. Since its inception, binder production has evolved to include new technologies and additives that can be used to improve binder performance. However, in some cas ...
  • How and Where Should I Ride This Thing? “Rules Of the Road” for Personal Transportation Devices [supporting datasets]
    Fang, Kevin ;
    Agrawal, Asha Weinstein
    2019-05-01 | ZIP
    In recent years, “Personal Transportation Devices” (PTDs) have exploded onto streets and sidewalks. These small devices transport individual persons at slow speeds and are either human-powered or motorized. Examples include electric (kick) scooters, skateboards, e-skateboards, roller blades, and Segways. One key to successfully integrating PTDs int ...
    Dataset
  • Viability of Vehicle Length in Estimating Vehicle Classification and Axle Factors Final Report Phase II
    Viability of Vehicle Length in Estimating Vehicle Classification and Axle Factors: Final Report- Phase II
    Gibbs, Lee ;
    Minge, Erik D.
    2019-05-01 | PDF
    The primary objectives of this project are to understand the accuracy of axle factors determined from vehicle length and to develop and evaluate methods for converting length data to axle-based classifications. Phase I of project TPF 5(340) assessed alternative methods to estimate axle factors and vehicle class from length-based data. The two best ...
  • Highway Safety Manual Part D Validation and Application in Wyoming
    Highway Safety Manual Part D: Validation and Application in Wyoming
    Ahmed, Mohamed M ;
    Gaweesh, Sherif
    2019-05-01 | PDF
    This study is considered a first step toward validating applicability of the Highway Safety Manual (HSM) Part D to Wyoming conditions. The HSM Part D provides a quantitative measure of safety for various countermeasures known as crash modification factors (CMF). These CMFs are provided for four distinct groups of treatments: roadway segments (e.g., ...
  • Evaluate New Equipment or Technology Available for Roadside Fleet Repair
    Evaluate New Equipment or Technology Available for Roadside Fleet Repair
    Khoury, Issam ;
    Jordan, Josh
    2019-05-01 | PDF
    ODOT’s Pickaway County Garage in Circleville is centrally located and equipped with a mechanic’s truck available to travel to locations where equipment breaks down and make minor repairs on site. However, anything more serious, such as a tire change, requires a service call to a commercial vehicle towing service, which are located outside the count ...
  • Strength Assessment of Older Continuous Slab and TBeam Reinforced Concrete Bridges
    Strength Assessment of Older Continuous Slab and T-Beam Reinforced Concrete Bridges
    Seok, Seungwook ;
    Ravazdezh, Faezeh
    2019-05-01 | PDF
    This report investigates a new methodology for load rating of older reinforced concrete (RC) flat-slab and T-beam bridges in Indiana, using the tools of 3D finite element analysis. The Conventional Load Rating (CLR) method currently in use by INDOT relies on a simplified 2D analysis based on beam theory that may underestimate bridge capacity. Since ...
  • Impact of Inundation on Roadway Pavements Case Study LA 493 Tech Summary
    Impact of Inundation on Roadway Pavements: Case Study – LA 493 [Tech Summary]
    Gaspard, Kevin ;
    Zhang, Zhongjie
    2019-05-01 | PDF
    According to the National Oceanic and Atmospheric Administration (NOAA), there have been 233 weather and climatic disasters exceeding $1 billion per event in the US between 1980 and 2018. It is estimated that the total costs of these events exceeds $1.5 trillion. As of April 30, 2018, the Federal Emergency Management Administration (FEMA) has repor ...
  • Developing Material Specification and Application Criteria for Sealing Concrete Bridge Decks
    Developing Material Specification and Application Criteria for Sealing Concrete Bridge Decks
    Wells, Danny ;
    Palle, Sudhir
    2019-05-01 | PDF
    The Kentucky Transportation Cabinet (KYTC) has more aggressively pursued preventive maintenance in recent years. Sealing concrete bridge decks is one preventive maintenance activity the Cabinet has actively pursued. KYTC’s Divisions of Maintenance and Structural Design requested assistance from researchers at the Kentucky Transportation Center (KTC ...
  • Emergency Medical Services in American Indian Reservations and Communities Results of a National Survey
    Emergency Medical Services in American Indian Reservations and Communities: Results of a National Survey
    Quick, Kathryn ;
    Dufour, Sara
    2019-05-01 | PDF
    The focus of this exploratory study is emergency medical response (EMS) for motor vehicle crashes (MVCs) in American Indian reservations and communities. Tribal transportation professionals have raised questions about the role of EMS in the high MVC fatality rate – 656 annually – in these areas. We conducted a national survey (n=189) of tribal gove ...
  • Preparing Local Agencies for the Future of Connected and Autonomous Vehicles
    Preparing Local Agencies for the Future of Connected and Autonomous Vehicles
    Hallmark, Shauna ;
    Veneziano, David
    2019-05-01 | PDF
    This toolbox was developed to provide a summary of information that local agencies should be aware of to prepare for connected and autonomous vehicles (CAVs). The main goal of this toolbox is to assist local agencies in preparing for CAVs in the short term—5 to 10 years. Since local agencies are not generally expected to have the resources to becom ...
  • Energy Efficient Transportation Modeling
    Energy Efficient Transportation Modeling
    Ghanem, Ahmed ;
    Wang, Jinghui
    2019-05-01 | PDF
    As concerns about climate change increase, so do calls for reductions in the use of fossil fuels and a shift to more sustainable and less-polluting transportation modes. Cities and urban areas are generally more concerned about these issues because their population comprises over half of the world’s population. Roadway congestion levels began to ri ...
  • Understanding Law Enforcement Attitudes and Beliefs about Traffic Safety
    Understanding Law Enforcement Attitudes and Beliefs about Traffic Safety
    Otto, Jay ;
    Finley, Kari
    2019-05-01 | PDF
    The goal of this project was to understand how the culture within law enforcement agencies impacts engagement in traffic safety enforcement. The four objectives were to understand: (1) how law enforcement leaders and officers prioritize traffic safety relative to other public safety issues; (2) self-reported attitudes, beliefs, and behaviors about ...
  • How and Where Should I Ride This Thing Rules Of the Road for Personal Transportation Devices
    How and Where Should I Ride This Thing? “Rules Of the Road” for Personal Transportation Devices
    Fang, Kevin ;
    Agrawal, Asha Weinstein
    2019-05-01 | PDF
    In recent years, “Personal Transportation Devices” (PTDs) have exploded onto streets and sidewalks. These small devices transport individual persons at slow speeds and are either human-powered or motorized. Examples include electric (kick) scooters, skateboards, e-skateboards, roller blades, and Segways. One key to successfully integrating PTDs int ...
  • HumanFIRST Driving Simulation Educational Development
    HumanFIRST Driving Simulation Educational Development
    Morris, Nichole L. ;
    Craig, Curtis M.
    2019-05-01 | PDF
    The HumanFIRST Laboratory was recently awarded a grant through the University of Minnesota Office of the Vice President for Research to match funds to completely overhaul the laboratory’s driving simulators. This upgrade, which includes large touchscreen displays in the immersive simulators’ cockpit, will allow the laboratory to conduct innovative ...
  • Removing Nitrate from Stormwater with Biochar Amendment to Roadway Soils
    Removing Nitrate from Stormwater with Biochar Amendment to Roadway Soils
    Imhoff, Paul T. ;
    Culver, Teresa B.
    2019-05-01 | PDF
    A combination of field and laboratory studies evaluated the impact of amending a wood-derived biochar to a roadway soil on stormwater runoff and water quality. At the field site, biochar amendment continued to demonstrate significant reductions in peak stormwater flow and cumulative runoff volume three years after construction. More limited water q ...
  • Evaluation of Hpile Corrosion Rates for WI Bridges Located in Aggressive Subsurface Environments
    Evaluation of H-pile Corrosion Rates for WI Bridges Located in Aggressive Subsurface Environments
    Poursaee, Amir ;
    Rangaraju, Prasad
    2019-05-01 | PDF
    On September 25, 2013, Pier 22 for the Leo Frigo Bridge (B-05-381) near Green Bay, Wisconsin, moved vertically approximately two feet. One of the root causes of the vertical movement was the reduced structural capacity due to the loss of section of the steel H-piles that supported the pier as a result of severe corrosion. The purpose of this resear ...
  • Investigation of Variations in Corrosion Potential in Mechanically Stabilized Earth Backfill Due to Migration of Fines
    Investigation of Variations in Corrosion Potential in Mechanically Stabilized Earth Backfill Due to Migration of Fines
    Parsons, Robert L. ;
    Han, Jie
    2019-05-01 | PDF
    Departments of Transportation have constructed thousands of mechanically stabilized earth (MSE) walls to support bridge abutments in highway projects and for other applications. These MSE walls often include metal strips or grids as reinforcement, typically galvanized steel strips within granular backfill meeting Federal Highway Administration (FHW ...
  • Susceptibility of Bridge Steel and Concrete Components to Microbiological Influenced Corrosion MIC and Microbiological Influenced Deterioration MID in Florida
    Susceptibility of Bridge Steel and Concrete Components to Microbiological Influenced Corrosion (MIC) and Microbiological Influenced Deterioration (MID) in Florida
    Permeh, Samanbar ;
    Boan, Mayrén Echeverría
    2019-05-01 | PDF
    Submerged steel piles had localized corrosion associated with microbiologically influenced corrosion (MIC). The site also had heavy marine growth. The effect of crevice environments created by the macrofoulers may support MIC. Also, concrete may be subject to deterioration by microbiologically influenced deterioration (MID). Field visits to Florida ...
  • Predicting the Impact of Changing Speed Limits on Traffic Safety and Mobility on Indiana Freeways
    Predicting the Impact of Changing Speed Limits on Traffic Safety and Mobility on Indiana Freeways
    Tarko, Andrew P. ;
    Pineda-Mendez, Raul
    2019-05-01 | PDF
    After repeal of the National Maximum Speed Limit Law, states were allowed to set individual speed limits on their interstate roads. Several states opted for a uniform speed limit while others implemented differential speed limits. The current speed limit on Indiana rural freeways limits speed of passenger cars to 70 mph and restricts to 65 mph spee ...
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