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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 4161 - 4180 of 36011 results
  • Developing a Small Airport Economic Impact Estimator Project Summary
    Developing a Small Airport Economic Impact Estimator [Project Summary]
    Borowiec, Jeffrey D. ;
    Glover, Brianne
    2020-10-31 | PDF
    The research team found that building an estimator tool that can be tailored to each airport provides more precise estimates of that airport’s impact. The model and tool move beyond the statewide study by using region-specific estimates and inputs, where possible, and allowing for user input when conditions have changed since the last statewide eco ...
  • Real-World Use of Automated Driving Systems and their Safety Consequences: A Naturalistic Driving Data Analysis [supporting datasets]
    Kim, Hyungil ;
    Song, Miao
    2020-10-31 | ZIP
    Automated driving systems (ADS) have the potential to fundamentally transform transportation by reducing crashes, congestion, and cost while improving traffic efficiency and access to mobility for the transportation-challenged population. However, people may not use ADS as intended due to their misunderstanding of such systems’ capabilities and lim ...
    Dataset Supporting Files
  • Roadside Safety Device Analysis Testing and Evaluation Program Project Summary
    Roadside Safety Device Analysis, Testing, and Evaluation Program [Project Summary]
    Bligh, Roger P. ;
    Abu-Odeh, Akram
    2020-10-30 | PDF
    Roadway departure crashes represent approximately 50 percent of fatalities on Texas roadways each year. Roadside safety devices shield motorists from roadside hazards such as non-traversable terrain and fixed objects, thereby reducing injuries and fatalities associated with roadway departure crashes. Development of new or improved roadside safety d ...
  • Uncertainty Analysis in Rock Mass Classification and Its Application to Reliability Evaluation in Tunnel Construction
    Uncertainty Analysis in Rock Mass Classification and Its Application to Reliability Evaluation in Tunnel Construction
    Lu, Hui ;
    Gutierrez, Marte
    2020-10-30 | PDF
    With the increasing demand for tunnels in sensitive urban environments, pressure balance mechanized tunneling is employed in most soft ground tunnel construction projects. Segmental tunnel lining is used in pressure balance mechanized tunneling as temporary and final support. With common service life requirements of 100 and even 150 years, efficien ...
  • Distribution Roosting and Foraging Ecology and Migration Pathways for Gray Bats in Western North Carolina
    Distribution, Roosting and Foraging Ecology, and Migration Pathways for Gray Bats in Western North Carolina
    Weber, Joey A. ;
    O'Keefe, Joy M.
    2020-10-30 | PDF
    The authors conducted a two-year study to assess the distribution, roosting and foraging ecology, migratory movements, and winter habits of gray bats (Myotis grisescens) in the French Broad River Basin of western North Carolina. By August 2020, the authors knew of 37 roosts in the basin. Gray bats actively forage across the basin, but activity is h ...
  • TDOT Bicycle Pedestrian Counting Best Methodologies Assessment
    TDOT Bicycle & Pedestrian Counting: Best Methodologies Assessment
    Shah, Nitesh ;
    Cherry, Christopher
    2020-10-30 | PDF
    Transportation agencies throughout the United States are systematically counting bicycles and pedestrians to plan, fund, and evaluate nonmotorized infrastructure. This project evaluated nonmotorized count methods and technologies and developed recommendations to integrate them into Tennessee's statewide count program. We first did a nationwide scan ...
  • Remote Sensing in Maintenance Work
    Remote Sensing in Maintenance Work
    Bitzan, Nicole ;
    Marti, Michael
    2020-10-30 | PDF
    Safety for the general public and Department workers is a key value within Minnesota Department of Transportation (MnDOT). As MnDOT works within its right-of-way (ROW), that safety concern extends to the safety needs of maintenance staff in field work, as well as those of the unsheltered homeless population, who may camp on MnDOT’s ROW. Therefore, ...
  • Michigan Transportation Construction Price Index Final Report II
    Michigan Transportation Construction Price Index [Final Report II]
    Liu, Hexu ;
    Kwigizile, Valerian
    2020-10-21 | PDF
    The Highway Construction Cost Index (HCCI) measures the price changes of construction items over time in the highway construction industry. It is designed to monitor fluctuations in highway construction market conditions and to indicate the purchasing power of the infrastructure agency. Although many state DOTs, including Michigan DOT (MDOT), have ...
  • CostEffective Designs of Smart City Technologies for Vehicular Communications
    Cost-Effective Designs of Smart City Technologies for Vehicular Communications
    Peha, Jon M ;
    Ligo, Alexandre K
    2020-10-20 | PDF
    The impediments to progress in connected vehicles are not all technical. Public policy governs spectrum management, and the deployment of infrastructure for purposes such as safety on our roads. In the U.S., the Department of Transportation and the Federal Communications Commission are currently in vehement public disagreement over how to manage sp ...
  • Efficient Extraction and Evaluation of Complex Pavement Markings from Mobile Laser Scan Data [supporting dataset]
    Jung, Jaehoon ;
    Olsen, Michael J.
    2020-10-13 | ZIP
    The dataset is an annotated point cloud in ASPRS LAS v1.2 format, which is annotated with different classification numbers representing six different road markings, including lane markings (1), pedestrian crosswalk and text (2), bike (3), left arrow (4), right arrow (5), straight arrow (6), and others (0). The point cloud dataset was obtained using ...
    Dataset Supporting Files
  • Exploring Weather-Related Connected Vehicle Applications for Improved Winter Travel in the Pacific Northwest [supporting dataset]
    Shi, Xianming
    ORCID ICON IMG
    2020-10-13 | ZIP
    The objectives of this project were to investigate how connected vehicle (CV) data could be integrated with existing infrastructure data, and how the integrated data could be utilized to improve decision-making for highway operations and to enhance traveler information during inclement winter weather events. Because of some unforeseen difficulties, ...
    Dataset Supporting Files
  • Taming and Tapping the Bikeshare Explosion: Review of Shared Micro-mobility Laws [supporting dataset]
    Pimentel, David ;
    Lowry, Michael B.
    2020-10-13 | ZIP
    The file is a Microsoft Access Database of laws governing e-bikes (bicycles equipped with electric motors to assist in propulsion), and e-scooters (stand-up kick scooters powered by an electric motor) in all fifty states and the District of Columbia. The researchers used the LEXIS/NEXIS legal database, WESTLAW, and state-operated websites in each a ...
    Dataset Supporting Files
  • SelfEvaluation and Readiness of Alaska DOTPF on Deployment of Connected and Automated Vehicle CAV on Alaskan Roads
    Self‐Evaluation and Readiness of Alaska DOT&PF on Deployment of Connected and Automated Vehicle (CAV) on Alaskan Roads
    Vasudevan, Vinod ;
    Heidari, Mohammad
    2020-10-13 | PDF
    The United States Department of Transportation’s (USDOT) Transportation Systems Management and Operations/Connected and Automated Vehicle Capability Maturity Model (TSMO/CAV CMM) Framework published in 2017 provides a clear set of guidelines to departments of transportation (DOTs) across the country for assessing and advancing state and local trans ...
  • InService Performance Evaluation of Concrete Sloped End Treatments in Iowa
    In-Service Performance Evaluation of Concrete Sloped End Treatments in Iowa
    Lingenfelter, Jessica L. ;
    Stolle, Cody S.
    2020-10-12 | PDF
    Sloped end treatments were historically developed as low-cost, low-maintenance end treatments for rigid features like concrete barriers and bridge rails. Crash testing indicated that sloped end treatments are associated with significant instability and rollover risk for impacting vehicles. However, the in-service performance of these features has n ...
  • MU3 Stream Surveys Mussels
    MU-3 Stream Surveys – Mussels
    Dunford, Dale ;
    Schwegman, Ryan
    2020-10-12 | PDF
    This report summarizes the freshwater mussel survey results from 12 western Pennsylvania streams. Over 12,600 mussels were observed representing 28 species. Data and analyses collected for these surveys now represents the best available scientific data in these stream reaches.
  • Imaging Ahead of Tunnel Boring Machines With DC Resistivity
    Imaging Ahead of Tunnel Boring Machines With DC Resistivity
    Swidinsky, Andrei ;
    Mifkovic, Max
    2020-10-07 | PDF
    Tunnel boring machines (TBMs) are often used for underground tunneling and construction projects. However, there are dangers and risks during underground construction from unknown hazards ahead of tunneling operations, which may result in surface settlement and machine damage. Geophysical methods have the potential to improve tunneling projects by ...
  • Shared Rail Corridor Adjacent Track Accident Risk Analysis Part 2
    Shared Rail Corridor Adjacent Track Accident Risk Analysis - Part 2
    Barkan, Christopher P L ;
    Lin, Chen-Yu
    2020-10-05 | PDF
    Shared or mixed use corridors refer to different types of passenger and freight trains using common infrastructure in one way or another. Different characteristics from different types of operation may result in complicated operating environments. A high priority for any rail system is operating safety, and there are several questions associated wi ...
  • Development of 3D Printed Materials for Rapid Fabrication of Pedestrian and Bicycle Infrastructure to Increase Mobility
    Development of 3D Printed Materials for Rapid Fabrication of Pedestrian and Bicycle Infrastructure to Increase Mobility
    Lehman, Dawn ;
    Ganter, Mark
    2020-10-02 | PDF
    Advancements in fabrication of manufacturing and medical systems are focusing on using computer-aided fabrication methods, also termed additive manufacturing or 3D printing. In civil engineering, we still rely on traditional methods of construction. Although some researchers and companies have investigated 3D printing of concrete, most have focused ...
  • Impact of COVID19 on Travel Behavior and Shared Mobility Systems
    Impact of COVID-19 on Travel Behavior and Shared Mobility Systems
    Menon, Nikhil ;
    Keita, Yaye
    2020-10-01 | PDF
    As the COVID-19 outbreak continues to evolve, transportation systems must adapt quickly to satisfy the needs of this new reality. This necessitates further studies to understand and develop strategies that can be used to navigate this new reality, mitigate the effects from potential contagion spread, and achieve positive and healthful outcomes at a ...
  • Performance of RightTurn Lane Designs at Intersections
    Performance of Right-Turn Lane Designs at Intersections
    Ukkusuri, Satish ;
    Ling, Lu
    2020-10-01 | PDF
    Right-turn lane (RTL) crashes are among the most key contributors to intersection crashes in the US. Based on their design, traffic volume, and location, different right-turn lanes have varying levels of crash risk. Therefore, engineers and researchers have been looking for alternative ways to improve the safety and operation of right-turn traffic. ...
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