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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 1781 - 1800 of 36114 results
  • Effectiveness of Highway Safety Public Education at Montana Motor Vehicle Registration Stations by Streaming a Variety of Safety Content
    Effectiveness of Highway Safety Public Education at Montana Motor Vehicle Registration Stations by Streaming a Variety of Safety Content
    Villwock-Witte, Natalie ;
    Clouser, Karalyn
    2023-08-01 | PDF
    State departments of transportation, including the Montana Department of Transportation (MDT) focus on eliminating fatalities and serious injuries on our roadways. To accomplish this, MDT employed several strategies including an emphasis on improving traffic safety culture. Traffic safety culture strategies, including public awareness campaigns and ...
  • Evaluation of Hybrid Rubber Modified Asphalt Mixtures and Pavements A Case Study in Virginia
    Evaluation of Hybrid Rubber Modified Asphalt Mixtures and Pavements: A Case Study in Virginia
    Habbouche, Jhony ;
    Nair, Harikrishnan
    2023-08-01 | PDF
    Several state departments of transportation have recognized the benefits of modified asphalt mixtures in resisting multiple modes of climate-and load-induced distresses in flexible pavements. Throughout the past 50 years, asphalt binders have been modified with various components such as styrene-butadiene-styrene (SBS) polymers, ground tire rubber, ...
  • District Highway Maintenance ResearchOnCall Task 8 Improving the Process of Removing Totem Poles
    District Highway Maintenance Research-On-Call Task 8: Improving the Process of Removing Totem Poles
    Witter, Jonathan D ;
    Nazzal, Munir
    2023-08-01 | PDF
    Roadside vegetation management can be a time-consuming and potentially dangerous task, particularly on steep embankments typical of unglaciated regions in Ohio. Furthermore, tree clearing is usually undertaken during difficult weather conditions (i.e., snowy, icy) as regulations for agencies that receive federal funding limit clearing to protect ha ...
  • Pullout Resistance of Reinforcement of Lightweight Cellular Concrete Fill
    Pullout Resistance of Reinforcement of Lightweight Cellular Concrete Fill
    Han, Jie ;
    Ye, Yuqiu
    2023-08-01 | PDF
    Lightweight Cellular Concrete (LCC) (also called foam or gas concrete) is a special construction material, which is typically composed of portland cement, water, and air voids created by a foaming agent. This material has been increasingly used as a backfill material for geotechnical applications. This report presents a series of laboratory tests c ...
  • Digitizing Traffic Control Infrastructure for Autonomous Vehicles AV Summary
    Digitizing Traffic Control Infrastructure for Autonomous Vehicles (AV) [Summary]
    Steele, Joanne ;
    Wu, Jason
    2023-08-01 | PDF
    High precision road maps are a crucial component to facilitating autonomous driving techniques. Autonomous vehicles (AVs) are experiencing exponential growth. According to the latest forecast from IHS Markit, over 33 million AVs will be on the road globally by 2040, posing a higher requirement to ensure AVs’ driving safety. Although current AVs rel ...
  • Performance Evaluation of SP95 and SP125 Superpave Mixtures Summary
    Performance Evaluation of SP-9.5 and SP-12.5 Superpave Mixtures [Summary]
    Wilko, Wayne ;
    Hu, Sheng
    2023-08-01 | PDF
    The objective of this project was to compare the performance of SP-9.5/FC-9.5 to SP-12.5/FC-12.5 Superpave asphalt mixtures and then determine if SP-9.5/FC-12.5 mixtures were at least equivalent to SP-12.5/FC-12.5 mixtures in terms of cracking and rutting resistance, including durability, for use in heavy traffic volume conditions.
  • Achieving Efficiencies Within ODOT With the Event Streaming Platform Fact Sheet
    Achieving Efficiencies Within ODOT With the Event Streaming Platform [Fact Sheet]
    Crow, Mallory ;
    Avery, Paul A
    2023-08-01 | PDF
    The goal of this project is to identify efficiencies across ODOT for the ESP. Future application needs and data automation processes must be defined based on current ODOT personnel activity workflows, repetitive tasks, and activities and integration of cross-process and internal organization collaboration. Use cases and statements of work (SOW) mus ...
  • The Current State of Practice of Building Information Modeling
    The Current State of Practice of Building Information Modeling
    Brooks, Kevin ;
    Gerasimidis, Simos
    2023-08-01 | PDF
    Building information modeling is a combination of technology and processes that has made significant changes to the architecture, engineering, construction, and operations industries. By enabling the visualization of project elements and their data in 3D, it allows for a reduction in unbudgeted changes, increased collaboration and efficiency, and n ...
  • North Carolina Center of Excellence for Mobility and Congestion Summary
    North Carolina Center of Excellence for Mobility and Congestion [Summary]
    University of North Carolina (System). Institute for Transportation Research and Education
    2023-08-01 | PDF
    As urban populations continue to grow, traffic congestion has become an increasingly pressing issue for drivers, leading to a greater demand for advanced navigation aids and traffic management solutions. Real-time traffic information, advanced traffic signal control strategies, and the integration of various data sources can play a crucial role in ...
  • BFRP Rebar Characterization and Performance Summary
    BFRP Rebar Characterization and Performance [Summary]
    Nolan, Steven ;
    Kampmann, Raphael
    2023-08-01 | PDF
    This research was conducted to evaluate the performance of three commercially available BFRP rebar products, before and after exposure to nine different aggressive environments, to develop acceptance criteria specifically for basalt-based fiber-reinforced polymer (BFRP) reinforcing bars.
  • Traffic Control Device Analysis Testing and Evaluation Program FY2022 Activities
    Traffic Control Device Analysis, Testing, and Evaluation Program: FY2022 Activities
    Finley, Melisa D. ;
    Venglar, Steven P.
    2023-08-01 | PDF
    Traffic control devices are a primary means of communicating highway information to road users. The design, application, and maintenance of traffic control devices are under constant transformation as new technologies, methodologies, and policies are introduced. This project provides the Texas Department of Transportation with a mechanism to conduc ...
  • Synthesis Develop Guidance for Local Government Building Codes for Bridges
    Synthesis: Develop Guidance for Local Government Building Codes for Bridges
    Shahandashti, Mohsen ;
    Chao, Shih-Ho (Simon)
    2023-08-01 | PDF
    The design, construction, and maintenance of off-system bridges vary across local governments (cities and counties), often resulting in inferior performance compared to bridges managed by state highway agencies. Limited knowledge of local government practices hinders understanding of the factors contributing to these deficiencies and poses challeng ...
  • Improving Multimodal Traffic Safety for MultiLane Arterials Summary
    Improving Multimodal Traffic Safety for Multi-Lane Arterials [Summary]
    Young, Brenda ;
    Abdel-Aty, Mohamad
    2023-08-01 | PDF
    This project sought to identify factors that impact crashes involving vulnerable road users and evaluate countermeasures that are most effective at managing speed on multi-lane arterials.
  • Ohio Department of Transportation District Highway Maintenance Research OnCall Task 07 Radar Emplacement Prediction Tool Exploration Recommendations
    Ohio Department of Transportation District Highway Maintenance Research On-Call Task 07: Radar Emplacement Prediction Tool Exploration & Recommendations
    Ramaswami, Adithya G ;
    McCrink, Matthew H
    2023-08-01 | PDF
    Emerging autonomous aircraft require unique infrastructure to provide vital information to ensure they remain well-clear of other flying objects. While there are many systems designed to provide such functionality, termed detect and avoid (DAA), ground-based radars have emerged as one of the most promising technical solutions to this challenging pr ...
  • Establishing a Repeatable Method for Presenting Nontraditional Traffic Treatments to Maximize Stakeholder Support
    Establishing a Repeatable Method for Presenting Nontraditional Traffic Treatments to Maximize Stakeholder Support
    Morris, N L ;
    Schwieters, K S
    2023-08-01 | PDF
    A novel infrastructure design known as the J-turn intersection reduces the risk of serious and fatal crashes at thru-STOP intersections through decreasing points of conflict at an intersection by restricting crossing movements from the minor road. Despite their demonstrated safety efficacy, J-turns have not been met with uniformly positive support. ...
  • Traffic Safety Facts 2021 Data Young Drivers
    Traffic Safety Facts 2021 Data: Young Drivers
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2023-08-01 | PDF
    In 2021 there were 2,116 young drivers who died in traffic crashes, an 11-percent increase from 1,899 in 2020. The number of licensed young drivers increased by 1.3 percent from 2020 to 2021. In 2021 there were an estimated 203,256 young drivers injured in traffic crashes, an increase of 7 percent from 189,959 in 2020. Young drivers accounted for 8 ...
  • Alternative Fuel Vehicle Usage and Owner Demographics in New York State An Analysis of 2017 National Household Travel Survey Data
    Alternative Fuel Vehicle Usage and Owner Demographics in New York State: An Analysis of 2017 National Household Travel Survey Data
    Pan, Meiyu (Melrose) ;
    Uddin, Majbah
    2023-08-01 | PDF
    With mounting concerns over climate change and the environmental impact of fossil fuels, the United States has witnessed a growing interest in alternative fuel vehicles (AFVs). In 2021, approximately 1.5 million battery EVs (BEVs), 0.8 million plug-in hybrid EVs (PHEVs), and 5.5 million hybrid EVs (HEVs) were registered in the United States. In the ...
  • State Challenges to Improving Traffic Safety Coordination
    State Challenges to Improving Traffic Safety Coordination
    United States. Department of Transportation. National Highway Traffic Safety Administration. National Center for Statistics and Analysis
    2023-08-01 | PDF
    This report is prepared in response to a requirement in House Report 117-99 (p. 61) that accompanies the Consolidated Appropriations Act, 2022 (Public Law 117-103), requesting information on what challenges States are facing with improving their traffic safety coordination. This report examines challenges States face improving traffic safety inform ...
  • Revised Load Rating Procedures for Deteriorated Prestressed Concrete Beams
    Revised Load Rating Procedures for Deteriorated Prestressed Concrete Beams
    Stripsky, Alex ;
    Breña, Sergio
    2023-08-01 | PDF
    The first prestressed concrete bridge in the United States was built in the early 1950s. Since then, several typical sections have been developed for use in bridge construction including I-beams, deck slabs, box beams, double tees, and so forth. In bridges under aggressive environments, corrosion deterioration of prestressing strands and stirrups h ...
  • Incorporating the Site Variability and LaboratoryInSitu Testing Variability of Soil Properties in Geotechnical Engineering Design
    Incorporating the Site Variability and Laboratory/In-Situ Testing Variability of Soil Properties in Geotechnical Engineering Design
    Abu-Farsakh, Murad ;
    Rahman, Md. Habibur
    2023-08-01 | PDF
    The properties of geomaterials usually vary from one location to another within the same site, in both the vertical and horizontal directions. The variability of soil properties is a complex phenomenon that results from several sources of uncertainties, including inherited spatial variability, measurement error, statistical error, and model bias er ...
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