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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 2241 - 2260 of 35888 results
  • Flooding Monitoring and Prediction System Development
    Flooding Monitoring and Prediction System Development
    Refai, Hazem H. ;
    Mousselli, Abdullah
    2022-12-01 | PDF
    The first half of this report details the design of a flooding emulation system to evaluate LiDAR-, radar-, and ultrasonic-based devices for monitoring water level rise and measure water flow speed. The second half of the report describes the incorporation of NOAA data with data collected at ODOT weather station to predict the potential of flooding ...
  • Application of MechanisticEmpirical Pavement Design Approach Into RCC Pavement Thickness Design
    Application of Mechanistic-Empirical Pavement Design Approach Into RCC Pavement Thickness Design
    Wu, Zhong ;
    Mahdi, Moinul I
    2022-12-01 | PDF
    As a durable, economical, and low-maintenance concrete material, roller compacted concrete (RCC) is steadily becoming the preferred choice for many highway pavement applications. However, the current RCC pavement thickness design procedures are solely empirically based, not following the state-of-practice of the mechanistic-empirical (M-E) pavement ...
  • Evaluation of Pavement ME Design Software for Flexible Pavements
    Evaluation of Pavement ME Design Software for Flexible Pavements
    Goehl, Darlene C ;
    Nyamuhokya, Tito
    2022-12-01 | PDF
    This research project is the first step toward Mechanistic-Empirical (ME) Design implementation for flexible pavements in Florida. The Florida Department of Transportation currently uses the American Association of State Highway and Transportation Officials 93 Method for flexible pavement design and is considering changing to the Pavement ME Design ...
  • Transit Facilities in New Hampshire DOT RightsofWay
    Transit Facilities in New Hampshire DOT Rights-of-Way
    Cambridge Systematics, Inc.
    2022-12-01 | PDF
    Public transit providers in New Hampshire have bus stops, transit amenities, and way finding signage within public highway rights-of-way (ROWs), including state-maintained ROWs. The New Hampshire Department of Transportation (NHDOT) lacked a clear policy or process by which a transit provider seeks and gains approval to implement these facilities a ...
  • NHTSA Special Crash Investigations Comprehensive Study of 2019 US Pediatric Vehicular Hyperthermia Fatalities
    NHTSA Special Crash Investigations: Comprehensive Study of 2019 U.S. Pediatric Vehicular Hyperthermia Fatalities
    Wiacek, Christopher J ;
    Firey, Lauren M L
    2022-12-01 | PDF
    Incidents of children dying from heatstroke in vehicles, either because they were left or became trapped, have increased in recent years. Pediatric vehicular heatstroke (PVH), also known as hyperthermia, describes an elevated body temperature that can occur if a child is left in a hot vehicle and may result in fatal injuries. At least 849 children ...
  • Pile Driving Saximeter Application for iOS Android Devices
    Pile Driving Saximeter Application for iOS & Android Devices
    Glennie, Nikolas ;
    Silvey, Alex
    2022-12-01 | PDF
    Currently, field construction inspectors use a E-Saximeter (E-Sax) to determine the hammer fall of single action diesel hammers when driving pile during bridge construction. The hammer fall measurement is required to calculate the bearing capacity of the installed pile. Inspectors record the hammer fall data by hand and the data is entered into an ...
  • PerformanceEngineered Concrete Paving Mixtures
    Performance-Engineered Concrete Paving Mixtures
    Gross, Jerod ;
    Weiss, Jason
    2022-12-01 | PDF
    This Performance-Engineered Concrete Paving Mixtures Transportation Pooled Fund—TPF-5(368)—brought newer concrete pavement technologies to state agencies and assisted states in the adoption of specifications and test methods that will help them deliver on the promise of concrete durability. The Federal Highway Administration (FHWA), 19 state transp ...
  • Comprehensive Analysis on the Conversion of the Existing HOV Lanes into Hot Lanes in Tennessee
    Comprehensive Analysis on the Conversion of the Existing HOV Lanes into Hot Lanes in Tennessee
    Chimba, Deo ;
    Camp, Janey
    2022-12-01 | PDF
    This study analyzed the conversion of HOV Lanes to HOT Lanes in Tennessee. The research applied several approaches including microsimulations of HOV/HOT Lanes that employed data from Greater Nashville Regional Council (GNRC) travel demand model and field collected traffic counts. Microsimulation was conducted through VISUM and VISSIM software by im ...
  • Statewide Implementation of the Surface Performance Graded SPG Specification for Chip Seal Binders in Service Implementation Report
    Statewide Implementation of the Surface Performance Graded (SPG) Specification for Chip Seal Binders in Service: Implementation Report
    Martin, Amy Epps ;
    Arámbula-Mercado, Edith
    2022-12-01 | PDF
    Over the past almost 20 years, a Surface Performance-Graded (SPG) specification for chip seal binders was developed and validated using laboratory measurements and visual field performance of 141 highway sections. This SPG specification was established in an effort to extend the service life of chip seals and save approximately $9 million per year ...
  • Optimizing Laboratory Curing Conditions for Hot Mix Asphalt to Better Simulate Field Behavior
    Optimizing Laboratory Curing Conditions for Hot Mix Asphalt to Better Simulate Field Behavior
    Arras, Benjamin ;
    Sreeram, Anand
    2022-12-01 | PDF
    The engineering properties of asphalt mixtures change with time. Shortly after placement, asphalt concrete (AC) layers are more susceptible to rutting. As the pavement ages, the AC layer becomes stiffer, brittle, and thus more susceptible to cracking. Current protocols provide guidelines for the selection of materials, the determination of the mate ...
  • Deep Learning Models and Tools for Disaster Evacuation and Routing
    Deep Learning Models and Tools for Disaster Evacuation and Routing
    Corns, Steven M ;
    Long, Suzanna K
    2022-12-01 | PDF
    Engineering managers and transportations planners need robust tools to communicate evacuation routing plans following disruptions from earthquake events. The project will use the New Madrid Seismic Zone in South-East Missouri as a testbed for modeling the response to an earthquake and aftershocks at Magnitude 8+. This area was chosen as it allows s ...
  • Potential Applications to Expand the Texas Connected Freight Corridors System
    Potential Applications to Expand the Texas Connected Freight Corridors System
    Wood, Nick ;
    Anderson, Paul R.
    2022-12-01 | PDF
    The Texas Connected Freight Corridors (TCFC) system is a connected vehicle (CV) environment that seeks to improve safety and mobility for the Texas Triangle, which consists of the Austin, Dallas/Fort Worth, Houston, San Antonio, and Laredo metropolitan regions. The TCFC project is a baseline effort to develop and deliver six initial applications fo ...
  • GBeam Bridge Girder Pultrusion Section Design and Optimization
    GBeam Bridge Girder Pultrusion: Section Design and Optimization
    Schanck, Andrew ;
    Davids, William G.
    2022-12-01 | PDF
    The GBeam – a fiber reinforced polymer tub-shaped bridge girder developed by the University of Maine and licensed for manufacture to AIT Bridges– has emerged as a viable replacement for traditional steel and prestressed girders in short to medium span bridges. GBeam manufacture is time and labor intensive, requiring many production steps to be done ...
  • Assessment of Electric Utility Capacity to Deliver Electricity for Electric Aviation at Paine Field and Grant County International Airport
    Assessment of Electric Utility Capacity to Deliver Electricity for Electric Aviation at Paine Field and Grant County International Airport
    Coenen, Steffen ;
    Malarkey, Daniel
    2022-12-01 | PDF
    Advances in battery-powered electric motor systems, lightweight materials, and aircraft design have resulted in the development of new electric aircraft that could gradually replace conventional fuel-powered aircraft for certain use cases in the coming years. In addition, a whole new category of electric vertical takeoff and landing aircraft has se ...
  • Traffic Safety Facts Overview of the 2021 Crash Investigation Sampling System
    Traffic Safety Facts: Overview of the 2021 Crash Investigation Sampling System
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2022-12-01 | PDF
    This research note examines data from the newly modernized Crash Investigation Sampling System (CISS) for 2021. The data shows that there were an estimated 2,698,338 police-reported motor vehicle crashes nationwide where at least one passenger vehicle (i.e., passenger car, light truck or van 10,000 lbs. or less) was towed from the crash scene, whic ...
  • Seismic Monitoring for Asset Management and Prioritization of Transportation Infrastructure
    Seismic Monitoring for Asset Management and Prioritization of Transportation Infrastructure
    Camp, Janey ;
    Croope, Silvana V.
    2022-12-01 | PDF
    During and immediately after a seismic event, information on the condition of the transportation network and individual assets can be limited without deploying personnel for inspection. Damages to bridge and/or overpass approaches could render bridges useless for evacuation and/or response activities. Therefore, employing low-cost sensing to monito ...
  • MultiSpan Lateral Slide Laboratory Investigation Phase II Tech Transfer Summary
    Multi-Span Lateral Slide Laboratory Investigation: Phase II [Tech Transfer Summary]
    Dahlberg, Justin ;
    Phares, Brent
    2022-12-01 | PDF
    The objective of this project was to investigate the performance of the ultrahigh performance concrete (UHPC) closure joint reinforced with noncontact lap-spliced reinforcing steel bar, with a specific focus on determining when a noncontact lap splice has sufficient strength to either open a bridge or expose it to construction loading. In addition, ...
  • Impact of IncentiveDisincentive Specifications on LongTerm Asphalt Pavement Performance
    Impact of Incentive/Disincentive Specifications on Long-Term Asphalt Pavement Performance
    Lee, Hyung S ;
    Nabizadeh, Hadi
    2022-12-01 | PDF
    FDOT’s Percent Within Limits (PWL) specification for acceptance and payment of asphalt materials was first implemented in 2002. The objective of this study was to determine the level of impact that FDOT’s PWL specification has on the long-term performance of asphalt pavements. To meet this objective, Multinomial Logistic Regression Analyses (MLRA) ...
  • Potential Challenges and Research Needs in Reaching 100 Zero Emission Vehicle Sales a Focus on PlugIn Electric Vehicles
    Potential Challenges and Research Needs in Reaching 100% Zero Emission Vehicle Sales- a Focus on Plug-In Electric Vehicles
    Hardman, Scott ;
    Chakraborty, Amrita
    2022-12-01 | PDF
    This project provides a literature review of research on zero emission vehicles (ZEVs) which includes fuel cell vehicles, battery electric vehicles, and plug-on hybrid electric vehicles, the latter are referred to as plug-in electric vehicles (PEV). In the review we focus on PEVs due to a lack of literature on fuel cell vehicles. We consider buyer ...
  • Pavement Repairs in Preparation for a Preventative Maintenance Contract
    Pavement Repairs in Preparation for a Preventative Maintenance Contract
    Goehl, Darlene ;
    Estakhri, Cindy
    2022-12-01 | PDF
    The synthesis study focused on pavement preparatory work performed before preventive maintenance (PM) surfacing contracts with the goal of answering, “What work needs to be performed to the roadway before a new surface is placed?” Preparatory work performed by in-house maintenance forces or maintenance contracts may include crack sealing, fog seal, ...
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