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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 2581 - 2600 of 35909 results
  • Synthesis of Galvanized Steel Reinforcement Corrosion Performance
    Synthesis of Galvanized Steel Reinforcement Corrosion Performance
    Sagüés, Alberto A. ;
    Alexander, Christopher L
    2022-06-23 | PDF
    Hot dipped galvanized steel rebar (HDGR) is an alternative to plain carbon steel often considered for concrete reinforcement. The zinc rich layer serves as a sacrificial coating protecting the underlying carbon steel. While there is information reporting benefits from increased chloride threshold and reduced corrosion rates, there is also uncertain ...
  • Coordinating State Policies Laws and Regulations for Automated Driving Systems Across New England
    Coordinating State Policies, Laws, and Regulations for Automated Driving Systems Across New England
    Rodriguez, Greg ;
    McGrane, Ann
    2022-06-22 | PDF
    This project sought to develop a coordinated and consistent multi-state approach to the setting of policies, laws, and regulations within the New England region to support the seamless operation of ADS-equipped vehicles across the New England states.
  • Phased Construction Bridges Monitoring and Analysis for TrafficInduced Vibration
    Phased Construction Bridges: Monitoring and Analysis for Traffic-Induced Vibration
    Alkady, Khalid ;
    Wittich, Christine E
    2022-06-21 | PDF
    Phased construction is a common technique utilized to allow bridges to remain partially open to traffic throughout the construction process. The segment of the bridge deck that is constructed second cures under the effect of traffic-induced vibration transmitted from the adjacent bridge-deck segment, which is open to traffic. However, subjecting br ...
  • Effects of Concrete Cure Time on Epoxy Overlay and Sealant Performance
    Effects of Concrete Cure Time on Epoxy Overlay and Sealant Performance
    Attanayake, Upul ;
    Berke, Neil
    2022-06-15 | PDF
    Applying flood coats (thin epoxy overlays and healer sealers) improves bridge deck condition and extends service life. The current Michigan Department of Transportation (MDOT) policy is to maintain a total curing period comprising 28 days of wet and dry curing before applying a flood coat on bridge decks with new concrete for patches and repairs. C ...
  • AgBased Deicing Additives
    Ag-Based Deicing Additives
    Fay, Laura ;
    Bell, Matthew
    2022-06-01 | PDF
    The objective of this project is to assist Colorado Department of Transportation (CDOT) in the identification of regionally sourced agricultural co- or by-product deicer additives that will enhance corrosion protection and provide added deicing performance and longevity to road surfaces. A literature review provides a summary of agriculturally deri ...
  • Strategies To Reduce BurroVehicle Collisions in the Lake Pleasant Area
    Strategies To Reduce Burro-Vehicle Collisions in the Lake Pleasant Area
    Gagnon, Jeffrey W. ;
    Beach, Colin A.
    2022-06-01 | PDF
    Burro-vehicle collisions (BVCs) have the potential to cause motorist fatalities, injuries, and property damage. The Lake Pleasant area north of Phoenix, Arizona, has reported high BVC rates on highways within and around the Lake Pleasant Herd Management Area (LPHMA). Although interactions between wildlife and highways and specifications for wildlif ...
  • Bridge Project Prioritization for Kentucky 2022
    Bridge Project Prioritization [for Kentucky, 2022]
    Gibson, Bryan ;
    Van Dyke, Chris
    2022-06-01 | PDF
    Kentucky’s 14,000+ bridges are key nodes within the state’s surface transportation network. They facilitate the movement of freight, commercial vehicles, and personal vehicles alike. Historically, the Kentucky Transportation Cabinet (KYTC) has prioritized bridge maintenance projects using sufficiency ratings. These ratings are based on three factor ...
  • RiskBased Project Development
    Risk-Based Project Development
    Waddle, Steven ;
    Li, Ying
    2022-06-01 | PDF
    Risk management is integral to highway project development. Managing risk entails identifying uncertainties which could influence project activities, understanding how they can be mitigated or eliminated, and monitoring risk during project development. Many state transportation agencies have introduced methods for identifying risks, determining whe ...
  • Testing the Hurricane Evacuation Modeling Package HEMP Research Project Capsule 223SS
    Testing the Hurricane Evacuation Modeling Package (HEMP): Research Project Capsule [22–3SS]
    Bian, Ruijie “Rebecca” ;
    Rupnow, Tyson
    2022-06-01 | PDF
    This project focuses on testing Hurricane Evacuation Modeling Package (HEMP) in different storm scenarios and improving its performance. Objectives include: (1) Improve and validate prediction accuracy of HEMP; (2) Improve HEMP’s fitness to actual emergency operations in Louisiana; (3) Improve HEMP’s computation speed; and (4) Explore potential enh ...
  • Understanding the Impact of Charging Infrastructure on the Consideration to Purchase an Electric Vehicle in California
    Understanding the Impact of Charging Infrastructure on the Consideration to Purchase an Electric Vehicle in California
    Hoogland, Kelly ;
    Kurani, Kenneth S.
    2022-06-01 | PDF
    This research makes explicit and tests an implicit assumption in policies promoting public investment in plug-in electric vehicle (PEV) charging infrastructure: even people who are not already interested in PEVs see public PEV charging. Data from a survey representing all car-owning households in California are combined with per capita counts of pu ...
    Supporting Files
  • Pavement Life Cycle Inventories for California Models and Data Development in the Last Decade for Caltrans
    Pavement Life Cycle Inventories for California: Models and Data Development in the Last Decade for Caltrans
    Saboori, Arash ;
    Butt, Ali A
    2022-06-01 | PDF
    This technical memorandum documents the details and assumptions used to develop the University of California Pavement Research Center (UCPRC) life cycle inventory (LCI) database for quantifying the environmental impacts of California pavement projects, as well as some impacts from building heating, cooling, and lighting. The UCPRC LCI database pres ...
  • Evaluating the Performance of Pavement Surface Treatments on Arizona Highways
    Evaluating the Performance of Pavement Surface Treatments on Arizona Highways
    Peshkin, David G. ;
    Ram, Prashant V
    2022-06-01 | PDF
    This report presents a framework for long-term monitoring and evaluation of Arizona pavement surface treatments. The framework shows how to use constructed projects and existing monitoring methods to improve pavement preservation project and treatment selection as well as to model the performance of pavement preservation. The report also presents a ...
  • Develop Surface Aggregate Classification of Reclaimed Asphalt Pavement Technical Report
    Develop Surface Aggregate Classification of Reclaimed Asphalt Pavement: Technical Report
    Hu, Sheng ;
    Zhou, Fujie
    2022-06-01 | PDF
    Pavement skid resistance is critical for public safety in wet-weather conditions. To improve pavement skid resistance, the use of Surface Aggregate Classification A (SAC-A) aggregate has increased significantly each year to meet the friction demand of pavements. Texas Department of Transportation specifications allow for the use of reclaimed asphal ...
  • Air Mobility Trajectory Anomaly Detection and Operational Advancement
    Air Mobility Trajectory Anomaly Detection and Operational Advancement
    Sacharny, David ;
    Henderson, Thomas
    2022-06-01 | PDF
    The density of aircraft operating in the Salt Lake valley over the next several years is projected to explode in density and therefore push the complexity of air traffic operations beyond the ability of human air traffic controllers. Despite the progress made by NASA and industry during the AAM X3 simulation activities, a cohesive model of air trav ...
  • Bigdata Analytics and Artificial Intelligence for Smart Intersections
    Bigdata Analytics and Artificial Intelligence for Smart Intersections
    Banerjee, Tania ;
    Chen, Ke
    2022-06-01 | PDF
    This project aims to develop a multi-sensor system for vehicle and pedestrian traffic analysis at traffic intersections. The techniques developed as part of this project are used to process data streams from video-camera and LIDAR systems installed at traffic intersections (along with the loop detector data captured by advanced traffic controllers) ...
  • Lessons from Cities Considering Congestion Pricing
    Lessons from Cities Considering Congestion Pricing
    Colner,, Jonathan P ;
    D’Agostino, Mollie Cohen
    2022-06-01 | PDF
    Congestion pricing (CP) is widely considered to have significant potential for effectively reducing vehicle miles traveled, reducing emissions, and providing a reliable revenue source for transportation investments. This study evaluated cities interested in CP—five in the U.S. (Boston, Los Angeles, New York, San Francisco, Seattle) and two in other ...
  • M107 Outdoor Laboratory and Testbed for Bridge Health
    M107: Outdoor Laboratory and Testbed for Bridge Health
    Wood, Richard L. ;
    Nasimi, Mitra
    2022-06-01 | PDF
    Due to the aging problem of bridges and the limited financial resources in the United States, it is necessary to form a deeper understanding of existing, aging bridges in an effort to extend their in-service life. To address this problem, researchers from the University of Nebraska-Lincoln (UNL) and engineers from the Nebraska Department of Transpo ...
  • Safety and Mobility Analysis of Rolling Slowdown for Work Zones Comparison with Full Closure
    Safety and Mobility Analysis of Rolling Slowdown for Work Zones: Comparison with Full Closure
    Nafakh, Abdullah Jalal ;
    Davila, Franklin Vargas
    2022-06-01 | PDF
    There are times when the traffic lanes through a work zone must be kept clear for activities such as placing overhead beams, erecting overhead signs, and installing power lines, and other temporary roadway work activities. As an alternative to a full road closure, a rolling slowdown can typically provide up to 30 minutes to complete such activities ...
  • Updating the Bridge Construction Cost Database
    Updating the Bridge Construction Cost Database
    Catchings, Rachel ;
    Li, Ying
    2022-06-01 | PDF
    Adopting a comprehensive suite of methods to track, analyze, and maintain data on bridge construction costs can help state transportation agencies identify and implement strategies to mitigate the influence of factors which escalate project costs. This report discusses how the Kentucky Transportation Cabinet (KYTC) should approach updating, maintai ...
  • Extended Weight Systems Pavement Analysis
    Extended Weight Systems Pavement Analysis
    Marks, P Gayle ;
    Wilcoxson, Jon
    2022-06-01 | PDF
    Kentucky established its Extended Weight Coal or Coal By-products Haul Road System (EWCHRS) in 1986. This road network includes segments of the Coal Haul Highway System on which more than 50,000 tons coal or coal byproducts were transported by motor vehicles during the previous calendar year. In the past few years, the state has introduced extended ...
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