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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 4341 - 4360 of 36908 results
  • Local Climate Action Planning as a Tool to Harness the Greenhouse Gas Emissions Mitigation and Equity Potential of Autonomous Vehicles and OnDemand Mobility
    Local Climate Action Planning as a Tool to Harness the Greenhouse Gas Emissions Mitigation and Equity Potential of Autonomous Vehicles and On-Demand Mobility
    Alexander, Serena ;
    Agrawal, Asha Weinstein
    2021-01-01 | PDF
    This report focuses on how cities can use climate action plans (CAPs) to ensure that on-demand mobility and autonomous vehicles (AVs) help reduce, rather than increase, green-house gas (GHG) emissions and inequitable impacts from the transportation system. The authors employed a three-pronged research strategy involving: (1) an analysis of the curr ...
  • Validation of Tsunami Design Guidelines for Coastal Bridges
    Validation of Tsunami Design Guidelines for Coastal Bridges
    Lynett, Patrick ;
    Thio, Hong Kie
    2021-01-01 | PDF
    This paper details a Transportation Pooled Fund Study, TPF-5(307), that included Alaska, California, Hawaii, Oregon (lead state), Washington, and the Federal Highway Administration. The research goal was to update guidelines as a foundation for review by the respective AASHTO sub-committee(s). This report focused on bridges for the Western United S ...
  • Targeted Investment for Food Access
    Targeted Investment for Food Access
    Novak, David C. ;
    Sullivan, James L.
    2021-01-01 | PDF
    This project focuses on modeling access to food locations by identifying the most critical roadway links in a transportation network. This project extends the Critical Closeness Accessibility (CCA) measure developed by Novak and Sullivan (2014) to identify the roadway infrastructure components that are most critical with respect to food accessibili ...
  • Evaluation of SilicaBased Materials for Use in Portland Cement Concrete
    Evaluation of Silica-Based Materials for Use in Portland Cement Concrete
    Ferraro, Christopher C. ;
    Paris, Jerry M.
    2021-01-01 | PDF
    The purpose of this research was to evaluate the mechanical performance and long-term durability of concrete containing alternative supplementary cementitious materials (ASCM) available in the state of Florida that were identified in a previous research project (FDOT BDV-31-977-06) as warranting further investigation. The ASCM chosen were two types ...
  • Measuring Dispersal and Tracking of AntiIcing and Deicing Chemicals by Using InSitu Spectral Data Phase II
    Measuring Dispersal and Tracking of Anti-Icing and Deicing Chemicals by Using In-Situ Spectral Data – Phase II
    Belz, Nathan ;
    Fulton, Gabriel
    2021-01-01 | PDF
    The use and application of salt, sand and related mixtures and derivatives have proved to be highly effective for removing or controlling the development of ice on the roadway surface. Although ample research has indicated the way in which application method, application rate, and efficacy of mix contents can vary depending on temperature and surfa ...
  • TrafficRelated Air Pollution and Childhood Asthma in the United States A Burden of Disease Assessment
    Traffic-Related Air Pollution and Childhood Asthma in the United States: A Burden of Disease Assessment
    Khreis, Haneen ;
    Alotaibi, Raed
    2021-01-01 | PDF
    Asthma is one of the leading chronic airway diseases among children in the United States and across the world. Emerging evidence indicates that traffic-related air pollution leads to the onset of childhood asthma. In this work, the researchers estimated the number of incident asthma cases among children attributable to three common traffic-related ...
  • Bicycle and Pedestrian Counting Resources
    Bicycle and Pedestrian Counting Resources
    Texas A&M Transportation Institute
    2021-01-01 | PDF
    The Bicycle and Pedestrian Program has compiled a set of resources to answer your questions about nonmotorized counting, from site selection and counter setup to quality control and data uses.
  • North Coast Hiawatha Restoration A Solid Return for Taxpayers and Business
    North Coast Hiawatha Restoration: A Solid Return for Taxpayers and Business
    Mathews, Jim ;
    Aiello, Joseph
    2021-01-01 | PDF
    Rail Passengers assesses that restoring the North Coast Hiawatha as a daily Amtrak service would generate $271 million each year in economic benefits to the seven states served while costing Amtrak roughly $68 million per year to operate – a cost offset 66% by collection of $41 million each year in fares and other customer revenue. As many as 426,0 ...
  • ESRI Insights Phase II The War Room
    ESRI Insights Phase II: The War Room
    Moser, Andrea ;
    Wells, Kevin
    2021-01-01 | PDF
    UDOT is developing a dashboard that can display information for winter storm events. This project is focused on creating a one-stop shop for decision-making tools and will serve to inform operations managers, who will be making decisions based on feedback from the dashboards. The recommendations this report makes will help the Maintenance Operation ...
  • PostFire Assessment of Prestressed Concrete Bridges in Indiana
    Post-Fire Assessment of Prestressed Concrete Bridges in Indiana
    Varma, Amit H. ;
    Olek, Jan
    2021-01-01 | PDF
    This project focused on evaluating the effects of fire-induced damage on concrete bridge elements, including prestressed concrete bridge girders. A series of controlled heating experiments, pool fire tests, material tests, and structural loading tests were conducted. Experimental results indicate that the portion of concrete subjected to temperatur ...
  • Behavior and Repair of Corroded Steel HPiles
    Behavior and Repair of Corroded Steel H-Piles
    Abdulazeez, Mohanad M ;
    Ramadan, Amro
    2021-01-01 | PDF
    This report summarizes the details of experimental work and finite element modeling conducted to evaluate: 1) the remaining axial capacity of H-piles having different corrosion severity and extension levels, and 2) the performance of repaired corroded H-piles. Seventeen full-scale H-piles were investigated under concentric and eccentric loads. The ...
  • Characterization of Bases and Subbases for AASHTO ME Pavement Design
    Characterization of Bases and Subbases for AASHTO ME Pavement Design
    Amirkhanian, Serji N. ;
    Corley, Mary
    2021-01-01 | PDF
    The characteristics of base and subbase layers play a very important role in pavement performance under the complex conditions of traffic loading and environment. Unreasonable and inaccurate base design parameters can result in poor pavement performance as well as higher construction and maintenance costs. This study was conducted to develop materi ...
  • NJDOT UASDrone Procedures Manual and Best Practices for Use in New Jersey Technical Brief
    NJDOT UAS/Drone Procedures Manual and Best Practices for Use in New Jersey [Technical Brief]
    Agrawal, Anil K.
    2021-01-01 | PDF
    Recent advances in Unmanned Aircraft Systems (UAS) technologies have tremendous potential of improving the reliability and efficiency of inspections of transportation infrastructures, such as bridges, highways, railroads, construction projects, high mast light poles, etc. Two major challenges in the adoption of UAS operations for NJDOT transportati ...
  • Driving LowIncome Mothers to Greater Success The Impact of Ridehailing on Income and Employment
    Driving Low-Income Mothers to Greater Success: The Impact of Ridehailing on Income and Employment
    Branstetter, Lee ;
    Li, Beibei
    2021-01-01 | PDF
    In many cities and towns throughout the United States, citizens with lower levels of education and skill confront challenges when seeking employment. The jobs best suited for their skills may be located in a different part of the metro area from their homes, and the existing public transportation system may not provide them with a practical way of ...
  • Implications of a Narrow Automated VehicleExclusive Lane on Interstate 15 Express Lanes
    Implications of a Narrow Automated Vehicle-Exclusive Lane on Interstate 15 Express Lanes
    Machiani, Sahar Ghanipoor ;
    Ahmadi, Alidad
    2021-01-01 | PDF
    The main objective of this study is to evaluate the safety and operational impacts of an innovative infrastructure solution for safe and efficient integration of Automated Vehicle (AV) as an emerging technology into an existing transportation system. Filling the gap in the limited research on the effect of AV technology on infrastructure standards, ...
  • Predicting Critical Shear Stress of FineGrained Soils in Kansas
    Predicting Critical Shear Stress of Fine-Grained Soils in Kansas
    Kulesza, Stacey ;
    Karim, Md Zahidul
    2021-01-01 | PDF
    Critical shear stress is the stress exerted by flowing water that initiates soil erosion. It is a required parameter for estimating scour around structures. The current state of practice for estimating critical shear stress in cohesive soils is to assume a minimum value based on experiments with cohesionless, coarse-grained soils. The most accurate ...
  • Phase IV Development of Transit Network Tools Standards and Processes
    Phase IV: Development of Transit Network Tools, Standards, and Processes
    Porter, J. David ;
    Kim, David S.
    2021-01-01 | PDF
    The main objectives in phase IV of the project were to (1) continue to enhance the visualization and reporting features of the Transit Network Analysis (TNA) software tool, and (2) to ensure that the TNA software tool can be used, modified, and developed by others. To fulfill these objectives, several tasks aimed at incorporating new visualization ...
  • Evaluation of Roadway WormsDistortions
    Evaluation of Roadway Worms/Distortions
    Pullen, Aaron B ;
    Lee, Hyung S
    2021-01-01 | PDF
    The Florida Department of Transportation (FDOT) has experienced roadway worms, or blistering of flexible pavements, for several decades. A literature review indicated that the distress (also referred to as ripples and distortions) generally occurs due to moisture or other gas-forming substances trapped in between two layers of asphalt concrete (AC) ...
  • Assisting VisionImpaired Pedestrians To Cross Streets An Innovative Acoustic Ranging Approach
    Assisting Vision-Impaired Pedestrians To Cross Streets: An Innovative Acoustic Ranging Approach
    Li, Ming
    ORCID ICON IMG
    2021-01-01 | PDF
    To cross uncontrolled roadways, where no traffic-halting signal devices are present, pedestrians with visual impairments must rely on their other senses to detect oncoming vehicles and estimate the correct crossing interval in order to avoid potentially fatal collisions. To overcome the limitations of human auditory performance, which can be partic ...
  • Using Beam Software To Simulate the Introduction of OnDemand Automated and Electric Shuttles for Last Mile Connectivity in Santa Clara County
    Using Beam Software To Simulate the Introduction of On-Demand, Automated, and Electric Shuttles for Last Mile Connectivity in Santa Clara County
    Hsueh, Gary ;
    Czerwinski, David
    2021-01-01 | PDF
    Despite growing interest in low-speed automated shuttles, pilot deployments have only just begun in a few places in the U.S., and there is a lack of studies that estimate the impacts of a widespread deployment of automated shuttles designed to supplement existing transit networks. This project estimated the potential impacts of automated shuttles b ...
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