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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 3521 - 3540 of 36011 results
  • ReRounding of Deflected Thermoplastic Conduit Phase 2
    Re-Rounding of Deflected Thermoplastic Conduit, Phase 2
    Sargand, Shad ;
    Khoury, Issam
    2021-06-01 | PDF
    Re-rounding is a technique for remediating excess deflection in a thermoplastic pipe using a pneumatic device vibrating along the vertical axis and pushing against the inside crown and invert to restore the original pipe shape and redistribute the surrounding backfill. Since the process has not been evaluated on HDPE pipe outside a couple older rep ...
  • Fourteen Pathways between Urban Transportation and Health A Conceptual Model Literature Review and Burden of Disease Assessment
    Fourteen Pathways between Urban Transportation and Health: A Conceptual Model, Literature Review, and Burden of Disease Assessment
    Khreis, Haneen ;
    Sohrabi, Soheil
    2021-06-01 | PDF
    Transportation has been linked to several adverse health impacts, with a large, but modifiable, burden of disease. In this work, researchers conceptualized and documented the linkages between transportation and health. Following that, the researchers quantified the impacts of transportation on health in a case study in Houston, Texas, that focused ...
  • Image Processing and Machine Learning Techniques for Automated Detection of Planes at Utah Airports
    Image Processing and Machine Learning Techniques for Automated Detection of Planes at Utah Airports
    Farhadmanesh, Mohammad ;
    Rashidi, Abbas
    2021-06-01 | PDF
    Most of the airports in the United States are non-towered airports. Utah is not an exception to this rule. As a result, these airports fall behind in terms of aircraft operation count and identification. On the other hand, image detection and recognition have long been assisting different industrial areas in shifting towards automation in performin ...
  • Roadway Lightings Effect on Pedestrian Safety at Intersection and Midblock Crosswalks
    Roadway Lighting’s Effect on Pedestrian Safety at Intersection and Midblock Crosswalks
    Bhagavathula, Rajaram ;
    Gibbons, Ronald
    2021-06-01 | PDF
    Soils containing inorganic compounds are frequently encountered by transportation agencies during construction within the right-of-way, and they pose a threat to human health and the environment. As a result, construction activities may experience project delays and increased costs associated with management of inorganic compounds containing soils ...
  • Longitudinal Analyses of Washington State Student Travel Surveys
    Longitudinal Analyses of Washington State Student Travel Surveys
    Moudon, Anne Vernez ;
    Shi, Xiao
    2021-06-01 | PDF
    Part of a long-term collaboration between the University of Washington (UW) and Washington State Department of Transportation (WSDOT), this project contained two studies: (1) longitudinal changes in active school transport (AST) rates and (2) impacts of Safe Routes to School (SRTS) projects on AST rates. (1) The average rate of AST for the 241 scho ...
  • Application of Different Negative Binomial Parameterizations To Develop Safety Performance Functions for NonFederal Aid System Roads
    Application of Different Negative Binomial Parameterizations To Develop Safety Performance Functions for Non-Federal Aid System Roads
    Khodadadi, Ali ;
    Tsapakis, Ioannis
    2021-06-01 | PDF
    Safety performance functions (SPFs) are the main building blocks in understanding the relationships between crash risk factors and crash frequencies. Many research efforts have focused on high-volume roadways that typically experience more crashes. A few studies have documented SPFs for non-federal aid system (NFAS) roads including rural minor coll ...
  • Evaluation of Chemical Solutions to Concrete Durability Problems
    Evaluation of Chemical Solutions to Concrete Durability Problems
    Fong-Martinez, Bruno ;
    Wheeless, Jeremy
    2021-06-01 | PDF
    The reinforced concrete infrastructure in Texas has been plagued by various durability-related issues over the years, including deterioration from alkali-silica reaction (ASR), delayed ettringite formation (DEF), and corrosion of reinforcing steel. For many of these durability problems, fly ash has been the remedy of choice; however, with changes i ...
  • Division of Construction Research OnCall Services 20202023 Task 1 Detection of Segregation in Asphalt Concrete Pavement
    Division of Construction Research On-Call Services 2020–2023 Task 1: Detection of Segregation in Asphalt Concrete Pavement
    Sargand, Shad ;
    Russ, Andrew
    2021-06-01 | PDF
    Segregation in asphalt pavement can manifest either as variation in the gradation of the aggregate in the asphalt mix (gradation segregation) or as variation in the temperature (thermal segregation), and both may occur together. Perhaps the primary cause of segregation is improper handling during mixing, transportation, and placement of the asphalt ...
  • Develop Refine and Validate a Survey to Assess Adults Perspectives of Autonomous RideSharing Services
    Develop, Refine, and Validate a Survey to Assess Adult's Perspectives of Autonomous Ride-Sharing Services
    Classen, Sherrilene ;
    Mason, Justin
    2021-06-01 | PDF
    Autonomous vehicles (AVs) have generated great excitement for the future of transportation. Not only are self-driving cars already being piloted, but there is also significant interest and investment in shared automated transportation services by companies such as Uber, Lyft, and Voyage (Isaac, 2017). Despite the excitement, there is much uncertain ...
  • Feasibility Study and Design of InRoad Electric Vehicle Charging Technologies
    Feasibility Study and Design of In-Road Electric Vehicle Charging Technologies
    Konstantinou, Theodora ;
    Haddad, Diala
    2021-06-01 | PDF
    Electric Roadways (ERs) or Dynamic Wireless Charging (DWC) lanes offer an alternative dynamic and wireless charging method that has the potential of giving electric vehicles (EV) limitless range while they are moving. Heavy-duty vehicles (HDVs) are expected to be early adopters of the DWC technology due to the higher benefits offered to these vehic ...
  • Expectations and Understanding of Advanced Driver Assistance Systems Among Drivers Pedestrians Bicyclists and Public Transit Riders
    Expectations and Understanding of Advanced Driver Assistance Systems Among Drivers, Pedestrians, Bicyclists, and Public Transit Riders
    Horrey, William J ;
    Benson, Aaron
    2021-06-01 | PDF
    Vehicle technology has progressed significantly over the past 20 years to the point where automated systems can now take on different aspects of a vehicle’s control. While drivers play a central role in the effective and appropriate use of these technologies, these systems do not affect the drivers of such vehicles alone. Other road users must inte ...
  • Development of Modified TXDOT SinglePost SkidMounted Sign Support
    Development of Modified TXDOT Single-Post Skid-Mounted Sign Support
    Bligh, Roger P. ;
    Schulz, Nathan D.
    2021-06-01 | PDF
    Previous crash testing determined that the conventional Texas Department of Transportation (TxDOT) single-post skid-mounted sign support did not satisfy guidelines included in the American Association of State Highway and Transportation Officials Manual for Assessing Safety Hardware (MASH). Modifications were made to the system to improve impact pe ...
  • Evaluation of East Gainesvilles Microtransit Mobility Project
    Evaluation of East Gainesville’s Microtransit Mobility Project
    Steiner, Ruth L. ;
    Srinivasan, Siva
    2021-06-01 | PDF
    This study evaluates the microtransit pilot program in East Gainesville and provides recommendations to achieve long-term stability of services. We used the following methods in this research: geospatial analysis of existing transit and microtransit services in East Gainesville and their use during 2020, interviews with public officials and communi ...
  • Infrastructure To Support Advanced Autonomous Aircraft Technologies in Ohio Economic Impact Report for Advanced Autonomous Aircraft Technologies in Ohio
    Infrastructure To Support Advanced Autonomous Aircraft Technologies in Ohio: Economic Impact Report for Advanced Autonomous Aircraft Technologies in Ohio
    Del Rosario, Ruben ;
    Davis, Tom
    2021-06-01 | PDF
    The State of Ohio faces both opportunities and challenges with regards to future transportation systems. Advanced Air Mobility is a concept of air transportation that moves people and cargo between places not conveniently served by surface transportation or underserved by aviation. Driven by the economic and societal promise of AAM, the Ohio Depart ...
  • Design and Construction of Infiltration Facilities
    Design and Construction of Infiltration Facilities
    Tecca, Nicholas P ;
    Gulliver, John S.
    2021-06-01 | PDF
    Infiltration stormwater control measures are an important structural practice to mitigate the impacts of urbanization on stormwater quality and quantity. Infiltration stormwater control measures help to mimic the natural processes of infiltration and evapotranspiration. Unfortunately, the failure rate of infiltration stormwater control measures has ...
  • Integration of Utility Engineering Coordination and Highway Design
    Integration of Utility Engineering, Coordination, and Highway Design
    Taylor, Tim ;
    Sturgill, Roy
    2021-06-01 | PDF
    State transportation agencies (STAs) strive to deliver highway projects on time and on budget. Utility relocations are frequently cited as a primary reason for delays. This report describes a new approach for enhancing the alignment of utility coordination and design. Researchers crafted this new approach based on the findings of a literature revie ...
  • Assessment of Bicycle Detection Confirmation and Countdown Devices
    Assessment of Bicycle Detection Confirmation and Countdown Devices
    Monsere, Christopher ;
    Kothuri, Sirisha
    2021-06-01 | PDF
    This research examined alternate designs for bicycle detection feedback confirmation devices. The research used quantitative data from a video review and responses from surveys to study how the information provided by the confirmation and feedback device affects the overall cycling experience. An online survey was conducted to determine comprehensi ...
  • Failing Malls Optimizing Opportunities for Housing
    Failing Malls: Optimizing Opportunities for Housing
    Blanco, Hilda J.
    ORCID ICON IMG
    2021-06-01 | PDF
    California, like most of the country, was facing a transformation in retail before the COVID-19 epidemic. Increasing Internet shopping have ushered the closing of anchor stores, such as Macy's, Sears, as well as the closure of many regional shopping malls, which have sizable footprints, ranging from 40-100+ acres. The epidemic has accelerated these ...
  • Modal Shifts in California from 20122017 Investigating Changes in Biking Walking and Transit from the 2012 CHTS and 2017 NHTS
    Modal Shifts in California from 2012-2017: Investigating Changes in Biking, Walking, and Transit from the 2012 CHTS and 2017 NHTS
    Pike, Susan ;
    Handy, Susan
    2021-06-01 | PDF
    This study evaluates changes in travel mode shares in California over the period from 2012, when the California Household Travel Survey (CHTS) was most recently completed, to 2017, the most recent implementation of National Household Travel Survey (NHTS). Initial review of the data suggests decreases in biking and walking over this time period. Thi ...
  • Local Policy for Better Micromobility
    Local Policy for Better Micromobility
    Fuller, Sam ;
    Fitch, Dillon T.
    2021-06-01 | PDF
    This report highlights key themes from a series of ten interviews with U.S. cities with micromobility programs in their jurisdictions (Atlanta, GA; Austin, TX; Chicago, IL; District of Columbia; Denver, CO; Los Angeles, CA; Oakland, CA; Portland, OR; San Diego, CA; Seattle, WA). The research aims to shed light on both the regulatory process and ide ...
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