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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 1601 - 1620 of 35452 results
  • Seat Belt Use in 2022 Use Rates in the States and Territories Traffic Safety Facts Crash Stats
    Seat Belt Use in 2022 — Use Rates in the States and Territories [Traffic Safety Facts - Crash Stats]
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2023-07-01 | PDF
    In 2022 seat belt use in the United States ranged from 67 percent in the U.S. Virgin Islands to 96.5 percent in Oregon. Twenty-six States, the District of Columbia, Guam, Puerto Rico, and the Northern Mariana Islands achieved seat belt use rates of 90 percent or higher. These results are from probability-based observational surveys conducted by the ...
  • 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 ...
  • Implementation of Concrete Overlay Evaluation and Design
    Implementation of Concrete Overlay Evaluation and Design
    Koirala, Niwesh ;
    Hwang, Chuljin
    2023-07-01 | PDF
    The performance of 7-in CRCP overlay on CPCD in US 75 in Sherman, which was built in 2010, has been quite satisfactory. Encouraged by the satisfactory performance of the project, TxDOT Paris District decided to build another CRCP overlay on CPCD in US 82 in Paris. This project is in the westbound direction of US 82 – consisting of 2 main lanes and ...
  • Development of a Test to Quantify Organic Content in Silica Sand Summary
    Development of a Test to Quantify Organic Content in Silica Sand [Summary]
    Shoucair, John ;
    Morrison, Elise
    2023-07-01 | PDF
    The objective of this project was to determine whether a modifed Walkley Black test or elemental analysis of carbon test can be used as a substitute test for the AASHTO T21 or AASHTO T71 tests.
  • North Dakota Statewide Traffic Safety Survey 2023 Traffic Safety Performance Measures for State and Federal Agencies
    North Dakota Statewide Traffic Safety Survey, 2023: Traffic Safety Performance Measures for State and Federal Agencies
    Vachal, Kimberly ;
    Kubas, Andrew
    2023-07-01 | PDF
    The statewide driver traffic safety survey provides baseline metrics for the Highway Safety Division and others to use in understanding perceptions and self-reported behaviors related to focus issues. A core set of questions addressed nationally agreed upon priorities, including seat belts, impaired driving, and speeding. In addition to the core is ...
  • 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 ...
  • Open Framework Standards for Combined Aircraft Sensor Network for the State of Ohio to Detect and Track Lower Altitude Aircraft Fact Sheet
    Open Framework Standards for Combined Aircraft Sensor Network for the State of Ohio to Detect and Track Lower Altitude Aircraft [Fact Sheet]
    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. ...
  • Quick Facts 2021
    Quick Facts 2021
    United States. Department of Transportation. National Highway Traffic Safety Administration
    2023-07-01 | PDF
    Quick reference of 2021 traffic safety numbers and statistics.
  • 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 ...
  • 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 ...
  • 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 ...
  • Cold InPlace Recycling Project Selection and Guidance for Iowa Roadways
    Cold In-Place Recycling Project Selection and Guidance for Iowa Roadways
    Buss, Ashley ;
    Pinto, Irvin
    2023-07-01 | PDF
    Analysis of 44 CIR pavement projects from the Iowa Pavement Management Information System database showed that rutting was the distress that triggered performance concerns first, followed by longitudinal wheel path cracking and transverse cracking. Pavement distress indices typically dropped below trigger values 10 to 15 years after CIR rehabilitat ...
  • DashcamEnabled Deep Learning Applications for Airport Runway Pavement Distress Detection
    Dashcam-Enabled Deep Learning Applications for Airport Runway Pavement Distress Detection
    Malekloo, Arman ;
    Liu, Xiaoyue Cathy
    2023-07-01 | PDF
    Pavement distress detection plays a vital role in ensuring the safety and longevity of runway infrastructure. This project presents a comprehensive approach to automate distress detection and geolocation on runway pavement using state-of-the-art deep learning techniques. A Faster R-CNN model is trained to accurately identify and classify various di ...
  • Tapping Into Autonomous Trucking Data An Intelligent Routine Maintenance Framework for Texas
    Tapping Into Autonomous Trucking Data: An Intelligent Routine Maintenance Framework for Texas
    Chin, Kristie ;
    McAuley, Anna
    2023-07-01 | PDF
    Texas has become a major hub for autonomous trucking activity, with companies operating routes daily and continuing to expand operations onto new roadways. Equipped with high-definition cameras and sensor suites, autonomous trucks present a new data opportunity for the Texas Department of Transportation (TxDOT) to improve its routine maintenance op ...
  • Statewide Nonmotorized Traffic Monitoring Study Research Project Capsule 234SS
    Statewide Non-motorized Traffic Monitoring Study: Research Project Capsule [23–4SS]
    Bian, Ruijie “Rebecca” ;
    Rupnow, Tyson
    2023-07-01 | PDF
    The objectives of this research are to: 1. Consolidate non-motorized traffic data collected by LTRC/DOTD to date onto a GIS platform 2. Explore the possibilities of consolidating non-motorized traffic data collected by other public agencies onto the same GIS platform. 3. Refine expansion factors for short-term counters with additional data. 4. Eval ...
  • 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.
  • 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 ...
  • 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 ...
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