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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 961 - 980 of 9480 results
  • 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 ...
  • 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 ...
  • Exploring Ebikes in the Era of Electrification Toward a More Sustainable and Equitable Transportation System
    Exploring E-bikes in the Era of Electrification: Toward a More Sustainable and Equitable Transportation System
    Sener, Ipek Nese ;
    Higgins, Laura
    2024-05-01 | PDF
    While increasing electrification is vital, additional steps are necessary to maximize its benefits in terms of reducing congestion and promoting sustainable, accessible, and equitable transportation for all. E-bikes, operating at speeds faster than pedal-only bicycles and requiring less physical effort to ride, have the potential to offer transport ...
  • What Do Americans Think About Federal Tax Options to Support Transportation? Results From Year Fifteen of a National Survey [supporting dataset]
    Agrawal, Asha Weinstein ;
    Nixon, Hilary
    2024-05-01 | What Do Americans Think About Federal Tax Options to Support Transportation? | ZIP
    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 ...
    Dataset Supporting Files
  • 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 ...
  • 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 ...
  • Mobility and Safety Impacts of Work Zone Lane and Shoulder Widths Summary
    Mobility and Safety Impacts of Work Zone Lane and Shoulder Widths [Summary]
    Noyce, David A. ;
    Qin, Xiao
    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 ...
  • 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 ...
  • Energy Harvester Tie for Serving the Needs of the Railroad Industry to Access Electric Power in Remote Locations
    Energy Harvester Tie for Serving the Needs of the Railroad Industry to Access Electric Power in Remote Locations
    Ahmadian, Mehdi ;
    Jones, J. Bernard
    2024-05-01 | PDF
    This study proposes various methods to harvest the mechanical energy present in railcar suspensions and railroad tracks to generate low-power electricity that is suitable for onboard or trackside electronics, using electromagnetic generators. A compact electromagnetic energy harvester that can be installed onboard railcars or wayside on railroad tr ...
  • 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 ...
  • 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 ...
  • 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 ...
  • CarpoolBased Parking Assignment Policy Brief
    Carpool-Based Parking Assignment Policy [Brief]
    Rodriguez-Roman, Daniel
    ORCID ICON IMG
    2024-05-01 | PDF
    A new travel demand management (TDM) strategy is proposed that integrates ride-matching and parking management to tackle traffic congestion and air pollution problems that arise when the demand for parking spaces exceeds parking supply. The proposed strategy implements a centralized system that assigns parking spaces, free of out-of-pocket costs, a ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • State of the Practice of Crash Reporting in the US and Implications for CAV Safety Assessment
    State of the Practice of Crash Reporting in the U.S. and Implications for CAV Safety Assessment
    Acharya, Sailesh ;
    Rahman, Md Ashikur
    2024-05-01 | PDF
    This study evaluated connected and autonomous vehicle (CAV) crash reporting practices across the United States, emphasizing the importance of standardized reporting and legislation for the safe deployment of CAVs on public roads. Through a survey of state transportation officials and a review of current practices and legislation, the study identifi ...
  • 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 ...
  • Development of NonProprietary UltraHighPerformance Concrete and Railway Tie Application
    Development of Non-Proprietary Ultra-High-Performance Concrete and Railway Tie Application
    Hasnat, Ariful ;
    Ghafoori, Nader
    2024-05-01 | PDF
    This study reports on properties of non-proprietary ultra-high-performance concretes (UHPCs) for railway ties. The research work is divided into three major phases. The first phase reports on optimization of cementitious materials and aggregates and selection of the most suitable water-to-cementitious materials ratio. In the second phase, the trans ...
961 - 980 / 9480