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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 4301 - 4320 of 36908 results
  • Sources of Highway Litter in Utah
    Sources of Highway Litter in Utah
    Chamberlin, Robert ;
    Lincoln, Troy
    2021-02-01 | PDF
    The research described in this report was undertaken at the request of UDOT in order to estimate the sources and major contributors to highway litter in Utah. The research involved outreach to each of the four UDOT Regions to understand the issues with highway litter and litter cleanup. Nine highway sites were selected for a detailed litter survey. ...
  • NonInvasive Detection and Identification of Eastern Hellbender in Ohio Surface Waters Using Environmental DNA
    Non-Invasive Detection and Identification of Eastern Hellbender in Ohio Surface Waters Using Environmental DNA
    Wendell, David ;
    Esfandiari, Leyla
    2021-02-01 | PDF
    This research documents the development and application of an eDNA detection method for Cryptobranchus allegeniensis, or Eastern Hellbender in Ohio surface waters. The purpose of this method is to enable safe, non-invasive and convenient survey strategy for these endangered animals. The DNA amplification target is the Hellbender mitochondrial genom ...
  • Data Mining Twitter To Improve Automated Vehicle Safety
    Data Mining Twitter To Improve Automated Vehicle Safety
    McDonald, Tony ;
    Huang, Bert
    2021-02-01 | PDF
    Automated vehicle (AV) technologies may significantly improve driving safety, but only if they are widely adopted and used appropriately. Adoption and appropriate use are influenced by user expectations, which are increasingly being driven by social media. In the context of AVs, prior studies have observed that major news events such as crashes and ...
  • Evaluation of CostEffective Alternative Designs for Rural Expressway Intersections
    Evaluation of Cost-Effective Alternative Designs for Rural Expressway Intersections
    Molan, Amirarsalan Mehara ;
    Howard, Jonathan
    2021-01-31 | PDF
    Despite numerous studies demonstrating the effectiveness of Restricted Crossing U-Turn (RCUT) intersection design, its implementation remains uneven and close to zero in some large states, including California. This research provides a comprehensive framework to estimate the operational and safety performance of future RCUT designs in California. T ...
  • Sustainable and Healthy Communities Through Integrating Mobility Simulations in the Urban Design Process
    Sustainable and Healthy Communities Through Integrating Mobility Simulations in the Urban Design Process
    Dogan, Timur ;
    Samaranayake, Samitha
    2021-01-27 | PDF
    Rapid urbanization and new global construction estimated to be 250x NYC by 2050 is increasing traffic congestion, pollution, and related health threats. Thus, it is imperative that we develop new modeling capabilities that allow urban designers to quantify the performance of mobility solutions, sustainability, public health impacts, pedestrian ther ...
  • Truck Platooning Effects on Girder Bridges
    Truck Platooning Effects on Girder Bridges
    Steelman, Joshua S. ;
    Puckett, Jay A.
    2021-01-27 | PDF
    Truck platooning – digitally linking two or more trucks to travel in a closely spaced convoy – is increasingly used to save fuel, and reduce driver work and road congestion. Currently, the platoon load effects with several constant headways on bridges have been evaluated and compared to AASHTO design and legal loads. However, reliability assessment ...
  • Get More Out of Variable Speed Limit (VSL) Control: An Integrated Approach to Manage Traffic Corridors with Multiple Bottlenecks [supporting datasets]
    Gao, Hang ;
    Cheng, Shenyang
    2021-01-25 | 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 ...
    Dataset Supporting Files
  • Order Level Optimization in Inventory Management Using Arena Simulation Model
    Order Level Optimization in Inventory Management Using Arena Simulation Model
    Mitrović, Milica ;
    Popović, Dražen
    2021-01-25 | PDF
    By adequately managing inventories, companies adjust demand and supply over time to provide the necessary goods to meet customer requirements and make a profit. A simulation is a great tool for optimizing inventory management by examining system behavior in a variety of settings. This paper presents a simulation model developed in ARENA software to ...
  • COVID19s Effects on The Future of Transportation
    COVID-19’s Effects on The Future of Transportation
    Polzin, Steven ;
    Choi, Tony
    2021-01-14 | PDF
    The COVID-19 pandemic has greatly affected the nation’s transportation users and providers since February of 2020. Urgent questions arise: how will the pandemic affect the long-term future of transportation in the United States and how will the U.S. Department of Transportation and other public and private concerns craft their policies and investme ...
  • Backcalculation of Dynamic Modulus from Falling Weight Deflectometer Data
    Backcalculation of Dynamic Modulus from Falling Weight Deflectometer Data
    Kim, Y Richard ;
    Zeng, Zhe
    2021-01-12 | PDF
    The Mechanistic-Empirical Pavement Design Guide (Pavement ME Guide) and its related software, AASHTOWare Pavement ME Design, have been widely used in the asphalt pavement community. The Guide proposes three analysis levels for highway agencies to use for rehabilitation design. However, as these methods were developed in the early 2000s, certain asp ...
  • Davis Amtrak Station Pilot Project Evaluation: Informing Long Term Solutions to the Davis Amtrak Station Access Barriers [supporting datasets]
    Pike, Susan
    ORCID ICON IMG
    2021-01-11 | PDF
    This study investigates barriers to accessing the Davis Amtrak Station to inform a program designed to increase access to the station with on-demand alternatives. The program aims to decrease private vehicle use to access the station and for travel to locations outside of Davis through partnerships with a carpool/rideshare app, as well as a ridehai ...
    Dataset Supporting Files
  • Annual Technology Transfer Report FY 2019
    Annual Technology Transfer Report FY 2019
    United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology
    2021-01-08 | PDF
    Every year, the Department of Commerce (DOC) submits a Federal Laboratory T2 Fiscal Year Summary Report to the President and the Congress in accordance with 15 U.S.C. 3710(g)(2). The report summarizes the implementation of technology transfer authorities established by the Technology Transfer Commercialization Act of 2000 (Pub. L. 106-404) and othe ...
  • Work Zone Safety Improvements Using Automated Injury Data Collection
    Work Zone Safety Improvements Using Automated Injury Data Collection
    Fyhrie, Patricia B ;
    Ji, Ankyd
    2021-01-07 | PDF
    This research study collected data from approximately 39,000 traffic collision reports including diagrams and narratives for years 2011 through 2017. These reports had to be tracked down, scanned, creating image files made of the diagrams and organizing the data into a searchable database. Furthermore, the narrative portions of each report needed t ...
  • Traffic Safety Improvements at Low Water CrossingsSummary Webinar
    Traffic Safety Improvements at Low Water Crossings—Summary Webinar
    Dobrovolny, Chiara S ;
    Glancy, Chris
    2021-01-07 | PDF
    The research explored strategies and techniques designed to discourage motorists from entering flooded grade crossings resulting in lives saved • Increased the level of knowledge of TxDOT personnel related to the issues and potential solutions for improving safety at LWCs on TxDOT highways. • The research has the potential to improve the quality of ...
  • 2020 GDOT Employee Survey
    2020 GDOT Employee Survey
    DeMeester, Karen ;
    Simmons, Brian
    2021-01-01 | PDF
    The Georgia Department of Transportation (GDOT) 2020 Employee Survey was performed by a research team that included faculty from the University of Georgia College of Engineering and Carl Vinson Institute of Government, in collaboration with GDOT. The research study aimed to increase the response rate and the usefulness of the feedback from the GDOT ...
  • TOD and ParkandRide Which is Appropriate Where
    TOD and Park-and-Ride: Which is Appropriate Where?
    Niles, John S ;
    Pogodzinski, J M
    2021-01-01 | PDF
    Despite the sharp drop in transit ridership throughout the USA that began in March 2020, two different uses of land near transit stations continue to be implemented in the United States to promote ridership. Since 2010, transit agencies have given priority to multi-family residential construction referred to as transit oriented development (TOD), w ...
  • An Enhanced GDOT Pavement Preservation Guide with Optimal Timing of Pavement Preservation
    An Enhanced GDOT Pavement Preservation Guide with Optimal Timing of Pavement Preservation
    Tsai, Yichang ;
    Wang, Zhaohua
    2021-01-01 | PDF
    The objectives of this research are 1) to develop the first version of the comprehensive pavement preservation guide, covering project selection, specification, material selection, construction procedure, quality assurance (QA)/quality control (QC), along with the Web-based pavement preservation interactive tool (PPIT) that enables Georgia Departme ...
  • 2020 Kentucky Transportation Cabinet Maintenance Customer Survey
    2020 Kentucky Transportation Cabinet Maintenance Customer Survey
    Gibson, Bryan ;
    Connair, Katherine
    2021-01-01 | PDF
    The Kentucky Transportation Cabinet (KYTC) periodically surveys drivers to understand their perceptions of the agency’s maintenance activities. In 2020, Qualtrics in conjunction with the Kentucky Transportation Center surveyed 2,100 licensed drivers throughout the state to gauge their perceptions of highway maintenance, identify areas of strength a ...
  • Integration of Automated Vehicle Sensing with Adaptive Signal Control for Enhanced Mobility
    Integration of Automated Vehicle Sensing with Adaptive Signal Control for Enhanced Mobility
    Smith, Stephen F. ;
    Hawkes, Allen
    2021-01-01 | PDF
    This report summarizes the results of a one-year project aimed at exploiting vehicle-to-infrastructure (V2I) communication to enhance the effectiveness of real-time adaptive traffic signal control systems. As originally formulated, the project’s goal was to explore the potential of using the sensing capabilities of connected autonomous vehicles (CA ...
  • TimeBased Modeling of Concrete Bridge Deck Deterioration Using Probabilistic Models
    Time-Based Modeling of Concrete Bridge Deck Deterioration Using Probabilistic Models
    Guler, S I ;
    Radlinska, Aleksandra
    2021-01-01 | PDF
    This research developed a robust, self-learning, probabilistic model to predict the service life of concrete bridge decks and subsequently other infrastructure components. The model originated from the existing performance data for 22,000 bridge decks in the State of Pennsylvania and utilized advanced statistical tools, including Bayesian probabili ...
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