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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 3821 - 3840 of 36011 results
  • Road Pavement Condition Monitoring by Embedded Crowdsensing
    Road Pavement Condition Monitoring by Embedded Crowdsensing
    Cheng, Liang
    ORCID ICON IMG
    2021-02-27 | PDF
    This project investigates the design, implementation, and testing of a crowdsensing-based system that allows for pavement condition monitoring in a low-cost, reliable, and rapid manner. It also studies the incentive mechanisms for pavement crowdsensing that properly stimulate users to complete sensing tasks within the budget of platform cost and ov ...
  • Reducing Erosion Susceptibility of Coastal Highways Using BiologicallyBased Methods
    Reducing Erosion Susceptibility of Coastal Highways Using Biologically-Based Methods
    Montoya, Brina M.
    2021-02-22 | PDF
    Roadbeds supporting coastal highways in North Carolina (e.g., Highway 12) are susceptible to erosion during large storm events. Reinforcing vulnerable coastal subgrades and slopes can reduced the erosion potential and the coastal infrastructure can be maintained. Bio-mediated soil improvement methods can be used to stiffen sandy subgrade and slopes ...
  • Modern Project Prioritization for Transportation Investments
    Modern Project Prioritization for Transportation Investments
    Noyce, David A. ;
    McCahill, Chris
    2021-02-17 | PDF
    Project prioritization among transportation agencies has always been an evolving practice. At its core, it means setting goals and aligning decision-making processes to meet those goals. This study is aimed at making that process easier. For this study, our team reviewed project prioritization programs at 21 transportation agencies, including 14 st ...
  • A Comprehensive Program To Support Parents of New Teen Drivers
    A Comprehensive Program To Support Parents of New Teen Drivers
    Goodwin, Arthur ;
    O'Brien, Natalie P.
    2021-02-12 | PDF
    The objective of this project was to create a comprehensive program, called Time to Drive, to support parents of beginning drivers in North Carolina. The program provides critical guidance to parents at various points in the licensing process when this guidance is most needed. Time to Drive includes: • An in-person parent coaching session that enco ...
  • Integration of Automated Vehicle Sensing with Adaptive Signal Control for Enhanced Mobility [supporting datasets]
    Smith, Stephen F. ;
    Hawkes, Allen
    2021-02-04 | XLSX
    This repository contains the results produced by CMU-UTC Project 294, titled "Integration of Autonomous Vehicles with Adaptive Signal Control to Enhance Mobility." The data contains comparative results of a pilot experiment designed to demonstrate the traffic flow efficiency can be improved by vehicle-to-infrastructure communication and use of vehi ...
    Dataset Supporting Files
  • Improvement of Climate Data for Use in MEPDG Calibration and Other Pavement Analysis Phase II
    Improvement of Climate Data for Use in MEPDG Calibration and Other Pavement Analysis – Phase II
    Durham, Stephan A. ;
    Cetin, Bora
    2021-02-01 | PDF
    Pavement temperature is one of the most important parameters that influence pavement performance. In the Pavement ME Design (PMED) software, the pavement temperatures are determined based on the shortwave radiation (SWR) and longwave radiation (LWR) models. In this project, the accuracy of such radiation models is assessed. The PMED-recommended net ...
  • Optimizing Winter Roadway Treatments for Georgia Pavements
    Optimizing Winter Roadway Treatments for Georgia Pavements
    Shen, Junan ;
    Yang, Xiaoming
    2021-02-01 | PDF
    The purpose of this project is to optimize the current practice of winter roadway treatments in Georgia by evaluating the efficiency of deicers commonly used by GDOT (i.e., sodium chloride and calcium chloride) on deicing and anti-icing and the effects of these deicers on pavement materials. To this end, the freezing point, penetration capability, ...
  • 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 ...
  • Data Mining Twitter To Improve Automated Vehicle Safety
    Data Mining Twitter To Improve Automated Vehicle Safety
    McDonald, Tony ;
    Huang, Bert
    2021-02-01 | PDF
    Automated vehicle (AV) technologies may significantly improve driving safety, but only if they are widely adopted and used appropriately. Adoption and appropriate use are influenced by user expectations, which are increasingly being driven by social media. In the context of AVs, prior studies have observed that major news events such as crashes and ...
  • 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 ...
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