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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 6141 - 6160 of 36049 results
  • Assessing the SocioEconomic Implications Related to the Emergence of Shared Autonomous Vehicles
    Assessing the Socio-Economic Implications Related to the Emergence of Shared Autonomous Vehicles
    Losada-Rojas, Lisa Lorena ;
    Gkartzonikas, Christos
    2019-01-01 | PDF
    The emergence of shared autonomous vehicles (SAVs) is expected to alter transportation costs and patterns, thus affecting accessibility and mobility (i.e., transportation disadvantage), and could have direct and indirect socio-economic implications, such as access to opportunities and flexible and affordable mobility. This presentation will describ ...
  • Extended Life Concrete Bridge Decks Utilizing Improved Internal Curing To Reduce Cracking
    Extended Life Concrete Bridge Decks Utilizing Improved Internal Curing To Reduce Cracking
    Wang, Xuhao ;
    Taylor, Peter
    2019-01-01 | PDF
    With the ongoing concern about premature cracking of concrete bridge decks that reduces the service life of bridges and results in increased maintenance and replacement costs, this work aimed at assessing the benefits of using lightweight fine aggregate (LWFA) in concrete mixtures to assist the Ohio Department of Transportation (ODOT) in preparing ...
  • Florida Aviation Activity Forecast Methodologies and Tools Development Summary
    Florida Aviation Activity Forecast Methodologies and Tools Development [Summary]
    Zhang, Yu
    ORCID ICON IMG
    2019-01-01 | PDF
    To ensure the efficient operation and healthy development of the state’s airports, the Florida Department of Transportation (FDOT) developed the Aviation Grant Program to provide financial assistance to Florida’s airports. To guide airport planning and financial decisions, it is essential to have accurate forecasts of airport activity, which provid ...
  • Demonstration Project for Implementation of Performance Enhanced Mixtures PEM
    Demonstration Project for Implementation of Performance Enhanced Mixtures (PEM)
    Hanson, Todd ;
    McDaniel, Lisa
    2019-01-01 | PDF
    Concrete has traditionally been accepted by testing air, slump, and strength. However, these test methods usually do not have a direct relationship with long term durability. A number of new test methods have been developed that give a better prediction of long-term performance. On a recent paving project on US 20 in Woodbury County, Iowa, several ...
  • Improving the Accuracy and Applicability of Kansas Traffic Data Technical Summary
    Improving the Accuracy and Applicability of Kansas Traffic Data [Technical Summary]
    Kondyli, Alexandra ;
    Schrock, Steven D.
    2019-01-01 | PDF
    This research investigated the accuracy and reliability of KC Scout traffic sensors in the Kansas City metropolitan area. The locations and sensors under investigation are of particular importance to the Kansas Department of Transportation (KDOT) because they regularly report accurate traffic counts to the Federal Highway Administration (FHWA).
  • Strategic and Tactical Guidance for the Connected and Autonomous Vehicle Future
    Strategic and Tactical Guidance for the Connected and Autonomous Vehicle Future
    Ukkusuri, Satish V. ;
    Sagir, Fasil
    2019-01-01 | PDF
    Autonomous vehicle (AV) and connected vehicle (CV) technologies are rapidly maturing and the timeline for their wider deployment is currently uncertain. These technologies are expected to have a number of significant societal benefits: traffic safety, improved mobility, improved road efficiency, reduced cost of congestion, reduced energy use, and r ...
  • Concrete Grinding Residue Its Effect on Roadside Vegetation and Soil Properties
    Concrete Grinding Residue: Its Effect on Roadside Vegetation and Soil Properties
    Ceylan, Halil ;
    Zhang, Yang
    2019-01-01 | PDF
    Concrete grinding residue (CGR) is a slurry waste consisting of water and concrete fines generated from diamond grinding operations that is used to smooth a concrete pavement surface. During this process, CGRs are mostly disposed along the roadside, which can influence soils and plant communities along the roadways. To understand the effects of CGR ...
  • Smart Mobility for Seniors Challenges and Solutions in El Paso TX and New York NY
    Smart Mobility for Seniors: Challenges and Solutions in El Paso, TX, and New York, NY
    Vechione, Matthew ;
    Marrufo, Corina
    2019-01-01 | PDF
    Many older adults or seniors face mobility issues as they age, for example, switching from driving to using carpool, taxi, or staying on fixed routes. Seniors require responsive transportation services to attend activities. Unfortunately, there are limited tools to assist seniors to find the most appropriate transportation options given their mobil ...
  • Using the New SHRP2 Naturalistic Driving Study Safety Databases to Examine Safety Concerns for Older Drivers
    Using the New SHRP2 Naturalistic Driving Study Safety Databases to Examine Safety Concerns for Older Drivers
    Knodler, Michael A. ;
    Samuel, Siby
    2019-01-01 | PDF
    Older drivers, age 65 and over, in the New England region have higher rates of crashes and of crash-related fatalities than middle-age drivers, and are especially over-represented in crashes occurring during left turns at signalized intersections. This study sought to learn more about the factors behind this trend, utilizing information from the SH ...
  • Analyzing Transportation Big Data with GIS Detecting Overspeeding Vehicles from Traffic GPS Data
    Analyzing Transportation Big Data with GIS: Detecting Over-speeding Vehicles from Traffic GPS Data
    Chen, Yulu ;
    Tsou, Ming-Hsiang
    2019-01-01 | PDF
    With the popularity of automobiles and increasing volume of vehicles, the traffic accident rates in U.S. cities are increasing year by year. The aggressive driving behaviors can be considered as one of the main reasons to lead to serious traffic crashes according to AAA (American Automobile Association) Foundation for Traffic Safety. Over-speeding ...
  • Assessment of Bridges Subjected to Vehicular Collision Summary
    Assessment of Bridges Subjected to Vehicular Collision [Summary]
    Thrall, Ashley P
    2019-01-01 | PDF
    Vehicles often collide with bridges. However, there are no available guidelines for bridge inspectors to assess damage and make repair decisions. This project addresses this gap by investigating the behavior of steel girder bridges subjected to vehicular collision through (1) performing non-destructive field testing, (2) developing validated numeri ...
  • Assessing Potential Effects of Highway and Urban Runoff on Receiving Streams in Total Maximum Daily Load Watersheds in Oregon Using the Stochastic Empirical Loading and Dilution Model
    Assessing Potential Effects of Highway and Urban Runoff on Receiving Streams in Total Maximum Daily Load Watersheds in Oregon Using the Stochastic Empirical Loading and Dilution Model
    Stonewall, Adam J ;
    Granato, Gregory E.
    2019-01-01 | PDF
    The Stochastic Empirical Loading and Dilution Model (SELDM) was developed by the U.S. Geological Survey (USGS) in cooperation with the Federal Highway Administration to simulate stormwater quality. To assess the effects of runoff, SELDM uses a stochastic mass-balance approach to estimate combinations of pre-storm streamflow, stormflow, highway runo ...
  • Guide for Pedestrian and Bicyclist Count Data Submittal
    Guide for Pedestrian and Bicyclist Count Data Submittal
    Turner, Shawn ;
    Lasley, Phil
    2019-01-01 | PDF
    The Guide for Pedestrian and Bicyclist Count Data Submittal describes procedures for preparing and submitting pedestrian and bicyclist count data to the Texas Department of Transportation’s (TxDOT’s) statewide non-motorized count database. The TxDOT Statewide Bicycle and Pedestrian Program (within TxDOT’s Public Transportation Division) will mainta ...
  • An Assessment of DOTDs Consultant Plan Development and Performance Rating Process Research Project Capsule 186SS
    An Assessment of DOTD’s Consultant Plan Development and Performance Rating Process: Research Project Capsule: [18–6SS]
    Hamilton, Ron ;
    Rupnow, Tyson
    2019-01-01 | PDF
    The objectives of this project are to identify best practices among other state DOTs for the evaluation of consultant plan deliverables and performance rating systems; conduct a thorough review and assessment of the current DOTD consultant plan delivery process; and evaluate the effectiveness and subjectivity of the current DOTD consultant performa ...
  • Development of Geosynthetic Design and Construction Guidelines for Pavement Embankment Construction in North Georgia
    Development of Geosynthetic Design and Construction Guidelines for Pavement Embankment Construction in North Georgia
    Kim, S. Sonny ;
    Frost, J. David
    2019-01-01 | PDF
    Geosynthetics are becoming a popular alternative for soil improvement in highway construction to achieve enhanced performance in regions with soft problematic soils or to reduce aggregate base layer thickness to decrease construction costs. Subgrade soil improvement in a geosynthetic-reinforced pavement system is achieved by lateral distribution of ...
  • CorrosionFree Carbon Fiber Reinforced Polymer for Prestressed Piles
    Corrosion-Free Carbon Fiber Reinforced Polymer for Prestressed Piles
    Sharp, Stephen R ;
    Ozyildirim, H Celik
    2019-01-01 | PDF
    This study investigated the feasibility of replacing traditional steel strands and spiral reinforcement in bridge piles with carbon fiber reinforced polymer (CFRP) strands and spiral reinforcement. CFRP is a corrosion-free material, whereas the conventional steel reinforcement used in a traditional pile is prone to corrosion when exposed to chlorid ...
  • Select Transportation Infrastructure of the United States 2019
    Select Transportation Infrastructure of the United States [2019]
    United States. Bureau of Transportation Statistics. Office of Geographic Information Services
    2019-01-01 | PDF
    A large-scale, double-sided map of the transportation infrastructure of the United States, and its characteristics.
    Supporting Files
  • Implementation of Small Samples for Developing FullDepth Recycling Mix Designs
    Implementation of Small Samples for Developing Full-Depth Recycling Mix Designs
    Sebesta, Stephen ;
    Scullion, Tom
    2019-01-01 | PDF
    Oftentimes renewal of deteriorated pavements relies on stabilization to strengthen pavement materials. Typically, this process takes place with full depth recycling, where in-situ materials receive treatment and mixing with a stabilizing agent to result in a renewed and strengthened base or subbase material. A properly designed and constructed stab ...
  • Use of Forested Habitat Adjacent to Highways by Northern LongEared Bats and other Bats
    Use of Forested Habitat Adjacent to Highways by Northern Long-Eared Bats (and other Bats)
    Foster, Jeffrey ;
    Linden, Dan
    2019-01-01 | PDF
    Bat populations throughout the Northeast have undergone precipitous declines in less than a decade due to the fungal disease white-nose syndrome, with Myotis septentrionalis (Northern long-eared bat, hereafter NLEB) suffering the most severe declines of any species. The overarching objective of the proposed research was to address several major gap ...
  • Transport 2040 Automation Technology Employment The Future of Work
    Transport 2040: Automation, Technology, Employment - The Future of Work
    World Maritime University
    2019-01-01 | PDF
    This report is intended to address the issue of how transportation will change as a result of more technologies and automation. The study that provided the data for this report is the result of intensive research conducted by an interdisciplinary team of experts with input from academia, industry and regulatory bodies during the last 18 months. The ...
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