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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 1861 - 1880 of 36114 results
  • Determining Sample Measures of Distracted Driving Distracted Pedestrian Activities and Impacts of Such Behavior on Traffic Operations at Signalized Intersections Brief
    Determining Sample Measures of Distracted Driving, Distracted Pedestrian Activities and Impacts of Such Behavior on Traffic Operations at Signalized Intersections [Brief]
    Ballard, Tricia (Labud) ;
    Abou-Senna, Hatem
    2023-08-01 | PDF
    How much time is lost due to traveler distraction? Florida law prohibits texting while a vehicle is moving, but how much travel delay is caused by drivers looking at their phone while stopped at a traffic light or a pedestrian responding to a text message while traversing a crosswalk?
  • Traffic Safety Facts 2021 Data Older Population
    Traffic Safety Facts 2021 Data: Older Population
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2023-08-01 | PDF
    In 2021 there were 7,489 people 65 and older killed in traffic crashes in the United States, accounting for 17 percent of all traffic fatalities. From 2020 to 2021 there was a 14-percent increase in the number of people 65 and older killed in traffic crashes. In 2021 there were 55.8 million people—17 percent of the total U.S. population—who were 65 ...
  • Centering the Margins The Transportation Experience of Underserved Communities
    Centering the Margins: The Transportation Experience of Underserved Communities
    Fan, Yingling ;
    Greenberg, Gillian
    2023-08-01 | PDF
    Transportation systems, as integral parts of human settlements, reflect the societal structures and cultural ideologies influenced predominantly by the dominant race or class. In the absence of prioritizing the transportation needs of underserved communities, transportation systems may perpetuate systematic inequities. This study aims to address th ...
  • Assessment of the Infrastructure Readiness for Connected Vehicle to Infrastructure Applications on Arterial Streets Summary
    Assessment of the Infrastructure Readiness for Connected Vehicle to Infrastructure Applications on Arterial Streets [Summary]
    Vollmer, Derek ;
    Hadi, Mohammad
    2023-08-01 | PDF
    Connected vehicles (CV) are the future. To be safe, modern CVs must communicate with the infrastructure around them. Therefore, the Florida Department of Transportation (FDOT) needs to establish requirements for CV applications used in conjunction with roadside equipment (RSE) like signal controllers.
  • Evaluation of Slurry Spreaders and Plows Underbody Wing and TwoWay Reversible
    Evaluation of Slurry Spreaders and Plows (Underbody, Wing and Two-Way Reversible)
    Hirt, Brian ;
    Waidley, Greg
    2023-08-01 | PDF
    MnDOT evaluated five pieces of new winter maintenance equipment: two slurry spreaders, an underbody scraper, a true-float wing plow and a two-way reversible plow. For Winter 1 of the evaluation program, all equipment was acquired, installed, and field-tested in MnDOT District 2. For Winter 2, a data collection program was developed to capture quant ...
  • Evaluation of Jobsite Cylinder Curing Practices for the Alabama Concrete Industry
    Evaluation of Jobsite Cylinder Curing Practices for the Alabama Concrete Industry
    White, Jackson L ;
    Fleming, Kyle R
    2023-08-01 | PDF
    The effect of initial curing temperature and duration on the 28-day compressive strength of concrete was experimentally evaluated. Concrete cylinders were cured at six initial curing temperatures (60, 68, 78, 84, 90, and 100 ⁰F) for three different initial curing durations (24, 48, and 72 hours). After the initial curing duration was complete, the ...
  • Investigate Potential Connected and Automated Vehicle CAV Liability Issues Within TxDOT Project Summary
    Investigate Potential Connected and Automated Vehicle (CAV) Liability Issues Within TxDOT [Project Summary]
    Stoeltje, Gretchen ;
    Hwang, Billy
    2023-07-31 | PDF
    This project is one of the first CAV research projects focused on liability issues from a state department of transportation perspective. The research team was a collaboration between the Texas A&M Transportation Institute and Stantec. Six research tasks were conducted to identify potential tort liability from the deployment of CAV technologies. A ...
  • Intelligent Transportation Systems Security Control Set Template and Instructions
    Intelligent Transportation Systems Security Control Set Template and Instructions
    Gabel, Randy ;
    Sames, Christina
    2023-07-31 | PDF
    This document is a template and instructions for developing control sets for ITS physical objects (systems and devices) as defined in Architecture Reference for Cooperative and Intelligent Transportation (ARC-IT). The control sets can be provided to developers and can be used to identify requirements for developing and assessing physical objects. T ...
  • Working With Autonomous Trucks To Improve Routine Maintenance Operations Research Brief
    Working With Autonomous Trucks To Improve Routine Maintenance Operations [Research Brief]
    Chin, Kristie ;
    Gold, Andrea
    2023-07-31 | PDF
    The aim of Project 0-7129 was to demonstrate that AV trucking data can be effectively ingested and reported to TxDOT maintenance personnel, improving operational efficiency. Texas leads the nation in AV testing and deployment, with significant stakeholder support for the IRMF’s potential to reduce reporting latency and improve geographical and seve ...
  • Development of a Fatigue Testing Protocol for Supporting Integrated Design of Asphalt Pavement
    Development of a Fatigue Testing Protocol for Supporting Integrated Design of Asphalt Pavement
    Solaimanian, Mansour ;
    Sahraei, Ali
    2023-07-28 | PDF
    This research study was sponsored by PennDOT and US DOT Transportation Research Center to evaluate the potential of the Hamburg wheel tracking device (HWTD) in determining the mix quality in terms of fatigue cracking resistance. The research work included applying changes to HWTD, developing the test setup and the experimental plan, conducting the ...
  • 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 ...
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    NY Statewide Behavioral Equity Impact Decision Support Tool with Replica [supporting datasets]
    Chow, Joseph Y J ;
    Ren, Xiyuan
    2023-07-04 | ZIP
    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
  • Intelligent Queue Length Estimation on Ramps Using Computer Vision and Machine Learning Algorithms
    Intelligent Queue Length Estimation on Ramps Using Computer Vision and Machine Learning Algorithms
    Tiwari, Sushant ;
    Rashidi, Abbas
    2023-07-01 | PDF
    Traffic sensors are utilized to capture real-time traffic parameters. Many Departments of Transportation in the United States use inductance loops. Induction loops often fail to give accurate results during highly congested periods, which is the most crucial time for ramp metering operations. Image processing and computer vision may provide an alte ...
  • 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.
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