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University Transportation Centers

rosaP Repository & Open Science Access Portal

USDOT’s University Transportation Centers (UTC) Program, launched in 1988, awards and administers grants to consortia of colleges and universities across the United States. Each UTC forms a unique center of transportation excellence on a specific research topic. The UTC Collection brings together the research outputs of these consortia. To learn more about the UTC program , visit https://www.transportation.gov/content/university-transportation-centers. Bookmark this collection: https://rosap.ntl.bts.gov/collection_utcp or https://doi.org/10.21949/1530855.

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Showing 861 - 880 of 9353 results
  • A General Traffic Equilibrium Framework with RideHailing Services That Considers FlowDependent Waiting Time and Public Transit
    A General Traffic Equilibrium Framework with Ride-Hailing Services That Considers Flow-Dependent Waiting Time and Public Transit
    Pang, Jong-Shi ;
    Dessouky, Maged M.
    2024-05-01 | PDF
    We develop a general traffic equilibrium model that considers ride-hailing services provided by Transportation Network Companies (TNCs, e.g., Uber and Lyft) and customer waiting. The equilibrium model integrates three interacting sub-models, including TNCs' decision on dispatching ride-hailing vehicles, travelers' choice of which mode to use, and q ...
  • Computer Vision for Traffic Monitoring
    Computer Vision for Traffic Monitoring
    Thompson, Matthew ;
    Lowry, Michael
    2024-05-01 | PDF
    This project examined computer vision applications for traffic monitoring and safety analysis. The focus was on evaluating the open-source computer vision code that we developed. Three case studies were completed using our computer vision code. The code was written in Python and uses a detection model called YOLOv8. The first case study demonstrate ...
  • Mobility and Safety Impacts of Work Zone Lane and Shoulder Widths
    Mobility and Safety Impacts of Work Zone Lane and Shoulder Widths
    Chitturi, Madhav V. ;
    Vorhes, Glenn
    2024-05-01 | PDF
    The goal of this project was to quantify the mobility and safety impacts of different combinations of lane width and shy distance to a barrier for a given paved width. The research team developed a device to measure lateral distance and derive speed, vehicle length/type, and headway information under day and night conditions. Data collected at 17 l ...
  • Impacts of COVID19 Induced Active Transportation Demand on the Built Environment and Public Health
    Impacts of COVID-19 Induced Active Transportation Demand on the Built Environment and Public Health
    Dadashova, Bahar ;
    Lee, Chanam
    2024-05-01 | PDF
    COVID-19 had a significant impact on people’s mobility. According to observational studies, the number of people bicycling and walking increased considerably during the social distancing orders. Various reasons may have contributed to this surge in bicycling and walking activities during the lockdown period, such as limited opportunities for physic ...
  • Heterogeneous Preferences for Activities While Traveling in Autonomous Vehicles Relationships with Travel Contexts and Attitudes
    Heterogeneous Preferences for Activities While Traveling in Autonomous Vehicles: Relationships with Travel Contexts and Attitudes
    Kim, Ilsu ;
    Lee, Yongsung
    2024-05-01 | PDF
    Although the literature on autonomous vehicles (AVs) has been growing with a focus on adoption, expected changes in travel behavior, and travel demand and land use in the future, few studies have analyzed envisioned activities in AVs, which will affect all those outcomes at the micro level. To address this gap, this study examines preferred activit ...
  • Cargo Consolidation Routing and Location Optimization to Reduce Traffic Congestion by Minimizing Commercial Heavy Vehicle Trips
    Cargo Consolidation, Routing, and Location Optimization to Reduce Traffic Congestion by Minimizing Commercial Heavy Vehicle Trips
    Monsreal, Mario ;
    Ozkul, Seckin
    2024-05-01 | PDF
    Commercial heavy vehicles, given their frequency of acceleration and deceleration, impact the traffic stream more than passenger cars, leading to greater congestion on the roads. Mixed-cargo shipments, or cargo consolidation, is an operational strategy that has gained traction in many industries because it reduces transportation costs while increas ...
  • Pedestrian Level of Traffic Stress
    Pedestrian Level of Traffic Stress
    Swift, Sydney ;
    Schneider, Robert J
    2024-05-01 | PDF
    This report presents a Pedestrian Level of Traffic Stress (PLTS) tool that can be used to represent how comfortable pedestrians feel around motor vehicle traffic on roadways. It is a project-scale tool that is typically applied within specific roadway corridors or neighborhood areas. PLTS has two components that assess how stressful it is for pedes ...
  • Cargo Consolidation Routing and Location Optimization to Reduce Traffic Congestion by Minimizing Commercial Heavy Vehicle Trips Brief
    Cargo Consolidation, Routing, and Location Optimization to Reduce Traffic Congestion by Minimizing Commercial Heavy Vehicle Trips [Brief]
    Monsreal, Mario ;
    Ozkul, Seckin
    2024-05-01 | PDF
    Commercial heavy vehicles, given their frequency of acceleration and deceleration, impact the traffic stream more than passenger cars, leading to greater congestion on the roads. Mixed-cargo shipments, or cargo consolidation, is an operational strategy that has gained traction in many industries because it reduces transportation costs while increas ...
  • Barriers to Reducing the Carbon Footprint of Transportation Part 2 Investigating Evolving Travel Behaviors in the PostPandemic Period in California
    Barriers to Reducing the Carbon Footprint of Transportation Part 2: Investigating Evolving Travel Behaviors in the Post-Pandemic Period in California
    Ozbilen, Basar ;
    Gulhare, Siddhartha
    2024-05-01 | PDF
    During the early months of the pandemic, stay-at-home orders and concerns about infection catalyzed a shift toward online activities, such as remote work and e-shopping, resulting in a significant decrease in conventional travel. However, as the effects of the pandemic diminished, the pandemic-induced online activities began to subside, and convent ...
  • Barriers to Reducing the Carbon Footprint of Transportation Part 1 Support to the Clean Miles Standard Policy Making
    Barriers to Reducing the Carbon Footprint of Transportation Part 1: Support to the Clean Miles Standard Policy Making
    Giller, James ;
    Compostella, Junia
    2024-05-01 | PDF
    Transportation Network Companies (TNCs), also referred to as ridehailing companies, have experienced rapid growth in the past decade. This report focuses on the quickly evolving transportation patterns resulting from the adoption of ridehailing as part of the efforts accompanying the implementation of the Clean Miles Standard (CMS) regulation. Base ...
  • Beneficial Reuse of Landfilled Fly Ash in Transportation Infrastructure
    Beneficial Reuse of Landfilled Fly Ash in Transportation Infrastructure
    Shakouri,Mahmoud ;
    Zhang, Chengyi
    2024-05-01 | PDF
    This research explores the influence of thermo-mechanical beneficiation methods on the physicochemical characteristics and reactivity of fly ashes disposed of in landfills (LFAs) obtained from power plants in Wyoming and Colorado, USA. An in-depth assessment was conducted on the mechanical and performance aspects of mortar samples incorporating the ...
  • What Do Americans Think About Federal Tax Options to Support Transportation Results From Year Fifteen of a National Survey
    What Do Americans Think About Federal Tax Options to Support Transportation? Results From Year Fifteen of a National Survey
    Agrawal, Asha Weinstein ;
    Nixon, Hilary
    2024-05-01 | What Do Americans Think About Federal Tax Options to Support Transportation? | PDF
    This report summarizes the results from the fifteenth year of a national public opinion survey asking U.S. adults questions related to their views on federal transportation taxes. A nationally representative sample of 2,522 respondents completed the online survey from February 7 to March 12, 2024. The questions test public opinions about raising th ...
  • What Do Americans Think About Federal Tax Options to Support Transportation Results From Year Fifteen of a National Survey Brief
    What Do Americans Think About Federal Tax Options to Support Transportation? Results From Year Fifteen of a National Survey [Brief]
    Agrawal, Asha Weinstein ;
    Nixon, Hilary
    2024-05-01 | What Do Americans Think About Federal Tax Options to Support Transportation? | PDF
    A nationally representative sample of 2,522 respondents completed the online survey in February and March 2024. The survey collected data on respondents’ opinions about gasoline taxes and mileage fees, views on the quality of their local transportation system, priorities for federal transportation spending, travel behavior habits, and sociodemograp ...
  • Beneficial Reuse of Landfilled Fly Ash in Transportation Infrastructure Research Brief
    Beneficial Reuse of Landfilled Fly Ash in Transportation Infrastructure [Research Brief]
    Shakouri, Mahmoud ;
    Zhang, Chengyi “Charlie”
    2024-05-01 | PDF
    Landfilled fly ash was sampled from the Jim Bridger and Dave Johnson power plants in Wyoming and the Nucla station in Colorado. The chemical and physical properties of these LFAs in their as-received condition were evaluated, and those not conforming to ASTM C618 (the international standard for fly ash used in concrete) requirements underwent mecha ...
  • Exploring Equity Frameworks for a CrossJurisdictional Vehicle Miles Traveled Mitigation Program in Santa Clara County
    Exploring Equity Frameworks for a Cross-Jurisdictional Vehicle Miles Traveled Mitigation Program in Santa Clara County
    Alexander, Serena E ;
    Chen, Luana
    2024-05-01 | PDF
    The Santa Clara Valley Transportation Authority (VTA) partnered with a Mineta Transportation Institute (MTI) research team and San José State University (SJSU) students for assistance in developing the equity framework for the agency’s proposed Equitable Vehicle Miles Traveled (VMT) Mitigation Program. The goal of the program is to reduce the amoun ...
  • Exploring Equity Frameworks for a CrossJurisdictional Vehicle Miles Traveled Mitigation Program in Santa Clara County Research Brief
    Exploring Equity Frameworks for a Cross-Jurisdictional Vehicle Miles Traveled Mitigation Program in Santa Clara County [Research Brief]
    Alexander, Serena E ;
    Chen, Luana
    2024-05-01 | PDF
    The analysis revealed that equity should be incorporated early and at multiple points throughout the program development and implementation phases. From the literature review, best practices identified for developing a program equity framework included defining program equity in a locally relevant way, embedding equity into the project selection pr ...
  • Impervious Surfaces from High Resolution Aerial Imagery Cities in Fresno County
    Impervious Surfaces from High Resolution Aerial Imagery: Cities in Fresno County
    Ahn, Yushin ;
    Poythress, Richard
    2024-05-01 | PDF
    This study investigates impervious surfaces — areas covered by materials with restricted water permeability, such as pavement, sidewalks, and parking lots—due to their crucial role in influencing water dynamics within urban landscapes. The impermeability of these surfaces disrupts natural water absorption processes, resulting in adverse environment ...
  • Impervious Surfaces from High Resolution Aerial Imagery Cities in Fresno County Research Brief
    Impervious Surfaces from High Resolution Aerial Imagery: Cities in Fresno County [Research Brief]
    Ahn, Yushin ;
    Poythress, Richard
    2024-05-01 | PDF
    This research explores the use of various image classification methods on high-resolution aerial imagery to quantify the percentage of urban areas covered by impervious surfaces. Traditional pixel- and object-based classification methods are compared to novel deep learning classification tools.
  • Assessment of Contextual Complexity and Risk Using Unsupervised Clustering Approaches with Dynamic Traffic Condition Data Obtained from Autonomous Vehicles
    Assessment of Contextual Complexity and Risk Using Unsupervised Clustering Approaches with Dynamic Traffic Condition Data Obtained from Autonomous Vehicles
    Ogle, Jennifer H ;
    Bendigeri, Vijay
    2024-05-01 | PDF
    Traditional road safety assessment methodologies rely heavily on AADT (Annual Average Daily Traffic) data estimates to account for variability in traffic operations. Unfortunately, this approach does not consider the driving environment's fast-changing dynamics, which can influence contextual complexity and risk. This research report presents a met ...
  • A Statistical and Machine Learning Approach to Assess Contextual Complexity of the Driving Environment Using Autonomous Vehicle Data Technology Transfer Activities
    A Statistical and Machine Learning Approach to Assess Contextual Complexity of the Driving Environment Using Autonomous Vehicle Data— Technology Transfer Activities
    Ogle, Jennifer H ;
    Bendigeri, Vijay
    2024-05-01 | PDF
    Traditional road safety assessment methodologies rely heavily on AADT (Annual Average Daily Traffic) data estimates to account for variability in traffic operations. Unfortunately, this approach does not consider the driving environment's fast-changing dynamics, which can influence contextual complexity and risk. This research report presents a met ...
861 - 880 / 9353