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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 2281 - 2300 of 36873 results
  • Measuring Food Access to Improve Public Health
    Measuring Food Access to Improve Public Health
    Christofa, Eleni ;
    Gonzales, Eric J.
    2023-07-01 | PDF
    Food access is important due to its impact on public health outcomes. A food access metric proposed for four different transportation modes is the square footage of supermarkets that can be reached within 10 minutes travel time walking, biking, driving, and 30 minutes travel time by walk/transit. The spatial analysis is conducted for the centroids ...
  • Intelligent Queue Length Estimation on Ramps Using Computer Vision and Machine Learning Algorithms
    Intelligent Queue Length Estimation on Ramps Using Computer Vision and Machine Learning Algorithms
    Tiwari, Sushant ;
    Rashidi, Abbas
    2023-07-01 | PDF
    Traffic sensors are utilized to capture real-time traffic parameters. Many Departments of Transportation in the United States use inductance loops. Induction loops often fail to give accurate results during highly congested periods, which is the most crucial time for ramp metering operations. Image processing and computer vision may provide an alte ...
  • DashcamEnabled Deep Learning Applications for Airport Runway Pavement Distress Detection
    Dashcam-Enabled Deep Learning Applications for Airport Runway Pavement Distress Detection
    Malekloo, Arman ;
    Liu, Xiaoyue Cathy
    2023-07-01 | PDF
    Pavement distress detection plays a vital role in ensuring the safety and longevity of runway infrastructure. This project presents a comprehensive approach to automate distress detection and geolocation on runway pavement using state-of-the-art deep learning techniques. A Faster R-CNN model is trained to accurately identify and classify various di ...
  • Tapping Into Autonomous Trucking Data An Intelligent Routine Maintenance Framework for Texas
    Tapping Into Autonomous Trucking Data: An Intelligent Routine Maintenance Framework for Texas
    Chin, Kristie ;
    McAuley, Anna
    2023-07-01 | PDF
    Texas has become a major hub for autonomous trucking activity, with companies operating routes daily and continuing to expand operations onto new roadways. Equipped with high-definition cameras and sensor suites, autonomous trucks present a new data opportunity for the Texas Department of Transportation (TxDOT) to improve its routine maintenance op ...
  • Statewide Nonmotorized Traffic Monitoring Study Research Project Capsule 234SS
    Statewide Non-motorized Traffic Monitoring Study: Research Project Capsule [23-4SS]
    Bian, Ruijie "Rebecca" ;
    Rupnow, Tyson
    2023-07-01 | PDF
    The objectives of this research are to: 1. Consolidate non-motorized traffic data collected by LTRC/DOTD to date onto a GIS platform 2. Explore the possibilities of consolidating non-motorized traffic data collected by other public agencies onto the same GIS platform. 3. Refine expansion factors for short-term counters with additional data. 4. Eval ...
  • Behavioral Safety Project
    Behavioral Safety Project
    Guler, S Ilgin ;
    Gayah, Vikash V.
    2023-06-30 | PDF
    Careful data-driven analysis of these key focus areas is needed to provide guidance on the most cost-effective methods to improve safety performance from a behavioral perspective. The objective of this project was to develop a behavioral traffic safety-related data analysis report that identifies behavioral issues that may contribute to crashes and ...
  • Development of Advanced Landslide Investigation Protocol Using Geophysical Methods for Mississippi
    Development of Advanced Landslide Investigation Protocol Using Geophysical Methods for Mississippi
    Khan, Sadik ;
    Amini, Farshad
    2023-06-30 | PDF
    Slope failures frequently occur in highway embankments in Mississippi due to the existence of highly expansive Yazoo Clay. In addition, the Mississippi climate, especially the high volume of precipitation, plays a major role in the development of landslides. State Study 316 was undertaken to evaluate the landslides throughout the states employing A ...
  • Performance of UltraThin Bonded Wearing Course UTBWC During Winter Snow Ice Events in Maryland
    Performance of Ultra-Thin Bonded Wearing Course (UTBWC) During Winter Snow Ice Events in Maryland
    Goulias, Dimitrios ;
    Zhao, Yunpeng
    2023-06-30 | PDF
    Ultra-Thin Bonded Wearing Course (UTBWC) pavement surfacing was developed as a preventative maintenance option to extend pavement life. Despite the successful applications of UTBWC in various states, feedback from winter maintenance crews indicates icing accumulation on some UTBWC surfaces in Maryland during winter storms, and thus current salting ...
  • Investigating Thermal Imaging Technologies and Unmanned Aerial Vehicles to Improve Bridge Inspections
    Investigating Thermal Imaging Technologies and Unmanned Aerial Vehicles to Improve Bridge Inspections
    Ahearn, Kevin ;
    Seston, Brady
    2023-06-30 | PDF
    The overall research objective is to focus on developing UAV-based inspection and analysis protocols using infrared (IR) thermal imaging to determine the existence and extent of concrete delamination, with emphasis on the underside of bridge decks. The research was implemented through 5 tasks: 1. Desk scan of infrared thermal imaging and unmanned a ...
  • Technology of Mapping and NDT for Pipes Inspection
    Technology of Mapping and NDT for Pipes Inspection
    Hamoush, Sameer ;
    Yi, Sun
    2023-06-30 | PDF
    This project aimed to implement the advances in new technologies to develop a robotic-based autonomous inspection system for underground pipelines. The new technology is based on the combination of intelligent powerful portable software and the newly advancement in mapping techniques. The system can scan and reconstruct the 3D profile of a pipeline ...
  • Resiliency of Prestressed Concrete Beams Exposed to Fire
    Resiliency of Prestressed Concrete Beams Exposed to Fire
    Zhu, Zheda ;
    Quiel, Spencer E.
    2023-06-30 | PDF
    Numerical simulations were used to investigate the thermo-structural response of simple span prestressed bulb-T concrete bridge girders to fire hazards located underneath the bridge. The approach consists of three steps: (1) fire modeling, (2) heat transfer modeling, and (3) structural modeling. The effects of thermal concrete spalling are accounte ...
  • Investigating Concrete Deck Cracking in Continuous Steel Bridges
    Investigating Concrete Deck Cracking in Continuous Steel Bridges
    Heymsfield, Ernie. ;
    Murray, Cameron D.
    2023-06-29 | PDF
    Bridge deck cracking reduces serviceability and lifespan of bridges. Early age cracking can typically be attributed to either of two factors: 1) construction practices and 2) concrete shrinkage. The Arkansas Department of Transportation ARDOT has identified a disproportionate number of continuous steel girder bridges experiencing early age bridge d ...
  • Innovation Tools and Concept Strategies for System Planning
    Innovation Tools and Concept Strategies for System Planning
    Chandra, Shailesh ;
    Balali, Vahid
    2023-06-29 | PDF
    Technology awareness, use, and application are required to realistically and accurately model strategies (and their performance measures) that define success in corridor planning. Performance measures derived from each implementable strategy through a project that improves mobility, safety, reliability, sustainability, and equity are helpful to pol ...
  • Balsi Beam Implementation Research
    Balsi Beam Implementation Research
    Ravani, Bahram ;
    Delshad, Saeid
    2023-06-27 | PDF
    The Balsi Beam system was developed by Caltrans as a Mobile Work Zone Protection System for worker protection. The system is integrated as a self-contained tractor trailer system with telescoping beams which can be deployed to a work zone and adjusted in length without a need for a crane or any other equipment. There are, however, no guidelines for ...
  • Implementation and Evaluation of Aira Access Pilot Run in Connecticut
    Implementation and Evaluation of Aira Access Pilot Run in Connecticut
    Shaon, Mohammad Razaur Rahman ;
    Shirani, Niloufar
    2023-06-14 | PDF
    The goal of this project is to implement Aira, one of the fastest-growing assistive technology options for people who are blind or have low vision, across the entire State of Connecticut, to be used for navigation, wayfinding, riding public transportation, and to ensure proper social distancing for blind-low vision (BLV) individuals. The University ...
  • Safety Evaluation of Alternatives for Installing Pedestrian Signals Under Side Street Green Operation
    Safety Evaluation of Alternatives for Installing Pedestrian Signals Under Side Street Green Operation
    Ivan, John N. ;
    Wang, Kai
    2023-06-14 | PDF
    The objective of this project was to carry out a safety evaluation of conversion of intersections owned by CTDOT operating under side street green pedestrian phasing to concurrent pedestrian phasing. Side street green phasing means that pedestrians cross the main road during the minor road green phase, and there is no special pedestrian phasing or ...
  • WestWide Study To Identify Important Highway Locations for Wildlife Crossings
    West-Wide Study To Identify Important Highway Locations for Wildlife Crossings
    Paul, Kylie ;
    Faselt, Jamie
    2023-06-02 | PDF
    Wildlife-vehicle collisions (WVCs), reduced ecological connectivity, and associated impacts to wildlife and humans are widespread problems across road networks, but mitigation measures like wildlife crossings1 that can address those problems are often considered expensive. This effort aims to support transportation agencies, wildlife agencies and o ...
  • Smart Mobility Blueprint for Illinois
    Smart Mobility Blueprint for Illinois
    Jayme, Angeli ;
    Usta, Berkan
    2023-06-01 | PDF
    Connected, automated, shared, and electric (CASE) technologies have invoked Mobility 4.0—a connected, digitized, multimodal, and autonomous system of systems. This project established a flexible and adaptable blueprint that would streamline multidisciplinary and multistakeholder efforts as well as leverage available resources to prepare the Illinoi ...
  • Evaluation of Site Effects Utilizing Cascadia Subduction Zone Ground Motions
    Evaluation of Site Effects Utilizing Cascadia Subduction Zone Ground Motions
    Khosravifar, Arash ;
    Dusicka, Peter
    2023-06-01 | PDF
    The potential Cascadia Subduction Zone (CSZ) megathrust earthquake is recognized as one of the major natural hazards affecting the Pacific Northwest of the United States. The estimation of expected ground-motions is complicated by the long-duration motions from CSZ as well as site effects from deep sedimentary basins in northwest Oregon. This study ...
  • Phase I Before Study Evaluation of Interstate 4 I4 Floridas Regional Advanced Mobility Elements FRAME Project Before Analysis Summary
    Phase I: Before Study Evaluation of Interstate 4 (I-4) Florida’s Regional Advanced Mobility Elements (FRAME) Project (Before Analysis) [Summary]
    Ponnaluri, Raj ;
    Abdel-Aty, Mohamed
    2023-06-01 | PDF
    The best way to find out if a transportation research project was meaningful is to check the numbers. The Florida Department of Transportation is laying the foundation to do that with a massive new undertaking that aims to capture safety and mobility conditions along Interstate 4 (I-4) from Orlando to Tampa.
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