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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 961 - 980 of 36049 results
  • Define a Statewide Plan for a Sustainable RealTime Travel Time Network for Texas Hurricane Evacuations and Safe Citizen Return Final Report
    Define a Statewide Plan for a Sustainable Real-Time Travel Time Network for Texas Hurricane Evacuations and Safe Citizen Return – Final Report
    Bathgate, Kyle ;
    Xu, Lu
    2024-08-01 | PDF
    Texas coastal areas are prone to hurricanes, which pose a threat to life, public safety, and critical infrastructure. Mass evacuation can be ordered to relocate residents to safety areas in advance of a hurricane. Access to accurate real-time traffic information can aid public agencies with evacuation operations and evacuees with decision-making. T ...
  • Leveraging LiDAR Intensity to Evaluate Roadway Pavement Marking Retroreflectivity
    Leveraging LiDAR Intensity to Evaluate Roadway Pavement Marking Retroreflectivity
    Brinster, Gregory L ;
    Hodaei, Mona
    2024-08-01 | PDF
    Clearly visible lane markings are important for all road users, particularly autonomous vehicles. In general, nighttime retroreflectivity is one of the most challenging marking visibility characteristics for agencies to monitor and maintain, particularly in cold weather climates when agency snowplows remove retroreflective material during winter op ...
  • iTrain Immersive Training of Department of Transportation Work Zone Inspectors using Virtual Reality Research Summary
    iTrain – Immersive Training of Department of Transportation Work Zone Inspectors using Virtual Reality [Research Summary]
    Edara, Praveen K.
    ORCID ICON IMG
    2024-08-01 | PDF
    The iTrain project, in collaboration with the Missouri Department of Transportation (MoDOT), aimed to enhance work zone safety training of MoDOT staff through the development and implementation of virtual reality (VR) training modules. These modules were designed to provide immersive, realistic, and interactive scenarios to enhance knowledge retent ...
  • Friction Enhancements to Asphalt Pavement Surfaces
    Friction Enhancements to Asphalt Pavement Surfaces
    Roshan, Alireza ;
    Abdelrahman, Magdy
    2024-08-01 | PDF
    Maintaining the appropriate amount of pavement friction is critical for safe driving. Missouri Department of Transportation (MoDOT) has used high friction surface treatment (HFST) since 2013 to restore pavement surface friction where traffic has worn down pavement surface aggregates and to improve wet crash locations. Conventional HFST application ...
  • Resources and Tools to Reduce Multiple Risky Driving Behaviors
    Resources and Tools to Reduce Multiple Risky Driving Behaviors
    Finley, Kari ;
    Hanson, Bridget
    2024-08-01 | PDF
    There is growing recognition that drivers involved in fatal crashes are often engaged in multiple risky behaviors – not wearing a seat belt, speeding, and driving impaired (FARS, 2020). Research has established associations between impulsivity and multiple risky driving behaviors (Bıçaksız & Özkan, 2016b). While the association between impulsivity ...
    Supporting Files
  • Identifying Mental Frameworks Underlying Driver Behavior in Urban Contexts Summary
    Identifying Mental Frameworks Underlying Driver Behavior in Urban Contexts [Summary]
    Carver, DeWayne ;
    Eluru, Naveen
    2024-08-01 | PDF
    The objective of this research was to explore the social and psychological principles that uniquely apply to face-to-face urban transportation systems and apply those to the design of the roadway.
  • Analysis of Asphalt Mixtures Using Alternative Aggregate in SMA and Superpave
    Analysis of Asphalt Mixtures Using Alternative Aggregate in SMA and Superpave
    Liu, Jenny ;
    Kassem, Emad
    2024-08-01 | PDF
    To identify locally available, cost-effective, and durable crushed coarse aggregates for Stone Matrix Asphalt (SMA) and high-level Hot Mix Asphalt (HMA) mixes, multiple well-distributed aggregates have been evaluated in this study as candidate aggregates, including traprock (control), chat, gravels, steel slag, limestone, and dolomite. Aggregate sc ...
  • iTrain Immersive Training of Department of Transportation Work Zone Inspectors using Virtual Reality
    iTrain – Immersive Training of Department of Transportation Work Zone Inspectors using Virtual Reality
    Edara, Praveen K. ;
    Qing, Zhu
    2024-08-01 | PDF
    This report presents the development, implementation, and evaluation of Virtual Reality (VR) training modules designed to enhance work zone safety training for the Missouri Department of Transportation (MoDOT) staff. The project aimed to provide immersive, realistic, and interactive training environments that improve knowledge retention, engagement ...
  • Accelerated Bridge Construction ABC Decision Tool Final Report
    Accelerated Bridge Construction (ABC) Decision Tool: Final Report
    Barutha, Phil ;
    Maguire, Marc
    2024-08-01 | PDF
    This report investigates the creation and assessment of a decision-making tool developed to aid the Nebraska Department of Transportation (NDOT) in determining the suitability of the Accelerated Bridge Construction (ABC) method for bridge replacement projects. The tool utilizes the Analytic Hierarchy Process (AHP) to integrate different criteria, i ...
  • Recommendations for Extension in Service Life of ASRAffected Concrete
    Recommendations for Extension in Service Life of ASR-Affected Concrete
    Kurtis, Kimberly E ;
    Stewart, Lauren K
    2024-08-01 | PDF
    Alkali–silica reaction (ASR), a chemical reaction occurring in concrete between reactive siliceous minerals in some aggregates and alkalis in the concrete pore solution, can produce an expansive gel that, in the presence of sufficient moisture, can lead to expansion and cracking. This not only decreases mechanical properties but also increases perm ...
  • Develop Safety Scoring Tool for the Wet Surface Crash Reduction Program Project Summary
    Develop Safety Scoring Tool for the Wet Surface Crash Reduction Program [Project Summary]
    Wu, Lingtao ;
    Nyamuhokya, Tito
    2024-08-01 | PDF
    Minimizing pavement impact on wet weather crashes is essential to the Wet Surface Crash Reduction Program (WSCRP). Currently, the Texas Department of Transportation has two methods to evaluate pavement friction: the Safer by Design (SBD) method and the pavement surface aggregate classification selection, Form 2088. The research team developed a fra ...
  • Enhanced Capabilities of the Illinois Accelerated Pavement Tester
    Enhanced Capabilities of the Illinois Accelerated Pavement Tester
    Renshaw, Greg ;
    Al-Qadi, Imad L.
    2024-08-01 | PDF
    After being in service for nearly 20 years, the Illinois Accelerated Pavement Tester (I-APT) was upgraded to provide enhanced capabilities for accelerated pavement testing. In addition to a new control system, the improvement included a newly designed load carriage, which allows for testing with a tandem half-axle, axle yaw, and shear loading (brea ...
  • Safety Evaluation of Jturn Intersections in Missouri
    Safety Evaluation of J-turn Intersections in Missouri
    Edara, Praveen ;
    Qing, Zhu
    2024-08-01 | PDF
    The design of J-turn intersections has gained its prevalence in Missouri due to their demonstrated safety benefits. However, with the growing number of J-turns and the availability of more crash data, there is a renewed need to deepen the understanding of the safety performance of J-turns. This study presents a comprehensive safety evaluation of J- ...
  • Snow Plow Performance Measures in NonRWIS Locations
    Snow Plow Performance Measures in Non-RWIS Locations
    Jiang, Gang ;
    Kuang, Biao
    2024-08-01 | PDF
    This project aims to enhance traffic safety by developing an Artificial Intelligence (AI) model and the weather interpolation method to evaluate snow cover conditions on road surfaces using existing roadside Closed-Circuit Television system (CCTV) images in non-Road Weather Information System (RWIS) locations. Snow- cover significantly impacts traf ...
  • InService Safety Evaluation of Indiana Impact Attenuators and Barrier End Treatments Summary
    In-Service Safety Evaluation of Indiana Impact Attenuators and Barrier End Treatments [Summary]
    Tarko, Andrew P. ;
    Romero, Mario A.
    2024-08-01 | PDF
    Crashes related to barrier end treatments and impact attenuators generally have higher severity levels than those colliding with barrier faces. To select the most effective end treatments, the in-service safety evaluation of such end treatments under various operational conditions was needed. This study linked 7 years of crash records with the corr ...
  • Investigation of Hot Mix Asphalt Aging Effect on Mechanical Properties of Mixes Based on Their Binder Performance Results [supporting dataset]
    Abdallah, Imad ;
    Montoya, Miguel A.
    2024-08-01 | XLSX
    The raw data includes one excel file (418 KB) covering measurements including time, temperature, frequency, phase angle, complex modulus, elastic modulus, viscous modulus, complex viscosity, shear stress, and strain.
    Dataset Supporting Files
  • Develop a Retrofit Design for Guard Fence System To Enhance Motorcycle Safety
    Develop a Retrofit Design for Guard Fence System To Enhance Motorcycle Safety
    Schulz, Nathan D. ;
    Bligh, Roger P.
    2024-08-01 | PDF
    Motorcyclists are among the most vulnerable users of the roadway system. The appropriate design of roadside safety systems plays an important role in the severity of injuries caused by motorcycle crashes. Data show that from 2004 to 2017, the number of fatalities related to motorcycle impacts against safety barriers was greater than the number of f ...
  • Evaluate the Safety Effects of Adopting a StopasYield Law for Cyclists in California
    Evaluate the Safety Effects of Adopting a Stop-as-Yield Law for Cyclists in California
    Mahdinia, Iman ;
    Griswold, Julia B
    2024-08-01 | PDF
    The escalating number of injuries and fatalities among cyclists is a pressing safety concern. In the United States, communities are actively seeking strategies to boost cyclist safety, with some states implementing bike-specific policies, such as stop-as-yield laws, to support cyclists. Stop-as-yield laws allow cyclists to treat stop signs as yield ...
  • Friction Enhancements to Asphalt Pavement Surfaces Research Summary
    Friction Enhancements to Asphalt Pavement Surfaces [Research Summary]
    Abdelrahman, Magdy
    ORCID ICON IMG
    2024-08-01 | PDF
    Title 14 of the Code of Federal Regulations defines regulations that are intended to protect aircraft occupants in the event of a survivable civil aircraft crash. The standards for emergency landing conditions (25.562) were developed with a focus primarily on forward-facing seats, although the rules apply to all seats regardless of installation ori ...
  • InService Safety Evaluation of Indiana Impact Attenuators and Barrier End Treatments
    In-Service Safety Evaluation of Indiana Impact Attenuators and Barrier End Treatments
    Pineda-Mendez, Raul A ;
    Guo, Qiming
    2024-08-01 | PDF
    Crashes related to barrier end treatments and impact attenuators generally have higher severity levels than those colliding with barrier faces. To select the most effective end treatments, the in-service safety evaluation of such end treatments under various operational conditions was needed. This study linked 7 years of crash records with the corr ...
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