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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 36104 results
  • Pullout Resistance of Reinforcement of Lightweight Cellular Concrete Fill Technical Summary
    Pullout Resistance of Reinforcement of Lightweight Cellular Concrete Fill [Technical Summary]
    Han, Jie ;
    Ye, Yuqiu
    2023-08-01 | PDF
    This report presents a series of laboratory tests to evaluate the material properties of LCC and the pullout resistances of geogrid and steel strip in LCC specimens cast in the field. Based on the test results, the following conclusions can be drawn: The average wet densities of LCC ranged from 30 to 36 pcf at the age of 28 days and the average dry ...
  • Evaluation of the Asphalt Mixture Design Framework for Airfield Pavements in Illinois
    Evaluation of the Asphalt Mixture Design Framework for Airfield Pavements in Illinois
    Sulaiman, Abdulgafar O ;
    Ali, Uthman Mohamed
    2023-08-01 | PDF
    The Federal Aviation Administration (FAA) advisory circular AC 150/5100-13 authorized the use of state highway material specifications at nonprimary public-use airports serving aircraft less than 60,000 pounds gross weight. This approval is based on the condition that the safety and life span of these airports will not be adversely affected. The us ...
  • Ohios Research Initiative for Locals ORIL Research OnCall Synthesis of OrdinancesPractices on Micromobility Systems Within Ohio 2021ORIL6 Task 8
    Ohio’s Research Initiative for Locals (ORIL) Research On-Call – Synthesis of Ordinances/Practices on Micromobility Systems Within Ohio [2021-ORIL6 Task #8]
    Naik, Bhaven ;
    Thomas, John
    2023-08-01 | PDF
    Ohio’s transportation system has witnessed the inclusion of a new mode of travel – shared micromobility (i.e., scooters, e-bikes, and other methods). Shared-micromobility is beneficial, in that, it connects with the larger transportation system and increases the value of other available transportation options. Initially, there were mixed views on t ...
  • 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 ...
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