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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 5361 - 5380 of 36022 results
  • How Effective Are Toll Roads in Improving Operational Performance? [Supporting Dataset]
    Mathew, Sonu ;
    Pulugurtha, Srinivas S.
    2019-09-01 | ZIP
    The main focus of this research is to develop a systematic analytical framework and evaluate the effect of a toll road on region’s traffic using travel time and travel time reliability measures. The travel time data for the Triangle Expressway in Raleigh, North Carolina, United States was employed for the assessment process. The spatial and tempora ...
    Dataset
  • Pilot Field Study on the Effects of Aircraft Noise on Sleep Around Atlanta International Airport
    Pilot Field Study on the Effects of Aircraft Noise on Sleep Around Atlanta International Airport
    Basner, Mathias ;
    Smith, Michael
    2019-09-01 | PDF
    Aircraft noise can disrupt sleep and impair recuperation. The most recent US investigation on the effects of aircraft noise on sleep was conducted more than 20 years ago. Since then, traffic patterns and noise levels produced by single aircraft have changed substantially. It is therefore important that field studies be conducted in the U.S. to acqu ...
  • Influence of Guayule Resin as a BioBased Additive on AsphaltRubber Binder at Elevated Temperatures
    Influence of Guayule Resin as a Bio-Based Additive on Asphalt–Rubber Binder at Elevated Temperatures
    Hemida, Ahmed ;
    Abdelrahman, Magdy
    2019-09-01 | PDF
    This study seeks to find the influence of replacing a portion of the asphalt–rubber binder with the bio-based material “guayule resin.” This replacement could be beneficial in terms of sustainability, economics, and environmental concerns related to the asphalt industry. Nine asphalt–rubber–guayule binders were investigated to find their rheologica ...
  • Enhanced Moisture Sensitivity Study
    Enhanced Moisture Sensitivity Study
    Solaimanian, Mansour ;
    Milander, Scott
    2019-09-01 | PDF
    The moisture damage susceptibility of four different asphalt concrete mixes from Wisconsin, two with dolomite aggregates and two with siliceous aggregate, was evaluated through laboratory and conditioning testing. One mix was considered a good performing mix and the other three with poor or marginal performance with respect to moisture damage resis ...
  • Handbook for Including Ancillary Assets Transportation Asset Management Programs
    Handbook for Including Ancillary Assets Transportation Asset Management Programs
    Allen, Brad W. ;
    Ram, Prashant
    2019-09-01 | PDF
    This handbook presents a methodology that will aid highway asset owners and maintenance personnel with determining what assets, beyond pavements and bridges, are most important to support their agencies' missions and goals. The methodology prioritizes asset classes and identifies data related to those assets that best support a performance-based ap ...
  • Measuring Temporal and Spatial Exposure of Urban Cyclists to Air Pollutants Using an Instrumented Bike
    Measuring Temporal and Spatial Exposure of Urban Cyclists to Air Pollutants Using an Instrumented Bike
    Schaffer, Kaitlyn G. ;
    Gadsby, April
    2019-09-01 | PDF
    Increased use of active transportation can make direct and indirect contributions toward addressing societal transportation issues. However, in the process of cycling for transportation, cyclists are exposed to multiple pollutants that could adversely impact their health. The goal of this study was to better understand the variation in PM2.5 exposu ...
  • StrainBased Fatigue Crack Monitoring of Steel Bridges using Wireless Elastomeric Skin Sensors
    Strain-Based Fatigue Crack Monitoring of Steel Bridges using Wireless Elastomeric Skin Sensors
    Li, Jian ;
    Bennett, Caroline
    2019-09-01 | PDF
    Fatigue cracks that develop in steel highway bridges under repetitive traffic loads are one of the major mechanisms that degrade structural integrity. If bridges are not appropriately inspected and maintained, fatigue cracks can eventually lead to catastrophic failures, in particular for fracture-critical bridges. Bridge owners, such as state Depar ...
  • HumanAutomation Teaming Unintended Impacts and Mitigations for Degraded NextGen Operations
    Human-Automation Teaming: Unintended Impacts and Mitigations for Degraded NextGen Operations
    Smith, Philip J. ;
    Baumann, Emily
    2019-09-01 | PDF
    The goal of this report is to provide insights regarding the potential unintended negative impacts that the introduction of automation can have on human performance and resultant system behavior when a decision support system fails or exhibits degraded performance. It further provides human factors guidance on methods to mitigate potential risks to ...
  • Investigation of the Accuracy of Alcohol and Drug Involvement Reporting
    Investigation of the Accuracy of Alcohol and Drug Involvement Reporting
    Staats, William
    2019-09-01 | PDF
    Researchers compared the 2013 to 2017 fatal crash data from the KSP database to the crash data from the FARS database to check the consistency and accuracy of alcohol and drug involvement reporting for drivers in the KSP database. The indications of alcohol and drug involvement in the FARS database were used as the ground truth due to the inclusion ...
  • Effectiveness of ExteriorBeam RotationPrevention Systems for Bridge Deck ConstructionPhase II
    Effectiveness of Exterior-Beam Rotation-Prevention Systems for Bridge Deck Construction—Phase II
    Hui, Li ;
    Hraib, Faress
    2019-09-01 | PDF
    During bridge deck construction, construction loads are transferred through the overhang-formwork system into the girder system, resulting in significant torsional moments acting on the exterior girder. In some cases, these torsional moments can lead to excessive exterior-girder rotation, thin bridge decks, and cause potential safety and maintenanc ...
  • Civil Engineering Support for the Traffic Monitoring Program
    Civil Engineering Support for the Traffic Monitoring Program
    Moses, Ren
    2019-09-01 | PDF
    Monitoring traffic through extensive collection and efficient storage of traffic data is crucial for improving safety and efficiency of Florida highways. To this end, the Florida Department of Transportation’s Office of Transportation Data and Analytics operates temporary and permanent count stations strategically placed at various locations on the ...
  • Development of Safety Performance Functions for Restricted Crossing UTurn RCUT Intersections Summary
    Development of Safety Performance Functions for Restricted Crossing U-Turn (RCUT) Intersections [Summary]
    Ozguven, Eren Erman
    2019-09-01 | PDF
    Florida State University researchers developed guidance to assist planners in deciding where to place restricted crossing U-turns (RCUTs).
  • Improving Pedestrian Infrastructure Inventory in Massachusetts Using Mobile LiDAR
    Improving Pedestrian Infrastructure Inventory in Massachusetts Using Mobile LiDAR
    Ai, Chengbo ;
    Hou, Qing
    2019-09-01 | PDF
    Pedestrian infrastructure is one of the most vital transportation infrastructures for pedestrians and wheelchair users who rely on quality sidewalks to facilitate safe and uninterrupted trips in their every day lives. To meet the obligations of the Americans with Disabilities Act (ADA) Transition Plan and to make informed investment decisions in tr ...
  • Development of a Test Method for Assessing the Performance of Vehicular Traffic Signal Assemblies during Hurricane Force Winds Summary
    Development of a Test Method for Assessing the Performance of Vehicular Traffic Signal Assemblies during Hurricane Force Winds [Summary]
    Azizinamini, Atorod
    2019-09-01 | PDF
    Florida International University researchers investigated methods for testing the behavior of traffic signals in high winds.
  • RemoteControlled Vessel Provides Safe and Accurate Inspection for Bridge Scour Summary
    Remote-Controlled Vessel Provides Safe and Accurate Inspection for Bridge Scour [Summary]
    Schroeder, Brian
    2019-09-01 | PDF
    MDOT routinely inspects bridges for scour around abutments and piers. These inspections are typically conducted from a boat during high-flow events, with inspectors probing the channel bottom or using sonar techniques to determine the extent of the scour. This can be very dangerous for bridge inspectors. As an alternative, an unmanned surface vesse ...
  • Human Factors Study on the Use of Colors for Express Lane Delineators
    Human Factors Study on the Use of Colors for Express Lane Delineators
    Abou-Senna, Hatem ;
    Radwan, Essam
    2019-09-01 | PDF
    The use of express lanes (ELs) in freeway traffic management has seen increasing popularity throughout the U.S., particularly in Florida. These lanes aim at increasing the efficiency of transportation system management and operations (TSM&O) to provide a more reliable trip. An important component of ELs is the channelizing devices used to delineate ...
  • Erosion and Sediment Control Design Guidance
    Erosion and Sediment Control Design Guidance
    Lampert, David ;
    Ahmadvand, Maryam
    2019-09-01 | PDF
    Construction projects typically require mass clearing and grading, causing many site areas to be unstable. As a result, they lack ground cover to protect against rainfall and runoff, which results in soil degradation and erosion. Erosion introduces nonpoint source suspended solids pollution (NPS) into water bodies that diminish water quality and re ...
  • Autonomous Vehicle Feasibility Study Final Report
    Autonomous Vehicle Feasibility Study – Final Report
    Jensen, Mark ;
    Andersen, Dan
    2019-09-01 | PDF
    Massive employment growth at the Tahoe Reno Industrial Center (TRIC), with housing stock primarily in the Reno/Sparks area – and a constrained transportation corridor (I-80) connecting the two – is leading to significant congestion with the potential to slow desired economic development in the region. In addition to other strategies under considera ...
  • A New Spectrum Matching Procedure for the Central United States
    A New Spectrum Matching Procedure for the Central United States
    Pezeshk, Shahram ;
    Sedaghati, Farhad
    2019-09-01 | PDF
    Central and eastern North America (CENA) is considered to be a moderately active region, but it suffers from a lack of recorded earthquakes in the magnitude-distance range of engineering interest. In this report, region-specific synthetic strong ground motion time histories are generated using a new and improved stochastic summation of Green's func ...
  • Development of Statistical Models to Predict the Compressibility of Floridas Soils
    Development of Statistical Models to Predict the Compressibility of Florida’s Soils
    Nam, Boo Hyun ;
    Shamet, Ryan
    2019-09-01 | PDF
    The magnitude of the overall settlement depends on several variables such as compression index (Cc), recompression index (Cr), and secondary compression index (Cα), which are determined by a consolidation test. However, the test is time consuming and labor intensive. Correlations have been developed to approximate these compressibility indexes to s ...
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