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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 1881 - 1900 of 36114 results
  • 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 ...
  • 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 ...
  • Open Framework Standards for Combined Aircraft Sensor Network for the State of Ohio to Detect and Track Lower Altitude Aircraft
    Open Framework Standards for Combined Aircraft Sensor Network for the State of Ohio to Detect and Track Lower Altitude Aircraft
    Calhoun, Sean ;
    Adami, Tony
    2023-07-01 | PDF
    As research, development and overall investment continues to accelerate the integration of Uncrewed Aircraft Systems (UAS or drones) into our skies, it is becoming ever more critical to develop supporting systems and services that are based on sound engineering and strategic planning. Reliable and robust airspace surveillance for the lower altitude ...
  • Investigating Consistency Among Bridge Inspectors Using Simulated Virtual Reality Testbed
    Investigating Consistency Among Bridge Inspectors Using Simulated Virtual Reality Testbed
    Jahanshahi, Mohammad ;
    Dyke, Shirley J.
    2023-07-01 | PDF
    The current condition of US infrastructure requires a data-driven, risk-based approach to asset management. In the case of bridges, inspectors in every state visit these structures and collect data, and based on the information they report, state departments evaluate bridge conditions, predict deterioration, and make repair and retrofit decisions. ...
  • Adaption of Drone Measurement Techniques to Roundabouts and Innovative Intersections
    Adaption of Drone Measurement Techniques to Roundabouts and Innovative Intersections
    Rodgers, Michael O. ;
    Wei, Anqi
    2023-07-01 | PDF
    With the advancement in drone data collection and computer-vision techniques, both inexpensive high-resolution video drones and commercial services that offer automatic drone video analysis have become accessible to most transportation agencies. Despite the great potential of using drone video data for the collection of traffic operational and safe ...
  • Cold InPlace Recycling Project Selection and Guidance for Iowa Roadways Tech Transfer Summary
    Cold In-Place Recycling Project Selection and Guidance for Iowa Roadways [Tech Transfer Summary]
    Jahren, Chuck ;
    Lee, Hosin David
    2023-07-01 | PDF
    Cold in-place recycling (CIR) involves cold milling 3 to 4 in. of a deteriorated asphalt pavement, processing and stabilizing the millings, and relaying, compacting, curing, and covering with a hot-mix asphalt (HMA) overlay or (rarely in Iowa) a bituminous surface treatment. This report documents an investigation of CIR projects in Iowa with the ob ...
  • Effectiveness of Nonpharmaceutical Interventions to Avert the Second COVID19 Surge in Los Angeles County A Simulation Study
    Effectiveness of Nonpharmaceutical Interventions to Avert the Second COVID-19 Surge in Los Angeles County: A Simulation Study
    Rodier, Caroline ;
    Horn, Abigail
    2023-07-01 | PDF
    This study used a simulation to examine nonpharmaceutical interventions (NPIs) that could have been implemented early in a COVID-19 surge to avoid a large wave of infections, deaths, and an overwhelmed hospital system. The authors integrated a dynamic agent-based travel model with an infection dynamic model. Both models were developed with and cali ...
  • One California Deployment Support
    One California Deployment Support
    Zhou, Kun ;
    Vu, Alexander
    2023-07-01 | PDF
    The One California team is supported by its academic partners at UC Berkeley PATH and UC Riverside CE-CERT. One California seeks to spur innovation, promote economic vitality, and protect precious natural resources through early adoption of CV systems and applications. Specifically, the One California team intends to improve traveler safety, mobili ...
  • 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 ...
  • Transitioning from Written to Online Interactive Reports A Guide for Creating Modern Reports
    Transitioning from Written to Online Interactive Reports: A Guide for Creating Modern Reports
    Lasley, Phil ;
    Gick, Brittney
    2023-07-01 | PDF
    Interactive reports provide several benefits to readers, including making them easier to read, understand, and access. Interactive reports can also provide report analytics that can allow authors to understand how frequently the public use their reports. This guide sought to identify and document the methods, best practices, and guidance on develop ...
  • Impacts of Autonomous Vehicles on Minnesota Roads Technical Summary
    Impacts of Autonomous Vehicles on Minnesota Roads [Technical Summary]
    Rajamani, Rajesh ;
    Lund, Victor
    2023-07-01 | PDF
    This project focuses on experimental tests of the performance characteristics of autonomous vehicles (AVs) on highways and local roads in Minnesota. The project provides detailed data characterizing AV performance, which in turn can be used to inform the transportation community on implications for infrastructure maintenance, winter road maintenanc ...
  • Traffic Safety Facts 2021 Data Speeding
    Traffic Safety Facts 2021 Data: Speeding
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2023-07-01 | PDF
    Twenty-eight percent of fatal crashes, 13 percent of injury crashes, and 9 percent of property-damage-only crashes in 2021 were speeding-related traffic crashes. In 2021 there were 12,330 fatalities in speeding-related crashes, 29 percent of total traffic fatalities for the year and an increase of 8 percent from 11,428 in 2020, the highest since 20 ...
  • Bees and Butterflies in Roadside Habitats Identifying Patterns Protecting Monarchs and Informing Management
    Bees and Butterflies in Roadside Habitats: Identifying Patterns, Protecting Monarchs, and Informing Management
    Meinzen, Thomas C ;
    Debinski, Diane M
    2023-07-01 | PDF
    Pollinating insects provide vital ecosystem services and are facing global declines and habitat loss. Roadsides are increasingly regarded as important potential areas for enhancing pollinator habitat. Understanding which roadsides best support pollinators—and why—is essential to helping locate and prioritize pollinator conservation efforts across r ...
  • Project Selection Guidance for Cold InPlace Recycled Pavements Brief
    Project Selection Guidance for Cold In-Place Recycled Pavements [Brief]
    Jahren, Charles ;
    Lee, Hosin David
    2023-07-01 | PDF
    Proper project selection is an important step in ensuring the success of a cold in-place recycling (CIR) project. As of 2023, CIR has been successfully used in Iowa for more than 30 years. However, it is important to first decide whether CIR is the correct solution for a given pavement project because of its limited effectiveness on roads with heav ...
  • Exploring PerformanceBased Contracts A Good Option to Address LongTerm Road Maintenance in California Research Brief
    Exploring Performance-Based Contracts: A Good Option to Address Long-Term Road Maintenance in California? [Research Brief]
    Calahorra-Jimenez, Maria ;
    Poythress, Richard
    2023-07-01 | PDF
    The 2019 Report Card for California’s infrastructure indicates that California has the second worst roads in the country: “(55%) of the major urban roads in California are in poor condition.” This report indicates that S.B. (1)— which aims to “fix neighborhood streets, freeways, and bridges in communities across California” provides the revenue nee ...
  • Understanding Mobility Needs for Older Adults in Wisconsin
    Understanding Mobility Needs for Older Adults in Wisconsin
    Schrader, Michael ;
    Han, Dahai
    2023-07-01 | PDF
    The Wisconsin Department of Health Services predicts a 72% increase in the population aged 65 and older in the state by 2040, indicating a growing demand for alternative transportation services. To address this need and support healthy aging, this research project was conducted to gather data on the travel patterns, challenges, and recommendations ...
  • Mitigation of ChlorideInduced Corrosion through Chemisorption
    Mitigation of Chloride-Induced Corrosion through Chemisorption
    Yellavajjala, Ravi Kiran ;
    Sajid, Hizb Ullah
    2023-07-01 | PDF
    Salt brine deicing solution contains chloride ions that can penetrate the passive layer and cause corrosion in rebars. While epoxy coatings are effective, they can be easily damaged during transportation and construction. In addition, aggressive localized corrosion is observed in damaged epoxy coated rebars. To address this issue, this project aims ...
    Supporting Files
  • 2023 Research Peer Exchange Transportation Pooled Funds Data Curation and Promoting Research Culture
    2023 Research Peer Exchange: Transportation Pooled Funds, Data Curation, and Promoting Research Culture
    Range, Jeffrey ;
    Hickey, Laura
    2023-07-01 | PDF
    Colorado Department of Transportation (CDOT) hosted a two-day Peer Exchange at the CDOT headquarters in Denver, Colorado on February 28 and March 1, 2023. Representatives from Colorado, Idaho, Missouri, Maryland, Vermont, Federal Highway Administration, and the National Transportation Library participated. This peer exchange focused on the discussi ...
  • 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 ...
  • Cold InPlace Recycling Project Selection and Guidance for Iowa Roadways
    Cold In-Place Recycling Project Selection and Guidance for Iowa Roadways
    Buss, Ashley ;
    Pinto, Irvin
    2023-07-01 | PDF
    Analysis of 44 CIR pavement projects from the Iowa Pavement Management Information System database showed that rutting was the distress that triggered performance concerns first, followed by longitudinal wheel path cracking and transverse cracking. Pavement distress indices typically dropped below trigger values 10 to 15 years after CIR rehabilitat ...
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