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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 981 - 1000 of 36104 results
  • Vermont Smart Growth Vehicle Miles Traveled and Greenhouse Gas Research
    Vermont Smart Growth, Vehicle Miles Traveled, and Greenhouse Gas Research
    Sentoff, Karen ;
    Mansfield, Theodore
    2024-08-12 | PDF
    The Global Warming Solutions Act (GWSA) set targets for Vermont to reduce greenhouse gas (GHG) emissions to 80% below 1990 levels by 2050. Recognizing that transportation accounts for the largest share of the State’s total GHG emissions, the Climate Action Plan identified reduction in vehicle miles traveled (VMT) as a key pathway to meet targets an ...
  • Initiating Seed Production for Effective Establishment of Native Plants on Roadsides in New England
    Initiating Seed Production for Effective Establishment of Native Plants on Roadsides in New England
    Campanelli, John ;
    Kuzovkina, Julia
    2024-08-09 | PDF
    This report provides guidance for the establishment of native habitats in New England. It describes the seed mixes of native plants for various soil conditions, establishment of native habitats using various techniques, guidelines for conservation mowing and ecotypic seed production in the region.
  • Framework and Methodology for RiskBased Bridge and Tunnel Asset Management Objective Risk Assessment and Network Level Evaluation
    Framework and Methodology for Risk-Based Bridge and Tunnel Asset Management: Objective Risk Assessment and Network Level Evaluation
    Yang, David Y. ;
    Khosravifar, Arash
    2024-08-02 | PDF
    This report presents the results of the project on establishing a general framework and methodology for risk-based bridge and tunnel asset management. The research was carried out at Portland State University in collaboration with engineers and officials at Oregon Department of Transportation (ODOT) and Federal Highway Administration (FHWA). The pr ...
  • Influencing Travel Behavior via an OpenSource Platform Phase 2 Brief
    Influencing Travel Behavior via an Open-Source Platform Phase 2 [Brief]
    Valdes, Didier M. ;
    Figueroa-Medina, Alberto M
    2024-08-01 | PDF
    This project uses the open-source platform OneBusAway (OBA) developed at USF to explore strategies that can influence travel behavior to increase transit ridership. OneBusAway currently provides real-time transit information to users on a full range of devices and communication platforms, such as mobile apps, and serves more than 400,000 individual ...
  • ODOTs Snow and Ice Performance Evaluation Tools A Student Transportation Advancement Research STAR Project Fact Sheet
    ODOT‘s Snow and Ice Performance Evaluation Tools - A Student Transportation Advancement Research (STAR) Project [Fact Sheet]
    Masanja, Ntemi Methusela ;
    Mihayo, Meshack P
    2024-08-01 | PDF
    Severe winter weather poses a significant threat to road users, primarily due to slippery road surfaces, which considerably increase the risk of crashes and injuries. Additionally, such conditions can disrupt traffic flow on highways, causing speed reductions, decreased highway capacity, or even complete traffic lockdowns. Most Departments of Trans ...
  • Business Processes to Prioritize Traffic Signal Retiming and Assess the Impact of Retiming Activities
    Business Processes to Prioritize Traffic Signal Retiming and Assess the Impact of Retiming Activities
    Saldivar-Carranza, Enrique Daniel ;
    Platte, Tom
    2024-08-01 | PDF
    The Indiana Department of Transportation (INDOT) manages over 2,000 traffic signals in the State. It is unfeasible to identify systemwide improvement opportunities by evaluating the performance of thousands of traffic signals on monitoring dashboards. This report describes how a scalable technique based on connected vehicle (CV) trajectory data sys ...
  • Countermeasures for Maintaining Safe and Effective Public Transit Service in the PostCOVID19 Era
    Countermeasures for Maintaining Safe and Effective Public Transit Service in the Post-COVID-19 Era
    Qi, Yi ;
    Zhao, Qun
    2024-08-01 | PDF
    During the COVID pandemic, to prevent the spread of the virus, countries adopted various safety measures, including masking, social distancing, and vaccination. However, there is a lack of methods that can quantitively evaluate the effectiveness of these countermeasures. To fill the gap, this research first develops a model to quantitively evaluate ...
  • Energy and Emissions Impacts of Atlantas Reversible Express Toll Lanes and HighOccupancy Toll Lanes
    Energy and Emissions Impacts of Atlanta’s Reversible Express Toll Lanes and High-Occupancy Toll Lanes
    Lu, Hongyu ;
    Liu, Haobing
    2024-08-01 | PDF
    This report summarizes the impact on corridor-level energy use and emissions associated with the 2018 opening of the I-75 Northwest Corridor (NWC) and I-85 Express Lanes in Atlanta, GA. The research team tracked changes in vehicle throughput on the managed lane corridors (extracted from GDOT’s Georgia NaviGAtor machine vision system after comprehen ...
  • 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 ...
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