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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 2681 - 2700 of 36114 results
  • 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 ...
  • Pilot Inservice Performance Evaluation of Cable Barrier in Washington State
    Pilot In-service Performance Evaluation of Cable Barrier in Washington State
    Abbott, Paul ;
    Manchas, Brad
    2022-06-01 | PDF
    A pilot routine in-service performance evaluation (ISPE) was undertaken for cable barrier following the process outlined in NCHRP 22-33. Barrier breach, rollover, vehicle mix, and secondary impacts on the roadside and roadway were evaluated as performance measures using data sourced from the Crash Location & Analysis System (CLAS) database and the ...
  • Establishing Fresh Properties of Fiber Reinforced Concrete for Performance Engineered Mixture PEM
    Establishing Fresh Properties of Fiber Reinforced Concrete for Performance Engineered Mixture (PEM)
    Barman, Manik ;
    Kamara, Alieu
    2022-06-01 | PDF
    The addition of macro or structural fibers into concrete enhances its post-cracking performance. The objective of this study was to conduct a laboratory investigation to determine the influence of structural fibers on the fresh concrete test parameters (Super air meter (SAM) number, V-Kelly index, and Box test rating) recommended for the performanc ...
  • Evaluation of the Nevada DOT Rest Area System Recommendations to Reduce Gaps in Traveler Services
    Evaluation of the Nevada DOT Rest Area System: Recommendations to Reduce Gaps in Traveler Services
    Gates, Timothy J. ;
    Kay, Jonathan
    2022-06-01 | PDF
    Research was conducted to inform decisions related to the system of public rest area facilities owned by the Nevada Department of Transportation (NDOT). The initial steps of the research included collection of data related to the NDOT highway network (including road segment information, traffic volumes, and crashes), NDOT rest areas (including rest ...
  • Deep Learning for Unmonitored Water Level Prediction and Risk Assessment
    Deep Learning for Unmonitored Water Level Prediction and Risk Assessment
    Corns, Steven M ;
    Long, Suzanna K
    2022-06-01 | PDF
    The research uses publicly available data to develop deep learning models to predict river gauge heights at unmonitored locations in Missouri. The geospatial and rainfall data for 20 different catchment areas of Missouri is used in tandem with the clustering and ensemble deep learning approaches to develop a high-performance deep learning model tha ...
  • Workzone Lighting and Glare on Nighttime Construction and Maintenance Activities
    Workzone Lighting and Glare on Nighttime Construction and Maintenance Activities
    Nafakh, Abdullah Jalal ;
    Davila, Franklin Vargas
    2022-06-01 | PDF
    Over the last two decades, an increasing number of highway construction and maintenance projects in the United States have been completed at night to avoid or alleviate traffic congestion delays. Working at night entails several advantages, including lower traffic volumes, less impact on local businesses, cooler temperatures for equipment and mater ...
  • Evaluation of Work Zone Safety Using the SHRP2 Naturalistic Driving Study Data Volume 1 Toolbox of Work Zone Countermeasures
    Evaluation of Work Zone Safety Using the SHRP2 Naturalistic Driving Study Data – Volume 1 Toolbox of Work Zone Countermeasures
    Hallmark, Shauna ;
    Basulto-Elias, Guillermo
    2022-06-01 | PDF
    This toolbox is one of the deliverables for the culmination of several phases of a project, which evaluated driver behavior in work zones using the SHRP2 Naturalistic Driving Study (NDS) data. The toolbox summarizes information about work zone traffic control devices, countermeasures, and work zone features that have a demonstrated impact on speed ...
  • Evaluating the Use of Video Cameras to Estimate Bridge Scour Potential at Four Bridges in Southwestern Montana Fact Sheet
    Evaluating the Use of Video Cameras to Estimate Bridge Scour Potential at Four Bridges in Southwestern Montana [Fact Sheet]
    Armstrong, DW ;
    Holnbeck, Stephen R.
    2022-06-01 | PDF
    The U.S. Geological Survey, in cooperation with the Montana Department of Transportation, installed cameras and large-scale particle image velocimetry (LSPIV) recording equipment at four sites where the U.S. Geological Survey and Montana Department of Transportation are monitoring bridge scour using other methods. Determination of stream velocities ...
  • Development of Superpave 5 Asphalt Mix Designs for Minnesota Pavements
    Development of Superpave 5 Asphalt Mix Designs for Minnesota Pavements
    Yan, Tianhao ;
    Marasteanu, Mihai
    2022-06-01 | PDF
    High field density is desired for improving the durability of asphalt pavements. This research aims to develop Superpave 5 mixtures (more compactable than traditional Superpave mixtures) by using locally available materials to improve the field density in Minnesota. First, previous projects in Minnesota were investigated. The mean and standard devi ...
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