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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 2141 - 2160 of 36873 results
  • Volume 1 Urban Driver Mental Frameworks and Implications
    Volume 1: Urban Driver Mental Frameworks and Implications
    Eluru, Naveen ;
    Tice, Patricia
    2023-08-23 | PDF
    Over the last 85 years, engineers and researchers have tweaked and analyzed every minute detail of roadway design with one goal: optimizing vehicular speed. Although the industry has been looking seriously at design for other modes since the late 1980’s, the vast majority of the money and energy has been poured into examining every nuance and detai ...
  • Guidelines to Enhance the Constructability of Diverse Modern and Unconventional Intersections and Interchanges DMUII
    Guidelines to Enhance the Constructability of Diverse, Modern, and Unconventional Intersections and Interchanges (DMUII)
    Rasdorf, William ;
    Rouphail, Nagui
    2023-08-15 | PDF
    The current focus on promoting sustainability in the United States transportation infrastructure has led to adopting Diverse, Modern, and Unconventional Intersections and Interchanges (DMUII) to improve traffic flow while ensuring safety. However, the adoption of DMUII designs presents challenges, including a learning curve for the public and contr ...
  • Economic Contribution of Rail in North Carolina
    Economic Contribution of Rail in North Carolina
    Brock, Tim ;
    Hassett, Ryan
    2023-08-11 | PDF
    This research effort is part of a collaborative research project between the North Carolina Department of Transportation (NCDOT) and North Carolina State University’s (NCSU’s) Institute for Transportation Research and Education (ITRE). NCDOT Rail Division's mission is the “…safe and efficient movement of people and goods on North Carolina's railroa ...
  • Truck Platooning Effects on Girder Bridges Phase IIService
    Truck Platooning Effects on Girder Bridges: Phase II-Service
    Steelman, Joshua S. ;
    Puckett, Jay A.
    2023-08-11 | PDF
    Truck platooning—wirelessly linking two or more trucks to travel in a closely spaced convoy—is federally promoted to save fuel, improve the environment, and improve traffic operations. Platooning places trucks much closer than current design codes anticipate. While this strategy can provide higher fuel efficiency, it also can potentially overload s ...
  • Measuring and Improving the Effectiveness of ADOTs Employee Learning and Development Program
    Measuring and Improving the Effectiveness of ADOT’s Employee Learning and Development Program
    Perry, MacKenna ;
    Manseth, Kristi
    2023-08-09 | PDF
    Arizona Department of Transportation's (ADOT) Employee and Business Development (EBD) office develops and provides required and elective training to ADOT staff and to external stakeholders. For its training programs, EBD’s objectives are to: (1) Improve employee competence and performance to enhance the performance of the agency; (2) Improve employ ...
  • Microbial Concrete Sealer
    Microbial Concrete Sealer
    El-Hajj, Bashear ;
    Pitell, Sarah
    2023-08-05 | PDF
    Portland Cement Concrete (PCC) is the most widely used construction material due to its versatility, durability, and economy (Mindess et al. 2003). However, PCC is also a quasi-brittle material that has low tensile strength and ductility, as well as weak resistance to the propagation of cracks. Also, problems related to shrinkage, durability and wo ...
  • MultiModal Intelligent Traffic Signal System MMITSS Phase III Extension for Additional Enhancements
    Multi-Modal Intelligent Traffic Signal System (MMITSS) Phase III Extension for Additional Enhancements
    Zhou, Kun ;
    Gan, Qijian
    2023-08-03 | PDF
    In the California Connected Vehicle (CV) Testbed, four intersections have been instrumented with NoTraffic sensors for more accurate detection of multi-modal traffic within the intersection conflict area, and six operational High Intensity Activated CrossWalK (HAWK) signals have been installed to enhance the safety for pedestrians and cyclists whil ...
  • 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.
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