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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 3461 - 3480 of 35958 results
  • Improvement of ParkandRide Facilities and Services in Metropolitan Areas of Tennessee
    Improvement of Park-and-Ride Facilities and Services in Metropolitan Areas of Tennessee
    Khojandi, Anahita ;
    Brakewood, Candace
    2021-06-25 | PDF
    Strategic placement of park-and-ride (P&R) facilities is extremely important to ensure the facilities are effectively utilized by commuters, avoiding oversubscription or underutilization after placement. This report develops a framework that integrates a demand model and an optimization model to study the optimal placement of P&R facilities to maxi ...
  • Cross Asset Management Tools
    Cross Asset Management Tools
    Drzymalski, Julie
    2021-06-25 | PDF
    PennDOT seeks to find a methodology to prioritize work of their two largest asset classes, bridges and pavements using the Lowest Life Cycle Cost methodology (LLCC) to make more effective and efficient use of resources. Optimization of the projects is unrealistic given the volume of necessary work and complexity of the LLCC methodology. This resear ...
  • Fighting for Curb Space: Parking, Ride-Hailing, Urban Freight Deliveries, and Other Users [supporting dataset]
    Jaller, Miguel ;
    Rodie, Caroline
    2021-06-24 | ZIP
    This study conducted a comprehensive literature review on several topics related to curb space management, discussing various users (e.g., pedestrians, bicycles, transit, taxis, and commercial freight vehicles), summarizing different experiences, and focusing the discussion on Complete Street strategies. Moreover, the authors reviewed the academic ...
    Dataset
  • Changing Access to Public Transportation and the Potential for Increased Travel
    Changing Access to Public Transportation and the Potential for Increased Travel
    Watkins, Kari E. ;
    McDonald, Noreen
    2021-06-22 | PDF
    With nationwide declines in public transportation ridership, transit may be falling behind in its ability to help cities deal with congestion. Increasing real-estate values are causing the economic displacement of low-income populations, those most closely associated with transit ridership. A plethora of new mobility options are providing alternati ...
  • Mechanically Stabilized Earth MSE Wall Backfill Water Infiltration
    Mechanically Stabilized Earth (MSE) Wall Backfill Water Infiltration
    Soleimanbeigi, Ali ;
    Bohrer, Keli
    2021-06-21 | PDF
    The stability of Mechanically Stabilized Earth (MSE) walls may be compromised in undrained conditions such as during heavy rain, flooding, or rapid drawdown. For MSE walls potentially subject to inundation, such as those located adjacent to rivers, canals, detention basins or retention basins, understanding pore pressure evolution during infiltrati ...
  • Project TraumaHawk Improving Patient Outcomes Through Photographic Trauma Site Documentation Phase IV Regional Expansion
    Project TraumaHawk: Improving Patient Outcomes Through Photographic Trauma Site Documentation Phase IV: Regional Expansion
    McGehee, Daniel V. ;
    Buresh, Chris
    2021-06-20 | PDF
    TraumaHawk, a smartphone app for law enforcement and first responders, was designed by the University of Iowa (UI) to connect pre-hospital emergency care to hospital trauma teams. At the scene of a crash, first responders use TraumaHawk to generate and send a report with vital collision information, as well as photographs showing extent of intrusio ...
  • Public Perceptions of Transportation Fees and Taxes in North Carolina 2020
    Public Perceptions of Transportation Fees and Taxes in North Carolina 2020
    McCaleb, Emeline ;
    Head, Weston
    2021-06-18 | PDF
    Changing trends in the automobile market are challenging the long-term sustainability of revenue streams—and possibly how the public perceives them. In response, North Carolina Department of Transportation (NCDOT) commissioned a survey to better understand how the public perceives transportation taxes and fees in 2019 and followed up with an update ...
  • Learning from USACE Open Data for Locks
    Learning from USACE Open Data for Locks
    Chimka, Justin R.
    2021-06-14 | PDF
    The focus of this research was to analyze the Navigation and Civil Works Decision Support Center (NDC) Key Lock Report, “a monthly summary and year-to-year totals of commodity tonnages and barge traffic for key locks on the inland waterways (U.S. Army Corps of Engineers (USACE) Institute for Water Resources Planning Assistance Library).” This proje ...
  • CTDOT Specification Requirements for Minimum Asphalt Requirements
    CTDOT Specification Requirements for Minimum Asphalt Requirements
    Zinke, Scott ;
    Mahoney, James
    2021-06-14 | PDF
    CTDOT minimum asphalt requirements have resulted in roadway mixes being produced with finer aggregate gradations in recent years than they have in the past. This research was conducted to investigate the possibility of lowering the minimum asphalt content requirements in an effort to drive the mix gradations coarser without compromising the perform ...
  • Cost of Plug-In Electric Vehicle Ownership: The Cost of Transitioning to Five Million Plug-In Vehicles in California [supporting datasets]
    Chakraborty, Debapriya ;
    Buch, Koral
    2021-06-12 | ZIP
    Total cost of ownership (TCO) studies are generally used as a tool to understand how and when the plug-in electric vehicle (PEV) technology will reach cost parity with conventional fuel vehicles. Post cost-parity, the PEV market should be able to sustain without government intervention. We present here a detailed analysis of vehicle manufacturing c ...
    Dataset Supporting Files
  • ConnectedAutomated Vehicle and Infrastructure Research Michigan Mobility Transformation Facility MTF
    Connected/Automated Vehicle and Infrastructure Research [Michigan Mobility Transformation Facility (MTF)]
    Sayer, James R.
    ORCID ICON IMG
    2021-06-11 | PDF
    The concept of the Michigan Mobility Transportation Facility, now known as Mcity, formed from a recognized need for a safe, controlled environment in which to develop various connected and automated vehicle (CAV) components that included interaction with real-world infrastructure. Therefore, one could say Mcity grew out of necessity; but it has als ...
  • River Ice Measurements for Transportation Safety in Rural Communities
    River Ice Measurements for Transportation Safety in Rural Communities
    Stuefer, Svetlana ;
    Richards, Elizabeth
    2021-06-10 | PDF
    This project is relevant to the cold areas of Federal Region 10, where transportation routes occur on the frozen surfaces of lakes and rivers for three to four months each year Transportation safety on ice roads is a complex problem that involves people, vehicles, river ice, and weather conditions. While all these factors must be considered, this s ...
  • 2020 Critical Update to Caltrans Wildfire Vulnerability Analysis [supporting dataset]
    Thorne, James H. ;
    Boynton, Ryan M
    2021-06-09 | ZIP
    The data and materials presented here support a research project conducted by UC Davis in support of Caltrans, a transportation agency that is conducting a wildfire vulnerability risk assessment for fuels reduction in the right of Way (ROW) to protect Caltrans’ infrastructure and travelers. We reviewed the 21 layers used in a 2019 fire risk model a ...
    Dataset Supporting Files
  • Combining Crowdsourcing and Machine Learning to Collect Sidewalk Accessibility Data at Scale
    Combining Crowdsourcing and Machine Learning to Collect Sidewalk Accessibility Data at Scale
    Froehlich, Jon E
    ORCID ICON IMG
    2021-06-09 | PDF
    The authors are developing new data collection approaches that use a combination of remote crowdsourcing, machine learning, and online map imagery. Their newest effort, called Project Sidewalk, enables online crowdworkers to remotely label pedestrian-related accessibility problems by virtually walking through city streets in Google Street View. In ...
  • Investigation of Pavement Emulsion Absorption Rates
    Investigation of Pavement Emulsion Absorption Rates
    Castorena, Cassie ;
    Fried, Andrew
    2021-06-07 | PDF
    The Emulsion Application Rate (EAR) is critical to the performance of both tack coats and chip seals. When emulsion is applied to an aged flexible pavement, a portion of the applied emulsion will be absorbed by the existing pavement. To compensate, the current practice is to adjust the required target EAR used in the construction based on visual in ...
  • Fighting for Curb Space Parking RideHailing Urban Freight Deliveries and Other Users
    Fighting for Curb Space: Parking, Ride-Hailing, Urban Freight Deliveries, and Other Users
    Jaller, Miguel ;
    Rodie, Caroline
    2021-06-01 | PDF
    There is a need to optimally allocate curb space-one of the scarcest resources in urban areas-to the different and growing needs of passenger and freight transport. Although there are plenty of linear miles of curbside space in every city, the growing adoption of ride-hailing services and the rise of e-commerce with its residential deliveries, and ...
  • Infrasound Avalanche Monitoring Enhanced Monitoring in Little Cottonwood Canyon Utah
    Infrasound Avalanche Monitoring: Enhanced Monitoring in Little Cottonwood Canyon, Utah
    Johnson, Jeffrey B ;
    Marshall, Hans-Peter
    2021-06-01 | PDF
    The work is a continuation of a 2017-2018 TARP project, which focused on testing infrasound sensor technology and deployment optimization of infrasound stations for monitoring of snow avalanches in Little Cottonwood Canyon (LCC), Utah. The goals of this project were to develop software and hardware solutions to permit (cell) telemetry of synthesize ...
  • Rock Cut Blasting Aesthetics Best Management Practices Phase II
    Rock Cut Blasting Aesthetics Best Management Practices Phase II
    Allen, Thomas J. ;
    Andrew, Richard
    2021-06-01 | PDF
    Rock excavations are necessary for construction of highways in transportation corridors that pass through Colorado’s mountains. Scenery along these corridors is an asset worthy of preservation and rock slope excavations can negatively impact the visual appeal of the natural landscape. The visual impacts from rock excavations can be mitigated by use ...
  • Development and MASH TL4 Evaluation of TxDOT LargeScupper Median Barrier for FloodProne Areas
    Development and MASH TL-4 Evaluation of TxDOT Large-Scupper Median Barrier for Flood-Prone Areas
    Dobrovolny, Chiara Silvestri ;
    Kovar, James C.
    2021-06-01 | PDF
    Concrete median barriers are designed to mitigate serious cross-median crashes by preventing penetration of errant vehicles into oncoming traffic. When implemented in flood-prone areas, however, solid concrete median barriers can act as a dam to floodwaters, as recently seen in Texas during Hurricane Harvey or in Louisiana and Pennsylvania followin ...
  • Researching Relationships Between Truck Travel Time Performance Measures and OnNetwork and OffNetwork Characteristics
    Researching Relationships Between Truck Travel Time Performance Measures and On-Network and Off-Network Characteristics
    Duvvuri, Sarvani ;
    Pulugurtha, Srinivas S.
    2021-06-01 | PDF
    Trucks serve significant amount of freight tonnage and are more susceptible to complex interactions with other vehicles in a traffic stream. While traffic congestion continues to be a significant ‘highway’ problem, delays in truck travel result in loss of revenue to the trucking companies. There is a significant research on the traffic congestion m ...
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