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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 6081 - 6100 of 36049 results
  • Analyzing Various Data Sources and Evaluating Effectiveness of Providing Travel Time for NonFreeways Phase 1
    Analyzing Various Data Sources and Evaluating Effectiveness of Providing Travel Time for Non-Freeways – Phase 1
    Ma, Jiaqi ;
    Wei, Heng
    2019-02-01 | PDF
    The Ohio Department of Transportation (ODOT) is placing an emphasis on Transportation System Management and Operations (TSMO) as ODOT strives to find innovative ways to fulfill the mission to enhance capacity and improve safety. The current critical success factors already reflect this emphasis by addressing Travel Time Performance. ODOT provides t ...
  • Effects of TopofRail Friction Modifiers on the Friction Wear and Cracks of Railway Rails
    Effects of Top-of-Rail Friction Modifiers on the Friction, Wear and Cracks of Railway Rails
    Khan, Saad Ahmed
    2019-02-01 | PDF
    The railway is an economical and environmentally friendly mode of transport for long distances and heavy loads. The demands on the operators are increasing with increased competition in the market, and therefore they are currently demanding more track capacity. In the short term, the existing network is expected to deliver the increased capacity. I ...
  • Development of Safety Performance Functions for Network Screening of Roadway Departure Crashes in Virginia
    Development of Safety Performance Functions for Network Screening of Roadway Departure Crashes in Virginia
    Kweon, Young-Jun ;
    Lim, In-Kyu
    2019-02-01 | PDF
    Roadway departure (RD) is recognized as one of the eight emphasis areas in the Virginia 2017-2021 Strategic Highway Safety Plan (SHSP), and the Virginia Department of Transportation (VDOT) currently uses counts of RD crashes to identify locations for RD safety improvement. However, identifying locations based on crash counts is subject to bias and ...
  • Investigation and Evaluation of Iowa Department of Transportation Bridge Deck Epoxy Injection Process
    Investigation and Evaluation of Iowa Department of Transportation Bridge Deck Epoxy Injection Process
    Wipf, Terry J. ;
    Phares, Brent
    2019-02-01 | PDF
    Since the 1970s, the Iowa Department of Transportation (DOT) has used concrete overlays as a means of restoring its bridge decks and, as a result, the service life of the deck is commonly extended many years. This procedure has proven to be both effective and economically attractive. Despite that, concrete overlays cannot be considered a permanent ...
  • Economic Development Impact of Preservation Projects Summary
    Economic Development Impact of Preservation Projects [Summary]
    Gkritza, Konstantina ;
    Fricker, Jon D.
    2019-02-01 | PDF
    Preservation and maintenance activities protect pavements and bridges, extending the life of these assets and guaranteeing the safety of users. While preservation and maintenance work have significant overlap, some key differences exist. Preservation is work that is planned and performed to improve or keep a facility in a state of good repair. Usua ...
  • Advancing Transportation Equity Research and Practice
    Advancing Transportation Equity: Research and Practice
    Fan, Yingling ;
    Guthrie, Andrew
    2019-02-01 | PDF
    Transportation contributes to many societal outcomes, including employment, health, and wealth. However, disparities and inequities in transportation systems, services, and decision-making processes disproportionately impact underserved and underrepresented communities. This study seeks to create a better understanding of current research and pract ...
  • AID Project Summary Report for Intelligent Compaction
    AID Project Summary Report for Intelligent Compaction
    Hunsucker, David Q. ;
    Ashurst, Kean H.
    2019-02-01 | PDF
    This study reviews data from five roadway construction projects on which intelligent compaction (IC) techniques were used to achieve the more uniform compaction of road-building materials. Kentucky Transportation Center (KTC) researchers looked at IC data collected from these projects — resulting in the production of eight analyzable data sets — to ...
  • Distracted Driving Strategies and State of the Practices
    Distracted Driving: Strategies and State of the Practices
    Mitran, Elisabeta ;
    Ellender, Tess
    2019-02-01 | PDF
    This technical assistance report conducted an extensive literature review to obtain the state of knowledge on existing research on distracted driving in the US. The objective of this report was to review relevant studies on distracted driving including measurements, strategies, legislation, employer policies, and technologies used nationally to pre ...
  • Connected Vehicle Pilot Deployment Program Phase I Partnership Status Summary Tampa THEA Final Report
    Connected Vehicle Pilot Deployment Program Phase I: Partnership Status Summary: Tampa (THEA) [Final Report]
    Krueger, Gregory D. ;
    Johnson, Steven
    2019-02-01 | PDF
    The Tampa Hillsborough Expressway Authority (THEA) Connected Vehicle (CV) Pilot Deployment Program is developing a suite of CV applications, or apps, that utilize vehicle-to-infrastructure (V2I), vehicle-to-vehicle (V2V) and Vehicle to everything (V2X) communication technology to reduce traffic congestion, improve safety, and decrease emissions. Th ...
  • CostEffectiveness of Constructing Minimal Shelter to Store INDOT Equipment Weather Protection
    Cost-Effectiveness of Constructing Minimal Shelter to Store INDOT Equipment (Weather Protection)
    Iyer, Ananth V ;
    Dunlop, Steven R
    2019-02-01 | PDF
    Currently vehicles used by Indiana Department of Transportation (INDOT) are more likely to be subject to maintenance and repair than to replacement. The extent of wear and tear on the vehicles is likely to be impacted by the lack of covered storage in all districts. There are many different levels of covered storage—from tent-like structures to com ...
  • Understanding Ridership Trends in Transit
    Understanding Ridership Trends in Transit
    Polzin, Steven E. ;
    Godfrey, Jodi
    2019-02-01 | PDF
    Florida has seen dramatic ridership declines in the past four years. These declines are over two times more severe than those for the nation and have continued thru 2018. The declines are pervasive with the most severe declines in southeastern Florida locations, which are the most conducive to transit. The changes in ridership on public transportat ...
  • Evaluation of Incident Response Improvements for Statewide Application Learnings from the New Regional Traffic Management Center in Jacksonville FL Summary
    Evaluation of Incident Response Improvements for Statewide Application: Learnings from the New Regional Traffic Management Center in Jacksonville, FL [Summary]
    Vega, Peter ;
    Allen, Russell
    2019-02-01 | PDF
    University of North Florida researchers evaluated the performance of the new regional TMC in Jacksonville and quantified the impact of incidents on the operational and safety performance of the freeway network.
  • Rail Corridor Trespass Severity Assessment
    Rail Corridor Trespass Severity Assessment
    Searcy, Sarah ;
    Cunningham, Chris M.
    2019-02-01 | PDF
    This research project builds on NCDOT RP 2015-18 (“Reduction in Railroad Right-of-Way Incidents”). For NCDOT RP 2015-18, the research team analyzed Federal Railroad Administration (FRA)-reported trespassing incidents along the 174-mile North Carolina Railroad (NCRR)/Piedmont corridor between Raleigh and Charlotte, NC using strike rates, Amtrak trai ...
  • Corrosion Prevention of Bridge Tendons Using Flexible Filler Materials Summary
    Corrosion Prevention of Bridge Tendons Using Flexible Filler Materials [Summary]
    Presuel-Moreno, Francisco J
    2019-02-01 | PDF
    Florida Atlantic University researchers examined the corrosion resistance of five flexible fillers under a variety of exposure conditions and when the fillers were contaminated with fungi.
  • Evaluation of GussetLess Truss Connection to Aid Bridge Inspection and Condition Assessment
    Evaluation of Gusset-Less Truss Connection to Aid Bridge Inspection and Condition Assessment
    Bell, Erin Santini ;
    Medina, Ricardo A
    2019-02-01 | PDF
    In 2013, the newly designed Memorial Bridge, located between Portsmouth, NH, and Kittery, ME, was opened to traffic. The structural system of the bridge is composed of truss elements with a unique “gusset-less” connection which utilizes curved steel to transition from the chords to the diagonals where splice plates join the members. In this study, ...
  • Connected Vehicle Pilot Deployment Program Phase I Comprehensive Pilot Deployment Plan Tampa Hillsborough Expressway Authority THEA
    Connected Vehicle Pilot Deployment Program Phase I: Comprehensive Pilot Deployment Plan: Tampa Hillsborough Expressway Authority (THEA)
    Johnson, Steven ;
    Blue, Victor
    2019-02-01 | PDF
    The Tampa Hillsborough Expressway Authority (THEA) Connected Vehicle (CV) Pilot Deployment Program is part of a national effort to advance CV technologies by deploying, demonstrating, testing and offering lessons learned for future deployers. The THEA CV Pilot is developing a suite of CV applications, or apps, that utilize vehicle-to-infrastructure ...
  • Creative Utilization of Urban Roadway Facilities with Predictive Safety Assessment Tool Phase 1
    Creative Utilization of Urban Roadway Facilities with Predictive Safety Assessment Tool – Phase 1
    Islam, Mouyid Bin ;
    Chen, Cong
    2019-01-31 | PDF
    The impact of predictive safety assessment based on quantitative methodology of the Highway Safety Manual (HSM) is significant, particularly in urban roadway facilities. Realizing this significance, the responsibilities of safety professionals, transportation planners, and decisionmakers are critical for safe and efficient transportation in the eve ...
  • Life Space Mobility and Aging in Place
    Life Space Mobility and Aging in Place
    Zambrana, Ivis Garcia ;
    DeLaTorre, Alan
    2019-01-31 | PDF
    Research on older adults explores the notion of “aging in place”—providing older adults the opportunity to continue to occupy familiar surroundings, to live in their own homes and communities. But oftentimes one’s ability to stay or leave, particularly in old age, depends on the built environment. Mobility is the ability to meet the basic needs to ...
  • Improved Resiliency of Transportation Networks through Connected Mobility
    Improved Resiliency of Transportation Networks through Connected Mobility
    Ziehl, Paul H. ;
    Pang, Weichiang
    2019-01-31 | PDF
    A significant number of bridges (older bridges in particular) in the Southeastern and Central region of United States have been designed and constructed according to older seismic provisions. Based on an article by Wong et al. (2005), the economic loss from the Charleston region could reach over $14 billion if the 1886 Charleston earthquake were to ...
  • Development of Specifications for PortlandLimestone Cement
    Development of Specifications for Portland-Limestone Cement
    Elahi, Md Manjur A ;
    Shearer, Christopher R
    2019-01-31 | PDF
    Sulfate attack can occur in concrete due to external sulfate ions reacting with hydrated cement paste. The sulfate attack resistance of portland-limestone cements (PLCs) has been questioned due to their high limestone content, which has the potential to initiate a rare type of sulfate attack that forms thaumasite. This research evaluates the perfor ...
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