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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 4601 - 4620 of 36908 results
  • 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 | PDF
    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 | PDF
    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 | PDF
    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. ...
  • Traffic Control Device Analysis Testing and Evaluation Program FY2019 Activities
    Traffic Control Device Analysis, Testing, and Evaluation Program: FY2019 Activities
    Finley, Melisa D. ;
    Fitzpatrick, Kay
    2020-10-01 | PDF
    This project provides the Texas Department of Transportation with a mechanism to conduct high-priority, limited-scope evaluations of traffic control devices. Work conducted and concluded during the 2019 fiscal year included: (1) Review of the application of embedded light-emitting diodes (LEDs) in signs. (2) Review of the design and application of ...
  • Assessment of Compatibility of Mineral Aggregates and Binders Used in Highway Construction and Maintenance Projects [supporting datasets]
    Hossain, Zahid ;
    Elsayed, Ashraf
    2020-10-01 | PDF
    Stripping and delamination have been deemed as some of the major premature pavement distresses to most state Departments of Transportations (DOTs) and highway agencies including the Arkansas Department of Transportation (ARDOT). It is believed that the poor compatibility between asphalt binders and aggregates is one of the major reasons behind this ...
    Dataset Supporting Files
  • Workshop on Implementing Ultra Thin Slurry Surfacing on TxDOT Roadways Workshop Instructor Guidebook
    Workshop on Implementing Ultra Thin Slurry Surfacing on TxDOT Roadways: Workshop Instructor Guidebook
    Nyamuhokya, Tito ;
    Scullion, Tom
    2020-10-01 | PDF
    In research project 0-6615, Use of Fine Graded Asphalt Mixes, which ended on August 31, 2012, the Performing Agency developed a new generation of slurries to be implemented for pavement preservation in test sections around Texas. This new generation of slurries had not been evaluated widely on Texas Highways by the Receiving Agency, but several Rec ...
  • Southern California Regional Workforce Development Needs Assessment for the Transportation and Supply Chain Industry Sectors
    Southern California Regional Workforce Development Needs Assessment for the Transportation and Supply Chain Industry Sectors
    O'Brien, Tom ;
    Matsumoto, Deanna
    2020-10-01 | PDF
    COVID-19 brought the public’s attention to the critical value of transportation and supply chain workers as lifelines to access food and other supplies. This report examines essential job skills required of the middle-skill workforce (workers with more than a high school degree, but less than a four-year college degree). Many of these middle-skill ...
  • Advanced Modeling and Design Methodology for Pavements Using Plasticity-Based Shakedown Theory [supporting datasets]
    Chen, Shengli ;
    Sun, Chao
    2020-10-01 | PDF
    Pavement design is a process intended to find the most economical combination of layer thickness and material type for the pavement, taking into account the properties of the subgrade soil and the traffic to be carried during the service life of the road. The currently prevalent methods of pavement analysis and design, however, are more or less emp ...
    Dataset Supporting Files
  • Automated and Connected Vehicle AVCV Test Bed to Improve Transit Bicycle and Pedestrian Safety Phase II Technical Report
    Automated and Connected Vehicle (AV/CV) Test Bed to Improve Transit, Bicycle, and Pedestrian Safety: Phase II Technical Report
    Turnbull, Katherine F. ;
    Balke, Kevin
    2020-10-01 | PDF
    Crashes involving transit vehicles, bicyclists, and pedestrians are a concern in Texas, especially in urban areas. This research explored the potential of automated and connected vehicle (AV/CV) technology to reduce or eliminate these crashes. The project objectives focused on identifying safety concerns related to the interaction of transit vehicl ...
  • Get More Out of Variable Speed Limit VSL Control An Integrated Approach to Manage Traffic Corridors with Multiple Bottlenecks
    Get More Out of Variable Speed Limit (VSL) Control: An Integrated Approach to Manage Traffic Corridors with Multiple Bottlenecks
    Gao, Hang ;
    Cheng, Shenyang
    2020-10-01 | PDF
    The model based variable speed limit (VSL) control has been proven effective to resolve capacity-drop and time delay at a single recurrent bottleneck in previous studies. This project applies VSL controls to the traffic corridors with multi-segment and multi-bottleneck with the objective of reducing fuel consumption and greenhouse gas emissions. Ba ...
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