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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 4261 - 4280 of 36908 results
  • Examining Seniors Adaptation to Mixed Function Automated Vehicles Analysis of Naturalistic Driving Data
    Examining Seniors’ Adaptation to Mixed Function Automated Vehicles: Analysis of Naturalistic Driving Data
    Liang, Dan ;
    Antin, Jonathan F
    2021-02-01 | PDF
    The study examined whether advanced driver assistance systems (ADAS) can benefit the mobility and driving performance of senior drivers. Two groups of driving data, collected separately from two naturalistic driving projects, were examined. The Second Strategic Highway Research Program and the Examining Seniors’ Adaptation to Mixed Function Automat ...
  • Current and Future Best Practices for Pothole Repair in Illinois
    Current and Future Best Practices for Pothole Repair in Illinois
    Hajj, Ramez ;
    Lu, Yujia
    2021-02-01 | PDF
    This report presents a review of flexible pavement pothole-patching materials, equipment, and techniques within Illinois Department of Transportation as well as other transportation agencies in the United States. The research team conducted a literature review to examine recent studies and available state department of transportation guidance on po ...
  • Investigation on Water Quality Impacts of Bridge Stormwater Runoff from Scupper Drains on Receiving Waters
    Investigation on Water Quality Impacts of Bridge Stormwater Runoff from Scupper Drains on Receiving Waters
    Fu, George Yuzhu ;
    Bakr, Ahmed
    2021-02-01 | PDF
    The objectives of this research project were to investigate water quality impacts of bridge stormwater runoff from scupper drains on receiving waters, and to develop an efficient simulation tool so that the Georgia Department of Transportation (GDOT) and the resource agencies can accurately anticipate potential effects and better evaluate whether s ...
  • Testing Methods for the Next Generation of Concrete
    Testing Methods for the Next Generation of Concrete
    Ferraro, Christopher C. ;
    Riding, Kyle A
    2021-02-01 | PDF
    The Florida Department of Transportation is working towards the evaluation of structural portland cement concrete to ensure the service life requirements for concrete structures are met based on material performance. As the industry moves toward performance specifications, there is a need to evaluate the performance of the composite concrete sample ...
  • TruckPlatoonable Pavement Sections in Illinois Network
    Truck-Platoonable Pavement Sections in Illinois’ Network
    Al-Qadi, Imad L ;
    Okte, Egemen
    2021-02-01 | PDF
    Truck platooning has many benefits over traditional truck mobility. Literature shows that platooning improves safety and reduces fuel consumption between 5% and 15% based on platoon configuration. In Illinois, trucks carry more than 50% of freight tonnage and constitute 25% of the traffic on interstates. Deployment of truck platooning within inters ...
  • Association of Traffic and Related Air Pollutants on Cardiorespiratory Risk Factors From LowIncome Populations in El Paso TX
    Association of Traffic and Related Air Pollutants on Cardiorespiratory Risk Factors From Low-Income Populations in El Paso, TX
    Jeon, Soyoung ;
    Aguilera, Juan
    2021-02-01 | PDF
    The health effects of air pollution from outdoor environments are of great concern due to the high exposure risk even at relatively low concentrations of air pollutants. Traffic emissions from the El Paso–Ciudad Juarez border crossings make up a sizable portion of the mobile vehicle emissions in El Paso, TX. This project aimed to integrate air qual ...
  • Do Equity and Accountability Get Lost in LOSTs An Analysis of Local Return Funding Provisions in Californias Local Option Sales Tax Measures for Transportation
    Do Equity and Accountability Get Lost in LOSTs? An Analysis of Local Return Funding Provisions in California’s Local Option Sales Tax Measures for Transportation
    Lederman, Jaimee ;
    Haas, Peter
    2021-02-01 | PDF
    This study explores how local return provisions of local option sales taxes (LOSTs) for transportation are allocated and spent to meet local and regional transportation needs. Local return refers to the component of county LOST measures that provides funding directly to municipalities in the county to be used to meet local needs. Local return has b ...
  • Adoption of Biofuels for the Marine Shipping Industry A LongTerm Price and Scalability Assessment
    Adoption of Biofuels for the Marine Shipping Industry: A Long-Term Price and Scalability Assessment
    Tan, Eric C D ;
    Harris, Kylee
    2021-02-01 | PDF
    One of the biggest challenges in the 21st Century is transforming the transportation sector into a low carbon-based sustainable industry, including maritime shipping. Bioenergy has an essential role in the transition to move maritime shipping toward carbon neutrality. Biomass-derived fuels can undoubtedly play a crucial role in the future of marine ...
  • Phase 4 MnDOT Slope Vulnerability Assessments
    Phase 4 MnDOT Slope Vulnerability Assessments
    Holmstadt, Jen ;
    Bradley, Nick
    2021-02-01 | PDF
    Phase 4 Slope Vulnerability Assessments is a continuation of Phases 1-3 previously conducted by WSB and MnDOT to determine the risk of slope failure along state highways. This phase includes 16 counties located in districts 1 and 3 and the Metro. The three main components of the model are 1) identify past slope failures, 2) model the causative fact ...
  • Macrotexture Assessment of Florida Pavements
    Macrotexture Assessment of Florida Pavements
    Oracheff, Alexander ;
    Fletcher, James H.
    2021-02-01 | PDF
    Regular statewide macrotexture assessments are important for identifying hydroplane safety concerns on roadways. Traditionally, vehicle-mounted point-laser devices have been used by the Florida Department of Transportation (FDOT) State Materials Office to measure network-level macrotexture in accordance with the ASTM E1845 test standard. These poin ...
  • How and Why Would Congestion Pricing Work
    How and Why Would Congestion Pricing Work?
    Manville, Michael
    ORCID ICON IMG
    2021-02-01 | PDF
    Transportation scholars regularly argue that congestion pricing is the only reliable way to reduce road traffic congestion. The public often resists this advice, often out of confusion about how pricing would work, concern about whether it would be fair, and a belief that some other, less politically explosive approach might work just as well. This ...
  • DataBased Testing Decision Process for Traffic Signal Steel Replacement
    Data-Based Testing & Decision Process for Traffic Signal Steel Replacement
    Sorensen, Andrew D. ;
    Unobe, Ikwulono David
    2021-02-01 | PDF
    A process to estimate the fatigue damage and life expectancy of traffic signal structures under wind loads is presented. Wind speed histories of locations, where these structures are installed, are developed using wind speed data from stations located around the state. These speeds are used in computing fatigue damage at the welded connections at t ...
  • Comparison of ASTM Standards for the Evaluation of Geogrid Strength
    Comparison of ASTM Standards for the Evaluation of Geogrid Strength
    El-Hajjar, Rani F ;
    Titi, Hani H.
    2021-02-01 | PDF
    In this project we investigate the application of ASTM D4595, ASTM D6637 and ASTM D7737 on geogrids from more than 9 geogrid manufacturers supplying materials for Wisconsin DOT projects. The objective was to determine minimum standard guidelines that can be used in practice based on ASTM D6637 and what can be learned from the junction strength beha ...
  • Evaluating Reserve Strength of Girder Bridges Due to Bridge Rail Load Shedding
    Evaluating Reserve Strength of Girder Bridges Due to Bridge Rail Load Shedding
    Wang, Yao ;
    Tumbeva, Mirela D
    2021-02-01 | PDF
    This research experimentally and numerically evaluated the reserve strength of girder bridges due to bridge rail load shedding. The investigation included: (1) performing non-destructive field testing on two steel girder bridges and one prestressed concrete girder bridge, (2) developing validated finite element numerical models, and (3) performing ...
  • Do Equity and Accountability Get Lost in LOSTs? An Analysis of Local Return Funding Provisions in California’s Local Option Sales Tax Measures for Transportation [supporting datasets]
    Lederman, Jaimee ;
    Haas, Peter
    2021-02-01 | PDF
    This study explores how local return provisions of local option sales taxes (LOSTs) for transportation are allocated and spent to meet local and regional transportation needs. Local return refers to the component of county LOST measures that provides funding directly to municipalities in the county to be used to meet local needs. Local return has b ...
    Dataset Supporting Files
  • Development of Concrete Material Property Database for Pavement ME Input
    Development of Concrete Material Property Database for Pavement ME Input
    Kim, S Sonny ;
    Durham, Stephan A.
    2021-02-01 | PDF
    The Georgia Department of Transportation (GDOT) has been moving toward using the Mechanistic–Empirical Pavement Design Guide (MEPDG), which deploys mechanistic and mathematical principles to analyze the material behaviors. For the smooth transition to this updated pavement design approach for rigid pavement design, GDOT has been developing a statew ...
  • Commercial Drivers License Prosecution Adjudication and Data Transmission
    Commercial Driver’s License Prosecution, Adjudication, and Data Transmission
    Martin, Andrew ;
    Koo, Jeeyen
    2021-02-01 | PDF
    The Kentucky Transportation Center research team examined law enforcement and adjudication of traffic offenses committed by commercial driver’s license holders. The objectives were to identify states that would provide the data, collect information about their court systems, analyze enforcement and/or adjudication data, and make some general observ ...
  • Intelligent Driving Intelligence Test for Autonomous Vehicles with Naturalistic and Adversarial Environment
    Intelligent Driving Intelligence Test for Autonomous Vehicles with Naturalistic and Adversarial Environment
    Feng, Shuo ;
    Yan, Xintao
    2021-02-01 | PDF
    Driving intelligence tests are critical to the development and deployment of autonomous vehicles. The prevailing approach tests autonomous vehicles in life-like simulations of the naturalistic driving environment. However, due to the high dimensionality of the environment and the rareness of safety-critical events, hundreds of millions of miles wou ...
  • InSitu Monitoring of InfiltrationInduced Instability of I70 Embankment West of the EisenhowerJohnson Memorial Tunnels Phase III
    In-Situ Monitoring of Infiltration-Induced Instability of I-70 Embankment West of the Eisenhower-Johnson Memorial Tunnels, Phase III
    Wayllace, Alexandra ;
    Lu, Ning
    2021-02-01 | PDF
    A new methodology that uses recent advances in unsaturated soil mechanics and hydrology was developed and tested. The approach consists of using soil suction and moisture content field information in the prediction of the likelihood of landslide movement. The testing ground was an active landslide on I-70 west of the Eisenhower/Johnson Memorial Tun ...
  • Adaptive Signal System Safety Impacts
    Adaptive Signal System Safety Impacts
    Chowdhury, Mashrur ;
    Huynh, Nathan
    2021-02-01 | PDF
    The research team conducted a literature review and a nation-wide survey at the beginning of the research. The literature review revealed that Adaptive Signal Control System (ASCS) was effective in reducing crashes in some studies, while in other studies, the crash reduction due to ASCS was not statistically significant. Twenty-eight states partici ...
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