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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 2241 - 2260 of 36873 results
  • Crashworthy Perforated Square Steel Tube PSST Mailbox Support Phase I
    Crashworthy Perforated Square Steel Tube (PSST) Mailbox Support – Phase I
    Bielenberg, R.W. ;
    Stolle, C.S.
    2023-07-07 | PDF
    Federal requirements have made it mandatory that safe mailbox support systems be designed to yield or breakaway when impacted by a vehicle. The Nebraska Department of Transportation (NDOT) has previously used a non-proprietary, U-channel post mailbox support that was evaluated at the Midwest Roadside Safety Facility (MwRSF) in the 1980's. NDOT desi ...
  • Image
    Not
    Available
    NY Statewide Behavioral Equity Impact Decision Support Tool with Replica [supporting datasets]
    Chow, Joseph Y J ;
    Ren, Xiyuan
    2023-07-04 | JSON
    A NY statewide model choice model is developed to deterministically fit heterogeneous coefficients for trips along each census block-group OD pair conducted by each population segment within a random-utility-consistent framework. The proposed approach is to use inverse optimization (IO) to derive coefficients for each OD pair times population segme ...
  • Transportation Options VMT Reduction Field Scan
    Transportation Options & VMT Reduction Field Scan
    McCahill, Chris ;
    Link, Megan
    2023-07-01 | PDF
    Minnesota has declared ambitious climate goals aimed at significantly reducing greenhouse gas emissions over the next thirty years, which it plans to accomplish partly through considerable reductions in the average vehicle miles traveled (VMT) per person. This will require close collaboration between local governments and the Minnesota Department o ...
  • Effect of Longitudinal Joint Construction and Density on Asphalt Pavement Performance Phase I State of the Practice Research Project Capsule 233B
    Effect of Longitudinal Joint Construction and Density on Asphalt Pavement Performance— Phase I – State of the Practice: Research Project Capsule [23–3B]
    Akentuna, Moses ;
    Rupnow, Tyson
    2023-07-01 | PDF
    The objective of this study is conduct a literature review regarding the current best practices for longitudinal joint construction.
  • Salt Monitoring and Reporting Technology SMART for Salt Stockpile Inventory Reporting
    Salt Monitoring and Reporting Technology (SMART) for Salt Stockpile Inventory Reporting
    Mahlberg, Justin ;
    Manish, Raja
    2023-07-01 | PDF
    Transportation agencies in northern environments spend a considerable amount of their budget on salt for winter operations. For example, in the state of Indiana, there are approximately 120 salt storage facilities distributed throughout the state and the state expends between 30 M USD and 60 M USD on inventory and delivery each year. Historical tec ...
  • Aviation Fuels Exploring Low Carbon Options Under Current Policy
    Aviation Fuels – Exploring Low Carbon Options Under Current Policy
    Witcover, Julie ;
    Murphy, Colin
    2023-07-01 | PDF
    This paper reviews literature on technological, market, and policy factors affecting the growth of alternative aviation fuels. At present, they represent a minimal fraction of global aviation fuel used but are a critical tool for lowering GHG emissions from aviation. Even with electric and hydrogen power, substantial volumes of low-carbon liquid fu ...
  • Implementation of Retroreflective Pavement Markers RPMs in Rumble Strips as a Method to Enhance Driving Conditions After Snowplow Operations
    Implementation of Retroreflective Pavement Markers (RPMs) in Rumble Strips as a Method to Enhance Driving Conditions After Snowplow Operations
    Ferron, Raissa ;
    Rung, Michael
    2023-07-01 | PDF
    The absence of retroreflective raised pavement markers (RRPMs) due to snowplow operations leads to reduced road safety from lower visibility of the centerline and monetary losses from reinstalling the markers before the end of their service life. Multifunctionalization of rumble strips to serve as both a sensory warning to roadway users who have dr ...
    Supporting Files
  • DataDriven Methods to Assess Transportation System Resilience in Arkansas
    Data-Driven Methods to Assess Transportation System Resilience in Arkansas
    Hernandez, Sarah ;
    Mitra, Suman
    2023-07-01 | PDF
    The work described in this report proposes a foundational and repeatable resiliency assessment methodology to identify the most critical and vulnerable highway infrastructure assets. This study developed resiliency metrics that measure the overall network resiliency as a combination of the probability of disruptions in one or more of the network li ...
  • UltraHighPerformance Concrete UHPC Use in Florida Structural Applications Summary
    Ultra-High-Performance Concrete (UHPC) Use in Florida Structural Applications [Summary]
    DeFord, Harvey “Dale” ;
    Riding, Kyle
    2023-07-01 | PDF
    The objective of this project was to establish mixing, placing, curing, and durability requirements and test methods necessary to produce durable, non-proprietary UHPC made using locally-sourced raw materials for different classes of structural use and exposure conditions.
  • 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 ...
  • 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 ...
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