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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 1441 - 1460 of 35452 results
  • Snowplow Route Optimization for the Kansas Roadway System Technical Summary
    Snowplow Route Optimization for the Kansas Roadway System [Technical Summary]
    Tran, Dan ;
    Nguyen, Phuong
    2023-09-01 | PDF
    The objective of this project was to develop a snowplow truck route optimization plan for one district (District 4) to help KDOT enhance snow removal efficiency by justifying the fleet size and efficiently allocating limited resources while maintaining roadway safety and reliability.
  • Update the Pile Design by CPT Software to Incorporate Newly Developed PileCPT Methods and Other Design Features
    Update the Pile Design by CPT Software to Incorporate Newly Developed Pile-CPT Methods and Other Design Features
    Abu-Farsakh, Murad ;
    Amirmojahedi, Mohsen
    2023-09-01 | PDF
    This study presents the performance evaluation of 21 direct pile-CPT methods for estimating the ultimate load carrying capacity of square precast prestressed concrete (PPC) piles driven into Louisiana soils utilizing the cone penetration test (CPT) data. The investigated methods are: Schmertmann, De Ruiter and Beringen, Bustamante and Gianeselli (L ...
  • Analysis of Benefits of UDOTs Expanded Incident Management Team Program
    Analysis of Benefits of UDOT’s Expanded Incident Management Team Program
    Schultz, Grant G. ;
    Hyer, Joel
    2023-09-01 | PDF
    In 2019, the Utah Department of Transportation (UDOT) funded a research study evaluating the performance measures of UDOT’s expanded Incident Management Team (IMT) program. The number of IMTs patrolling Utah roadways increased from 13 to 25 between 2018 and 2020. Crash data were collected from the Utah Highway Patrol’s Computer Aided Dispatch datab ...
  • Impact of Urban Speed Limit Changes on Driving Speeds Technical Summary
    Impact of Urban Speed Limit Changes on Driving Speeds [Technical Summary]
    Davis, Gary A. ;
    Lund, Victor
    2023-09-01 | PDF
    Speed limits are a popular safety measure used in urban areas. A new analysis that monitored driving speeds before and after posted changes to speed limits reveals lower speed limits may not, at least initially, cause drivers to slow down.
  • Using SeverityWeighted Risk Scores To Prioritize Safety Funding in Utah
    Using Severity-Weighted Risk Scores To Prioritize Safety Funding in Utah
    Schultz, Grant G. ;
    Aristizabal, Tomas Barriga
    2023-09-01 | PDF
    Budgets for transportation improvements are limited so it is important for governments to focus on improving locations most in need of safety funding. The objective of the Two-Output Model for Safety (TOMS) is to provide the Utah Department of Transportation (UDOT) with a reliable method to prioritize safety improvements on state-owned roadways amo ...
  • Estimating PeakFlow Quantiles for Selected Annual Exceedance Probabilities in Illinois
    Estimating Peak-Flow Quantiles for Selected Annual Exceedance Probabilities in Illinois
    Over, Thomas M. ;
    Marti, Mackenzie K
    2023-09-01 | PDF
    This report presents the methods, results, and applications of an updated flood-frequency study for the State of Illinois. This study, which uses data through September 2017, updates two previous studies that used data through 1999 and 2009, respectively. Flood-frequency estimates are used for a variety of land-use planning and infrastructure desig ...
  • Evaluating Michigans Ferry Services Funding and Policies to Support Island Access Research Spotlight
    Evaluating Michigan’s Ferry Services, Funding and Policies to Support Island Access [Research Spotlight]
    Zockaie, Ali ;
    Shultz, Valerie
    2023-09-01 | PDF
    The Michigan Department of Transportation (MDOT) oversees ferry service for Michigan’s islands as part of its mission to provide safe and equitable access to state residents. To identify ways to improve service to island residents now and in the future, MDOT sought a more comprehensive understanding of the critical aspects of ferry service. This re ...
  • An Evaluation of Wildlife Crossing Design Placement Costs and Funding Opportunities for Corridor Q
    An Evaluation of Wildlife Crossing Design, Placement, Costs, and Funding Opportunities for Corridor Q
    Donaldson, Bridget M ;
    Hillard, Elizabeth M
    2023-09-01 | PDF
    Construction is underway along Corridor Q, a 14-mile section of highway in Southwest Virginia that will open to traffic in stages from 2023 to 2027. Preliminary data indicated that a newly established reintroduced herd of elk regularly travels on and alongside the partially constructed road. The purpose of this study was to determine potential desi ...
  • Inspection Training Course on Bridge Preventive Maintenance Activities
    Inspection Training Course on Bridge Preventive Maintenance Activities
    Wells, Danny ;
    Palle, Sudhir
    2023-09-01 | PDF
    Despite over 30 percent of bridges in the United States having exceeded their 50-year design lives, most state departments of transportation (DOTs) lack the funding needed to replace bridges on a large scale. In response, agencies have increasingly turned to bridge preventive maintenance activities to prolong bridge service lives. These activities ...
  • Connected and Automated Future of Transportation for Kansas
    Connected and Automated Future of Transportation for Kansas
    Aziz, H.M. Abdul ;
    Islam, A.M. Hasibul
    2023-09-01 | PDF
    The connected and automated vehicle (CAV) technologies will bring unprecedented changes in the landscape of transportation systems for areas like operations, management, and infrastructure needs. To assure a safe, reliable, and trustworthy connected and automated transportation system, it is important to have a clear CAV implementation pathway that ...
  • Connected and Automated Future of Transportation for Kansas Technical Summary
    Connected and Automated Future of Transportation for Kansas [Technical Summary]
    Aziz, H.M. Abdul ;
    Islam, A.M. Hasibul
    2023-09-01 | PDF
    The connected and automated vehicle (CAV) technologies will bring unprecedented changes in the landscape of transportation systems for areas like operations, management, and infrastructure needs. To assure a safe, reliable, and trustworthy connected and automated transportation system, it is important to have a clear CAV implementation pathway that ...
  • STAR InRoad Electric Vehicle Charging for Parked Vehicles
    STAR In-Road Electric Vehicle Charging for Parked Vehicles
    Abdulhamed, Bilal ;
    Alavizadeh, Hootan
    2023-09-01 | PDF
    This report documents the work conducted as a multi-disciplinary project on the wireless charging of parked Electrical Vehicles (EVs) by Wright State University and supported by the Ohio Department of Transportation (ODOT). This document summarizes our progress on a wide variety of topics, including 1) in-house software to read and label the open-s ...
  • STAR InRoad Electric Vehicle Charging for Parked Vehicles Fact Sheet
    STAR In-Road Electric Vehicle Charging for Parked Vehicles [Fact Sheet]
    Abdulhamed, Bilal ;
    Alavizadeh, Hootan
    2023-09-01 | PDF
    The global electric vehicle (EV) market is forecasted to grow by 24.3% till 2028 constantly. However, the development in charging infrastructure is still lagging behind that, hindering the EV's widespread application, i.e., 30 million chargers are still needed to support the existing EV demand. Also, based on the survey by Witricity, 86% of EV owne ...
  • Connected Vehicle Application Development
    Connected Vehicle Application Development
    Zhou, Kun
    2023-09-01 | PDF
    Connected Vehicle (CV) communication technology (i.e., Vehicle-to-Everything, V2X) enables vehicles to "talk" to other vehicles on the road (Vehicle-to-Vehicle, V2V), roadside infrastructure (Vehicle-to-Infrastructure, V2I), vulnerable road users (Vehicle-to-Pedestrian, V2P), and the "cloud" (vehicle-to-network, V2N). The V2X connectivity will prov ...
  • Efficacy Costs and Impacts of NonChloride Deicers An Educational Primer and Product Information Sheets
    Efficacy, Costs, and Impacts of Non-Chloride Deicers: An Educational Primer and Product Information Sheets
    Fay, Laura ;
    Clouser, Karalyn
    2023-09-01 | PDF
    The objective of this project was to synthesize available information on non-chloride deicers to allow for a more comprehensive understanding by winter roadway maintenance professionals and allow for easy comparisons between products and with sodium chloride (as salt brine or rock salt). This was accomplished through a literature search that summar ...
  • Next Generation LifeCycle Cost Analysis Tool for Bridges in Iowa Phase II
    Next Generation Life-Cycle Cost Analysis Tool for Bridges in Iowa – Phase II
    Alipour, Alice ;
    Shafei, Behrouz
    2023-09-01 | PDF
    To meet the requirements of the Moving Ahead for Progress in the 21st Century (MAP-21) Act of 2012, a life-cycle cost analysis management (LCCAM) tool was developed to manage the maintenance actions of the portion of National Highway System (NHS) for the Iowa Department of Transportation (DOT). The LCCAM software that was developed with the coopera ...
  • Next Generation LifeCycle Cost Analysis Tool for Bridges in Iowa Phase II Tech Transfer Summary
    Next Generation Life-Cycle Cost Analysis Tool for Bridges in Iowa – Phase II [Tech Transfer Summary]
    Alipour, Alice ;
    Shafei, Behrouz
    2023-09-01 | PDF
    The overarching goal of this project was to upgrade the life-cycle cost analysis management (LCCAM) software tool for continued use by the Iowa Department of Transportation (DOT). Specific objectives were as follows: • Integrate road user cost calculations into the software without disrupting the current maintenance management procedure for bridge ...
  • Design and Behavior of Seamless BridgePavement Systems
    Design and Behavior of Seamless Bridge-Pavement Systems
    Chen, Xiaoyi ;
    Malviya, Jay
    2023-09-01 | PDF
    The seamless bridge concept eliminates expansion joints on the bridge deck and joints between the bridge and approach, which can significantly reduce the maintenance costs and improve the long-term durability of the primary load-carrying components. Past applications of seamless bridges have utilized Continuously Reinforced Concrete Pavement (CRCP) ...
  • Leveraging Artificial Intelligence AI Techniques to Detect Forecast and Manage Freeway Congestion Technical Report
    Leveraging Artificial Intelligence (AI) Techniques to Detect, Forecast, and Manage Freeway Congestion: Technical Report
    Das, Subasish ;
    Tsapakis, Ioannis
    2023-09-01 | PDF
    Enhancing the quality and efficiency of the Texas surface transportation system necessitates reliable predictions about the initiation and dispersion of prolonged congestion, as well as effective tracking of atypical events and their potential evolution. Artificial intelligence (AI) offers a unique avenue for achieving these goals, presenting an op ...
  • Artificial Intelligence AI Based Tool to Estimate Contact Time
    Artificial Intelligence (AI) Based Tool to Estimate Contact Time
    Jeong, H David ;
    Alikhani, Hamed
    2023-09-01 | PDF
    MDT is in the process of modernizing their contract time determination processes by developing user-friendly tools to facilitate the estimation process of project duration and contract time. As part of this modernization effort, a top-down project duration estimation tool was developed in this research project. This tool is particularly useful when ...
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