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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 3641 - 3660 of 36908 results
  • Exploring the Relationship Between Mandatory Helmet Use Regulations and Adult Cyclists Behavior in California Using Hybrid Machine Learning Models
    Exploring the Relationship Between Mandatory Helmet Use Regulations and Adult Cyclists' Behavior in California Using Hybrid Machine Learning Models
    Kakhki, Fatemeh Davoudi ;
    Chierichetti, Maria
    2021-10-01 | PDF
    In 2019, the National Transportation Safety Board recommended the introduction of all-ages helmet law, to reduce fatalities involving cyclists. Even though the benefits of wearing helmets in protecting cyclists against trauma in cycling crashes has been documented, the use of helmets is still limited, and there is opposition against mandatory helme ...
  • WisDOT Research Program Annual 2021 Report
    WisDOT Research Program Annual 2021 Report
    Wisconsin Department of Transportation. Research and Library Unit
    2021-09-30 | PDF
    The Wisconsin Department of Transportation (WisDOT) managed a $4.34 million program for research and technology transfer services during federal fiscal year (FFY) 2021. The State Planning and Research Part B (SPR-B) federal program funded 91 percent ($3.96 million) of the program, while state funds covered the remaining nine percent ($0.38 million) ...
  • Improving Immersive Highly Realistic InLab Cycling Experiences for Analyzing Active Travel
    Improving Immersive, Highly Realistic In-Lab, Cycling Experiences for Analyzing Active Travel
    Daziano, Ricardo A ;
    Yoon, So-Yeon
    2021-09-30 | PDF
    In recent years, the continuous growth of private cars, the tight supply of land resources and the continuous poor air conditions have led policy makers to advocate sustainable public transportation. Bike sharing system has been introduced by many cities and developed worldwide rapidly, due to its advantages in reducing environmental pollution and ...
  • Advancing the Behavioral Safety Analytic Tools Capabilities of the Connecticut Department of Transportation
    Advancing the Behavioral Safety Analytic Tools Capabilities of the Connecticut Department of Transportation
    Wang, Kai ;
    Shaon, Mohammad Razaur Rahman
    2021-09-30 | PDF
    The main objectives of this project are to develop crash prediction models for driver behavior related crashes and to develop a web application tool to be used by practitioners for performing hot spot identification and selecting effective countermeasures to mitigate crashes related to different types of driver behaviors. Other than the traditional ...
  • EntryLevel Driver Training CDL for Maintenance Equipment Operators
    Entry-Level Driver Training (CDL) for Maintenance Equipment Operators
    Camden, Matthew C. ;
    Tidwell, Scott
    2021-09-30 | PDF
    Training regulation goes into effect on February 7, 2022. The goals of this project were to (1) provide training materials and resources that will allow Clear Roads member agencies to provide entry-level commercial driver’s license training that complies with 81 FR 88732, 84 FR 8029, and 49 CFR 380; and (2) develop and document a process for member ...
  • A Statewide Geographic Information System GIS as a Predictive Tool for Locating Deeply Buried Archeological Deposits in Nebraska Phase II
    A Statewide Geographic Information System (GIS) as a Predictive Tool for Locating Deeply Buried Archeological Deposits in Nebraska: Phase II
    Layzell, Anthony L ;
    Mandell, Rolfe D
    2021-09-30 | PDF
    This project developed a GIS to assist with the identification of deeply buried archeological sites in alluvial settings across Nebraska with the exception of the Sandhills region. Soil survey data, previous geoarcheological investigations, landform position, and other information was used to rank the potential of any stream valley setting as low, ...
  • Developing a Plan To Restore and Enhance Native Habitats for Pollinators Along Tennessees Interstate and Highway Systems
    Developing a Plan To Restore and Enhance Native Habitats for Pollinators Along Tennessee’s Interstate and Highway Systems
    Breeden, Cooper ;
    Estes, Dwayne
    2021-09-30 | PDF
    Tennessee once contained millions acres of grasslands. These ecosystems occurred in all ecoregions of the state. Unfortunately, most of the state’s grasslands have declined by greater than 90 percent, and some types have experienced losses exceeding 99.9 percent. The remnants that still exist now persist only in powerline corridors or along roadsid ...
  • Public Health Effects of LongTerm Exposure to Mobile Source PM in California
    Public Health Effects of Long-Term Exposure to Mobile Source PM in California
    Kleeman, Michael
    ORCID ICON IMG
    2021-09-29 | PDF
    PM2.5 mass concentration fields associated with on-road motor vehicles were created with 1-km spatial resolution for four heavily polluted urban areas in California: Los Angeles, San Francisco, Sacramento, and Fresno. Monthly-average concentration fields were created for the years 2000 through 2011. Concentration fields were predicted with a Chemic ...
  • Emissions Impact of Connected and Automated Vehicle Deployment in California [supporting datasets]
    Circella, Giovanni ;
    Jaller, Miguel
    2021-09-23 | PDF
    This study helps understand how the anticipated emergence of autonomous vehicles will affect various aspects of society and transportation, including travel demand, vehicle miles traveled, energy consumption, and emissions of greenhouse gases and other pollutants. The study begins with a literature review on connected and automated vehicle (CAV) te ...
    Dataset Supporting Files
  • Using CSA Cement for Novel Waterway Repair Materials
    Using CSA Cement for Novel Waterway Repair Materials
    Murray, Cameron D. ;
    Barry, Michelle L
    2021-09-21 | PDF
    Many maritime structures (e.g., locks, dams, ports) in the US are either reaching or are past their design lives, and there are limited funds for necessary maintenance activities which can often lead to closures. These structures are not easy to detour and often require dewatering before repairs can be made. Closures can cause delays and business-r ...
  • Naturalistic Driving Database Development and Analysis of Crash and nearCrash Traffic Events in Honolulu
    Naturalistic Driving Database Development and Analysis of Crash and near-Crash Traffic Events in Honolulu
    Prevedouros, Panos D ;
    Pereira, Luana Carneiro
    2021-09-15 | PDF
    Dashboard cameras and sensors were installed in 233 taxi vans on Oahu, Hawaii which produced several hours of events classified as naturalistic driving data (NDD) in a period of seven months between fall 2019 and spring 2020. The study achieved its objectives to: (1) collect data from NDD events where driving maneuvers caused an acceleration of 0.5 ...
  • PostWildfire Stability and Improvement of Hillslopes Near Pacific Northwest Transportation Infrastructure to Increase Mobility
    Post-Wildfire Stability and Improvement of Hillslopes Near Pacific Northwest Transportation Infrastructure to Increase Mobility
    Akin, Idil
    2021-09-15 | PDF
    An increased incidence of wildfires followed by a wet season in the Pacific Northwest of the United States has resulted in surficial stability issues (erosion, shallow landslides). If a wetting-induced shallow landslide occurs on a highway embankment or on a natural hillslope near Pacific Northwest infrastructure, in addition to human life and prop ...
  • Cargo Routing and Disadvantaged Communities [supporting datasets]
    Jaller, Miguel ;
    Pahwa, Anmol
    2021-09-14 | PDF
    Freight is fundamental to economic growth, however, the trucks that haul this freight are pollution intensive, emitting criteria pollutants and greenhouse gases at high rates. The increasing volume and time-sensitivity of freight demand over the past decade has encouraged carriers to take the fastest route, which is often not an eco-friendly route. ...
    Dataset Supporting Files
  • Extended Development and Testing of Optimized Signal Control With Autonomous and Connected Vehicles
    Extended Development and Testing of Optimized Signal Control With Autonomous and Connected Vehicles
    Elefteriadou, Lily ;
    Ranka, Sanjay
    2021-09-14 | PDF
    Previous work by the University of Florida and FDOT focused on the development of algorithms, software, and hardware solutions to enhance traffic signal control operations simultaneously with vehicle trajectories. These tests focused on the integration of the technology in a mixed traffic stream of autonomous, connected, and conventional vehicles. ...
  • Deep Learning Architectures for SkateboarderPedestrian Surrogate Safety Measures
    Deep Learning Architectures for Skateboarder-Pedestrian Surrogate Safety Measures
    Shourov, Chowdhury Erfan ;
    Sarkar, Mahasweta
    2021-09-12 | PDF
    Skateboarding as a method of transportation has become prevalent, which has increased the occurrence and likelihood of pedestrian-skateboarder collisions and near-collision scenarios in shared-use roadway areas. Collisions between pedestrians and skateboarders can result in significant injury. New approaches are needed to evaluate shared-use areas ...
  • Developing a DataDriven Safety Assessment Framework for RITI Communities in Washington State 2021
    Developing a Data-Driven Safety Assessment Framework for RITI Communities in Washington State [2021]
    Wang, Yinhai ;
    Sun, Wei
    2021-09-10 | PDF
    The roadway safety of the Rural, Isolated, Tribal, or Indigenous (RITI) communities has become an important social issue in the United States. Official data from the Federal Highway Administration (FHWA) shows that, in 2012, 54 percent of all fatalities occurred on rural roads while only 19 percent of the US population lived in rural communities. U ...
  • InService Performance Evaluation of KDOTs Cable Median Barrier
    In-Service Performance Evaluation of KDOT’s Cable Median Barrier
    Stolle, Cody S. ;
    Lechtenberg, Karla A.
    2021-09-04 | PDF
    Kansas Department of Transportation (KDOT) installed approximately 7.9 total miles of cable median barrier (CMB) along K-10, K-96, and US-75 highways in 2011 and 2012. In January 2020, KDOT funded a study to evaluate Kansas CMB performance by analyzing cross-median crashes (CMCs) and cross-median events (CMEs). All crashes which occurred on these r ...
  • Determine Use of Alternate Retroreflective Pavement Markers RPMs on Highways With Centerline Rumble Strips and Winter Weather Pavement Marking Improvements
    Determine Use of Alternate Retroreflective Pavement Markers (RPMs) on Highways With Centerline Rumble Strips and Winter Weather Pavement Marking Improvements
    Ferron, Raissa ;
    Rung, Michael
    2021-09-01 | PDF
    The use of snowplows in northern Texas frequently results in the loss of retroreflective pavement markers (RPMs). The loss of RPMs is not only costly but also creates unsafe driving conditions during inclement weather. Pavement sections in these districts often use a centerline rumble strip for safety. Traditionally, these rumble strips have preclu ...
  • Megaprojects for Megaregions Global Cases and Takeaways
    Megaprojects for Megaregions: Global Cases and Takeaways
    Landis, John D
    ORCID ICON IMG
    2021-09-01 | PDF
    This final report is a summary version of Megaprojects for Megacities: A Comparative Casebook, to be published by Edward Elgar Publishers in 2022; all rights reserved. Megaprojects for Megacities includes detailed case studies and analysis of 14 sets of contemporary megaprojects from around the world, including (i) London Cross rail; (ii) Metro sys ...
  • Effect of Disruptions on Megaregion Emergency Evacuation A Pilot Study
    Effect of Disruptions on Megaregion Emergency Evacuation: A Pilot Study
    Wolshon, Brian ;
    Shapouri, Mohammad
    2021-09-01 | PDF
    The Gulf Coast region of the United States is increasingly vulnerable to a growing list of natural and manmade hazards. Mass evacuations are a fundamental protective action for the safety of the region; however, the complexity of such evacuations makes the rapid movement of people a complex task. This study introduces a performance index that ranks ...
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