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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 5861 - 5880 of 36053 results
  • Assessing the Impact of Smartphone Usage While Driving in Work Zones [supporting datasets]
    Valdes Diaz, Didier M. ;
    Lopez del Puerto, Carla
    2019-04-05 | ZIP
    The use of smartphones has been increasing over the last decade. The increase of smartphone usage by drivers is particularly concerning in highway work zones when operations and maintenance activities are being performed. This research aims to investigate the impact of using smartphone applications, such as a global positioning system (GPS), when d ...
    Dataset
  • Using Simulation to Assess Conflicts Between Bicyclists and Right-Turning Vehicles [supporting datasets]
    Christofa, Eleni ;
    Knodler Jr., Michael A.
    2019-04-02 | ZIP
    Protected bike lanes, or cycle tracks, are increasing in popularity across the nation. However, despite the documented benefits of protected bike lanes, including safer cycling and increased ridership among differing populations of bicyclists, there remain ongoing concerns about potential conflicts between bicycles and vehicles when they merge back ...
    Dataset Supporting Files
  • Driver Behavior and Performance with In-Vehicle Display Based on Speed Compliance [supporting datasets]
    Knodler, Michael A. ;
    Fitzpatrick, Cole
    2019-04-01 | ZIP
    Traffic-control devices are integral to driver-to-infrastructure and vehicle-to-infrastructure interactions. The non-conformation with (or nonperception of) signage by the driver leads to several compounded safety problems. The need exists for a more robust, low-cost, and user-centric mechanism of delivering information to the driver that can direc ...
    Dataset
  • Analysis of the Relationship of Roadside Inspections on Large Truck Crashes Research Brief
    Analysis of the Relationship of Roadside Inspections on Large Truck Crashes [Research Brief]
    Lu, Pan ;
    Lantz, Brenda Michelle
    2019-04-01 | PDF
    Researchers want to better understand the relationships between roadside inspection data and safety performance data for large trucks. The research will provide insight into those relationships for various-sized motor carriers. An improved understanding about the importance of various factors (driver characteristics, trucking company characteristic ...
  • Development and Mash TL4 Evaluation of TxDOT Rubber Mounted Single Slope Barrier
    Development and Mash TL-4 Evaluation of TxDOT Rubber Mounted Single Slope Barrier
    Abu-Odeh, Akram Y. ;
    Brackin, Michael S.
    2019-04-01 | PDF
    Median barriers are used as a separation between two opposing traffic lanes on divided highways. Typically, rigid median barriers are made of reinforced concrete using safety or single slope profiles. These barriers are positively constructed as an integral part of the roadway through starter bars or other construction means. A damaged rigid median ...
  • Traffic Signal Consensus Control
    Traffic Signal Consensus Control
    Lafferriere, Gerardo
    ORCID ICON IMG
    2019-04-01 | PDF
    We introduce a model for traffic signal management based on network consensus control principles. The underlying principle in a consensus approach is that traffic signal cycles are adjusted in a distributed way so as to achieve desirable ratios of queue lengths throughout the street network. This approach tends to reduce traffic congestion due to q ...
  • Developing Predictive Border Crossing Delay Models
    Developing Predictive Border Crossing Delay Models
    Lin, Lei ;
    Bartlett, Andrew
    2019-04-01 | PDF
    In recent years, and as a result of the continued increase in travel demand across the border coupled with the need for tighter security and inspection procedures after September 11, border crossing delay has become a critical problem with tremendous economic and social costs. This project aims at taking advantage of the wealth of data, now availab ...
  • InCabin Fine Particulate Matter Exposure during Paratransit Transport
    In-Cabin Fine Particulate Matter Exposure during Paratransit Transport
    Samoylov, Alex V ;
    Schaffer, Kaitlyn G.
    2019-04-01 | PDF
    The effects of fine particulate matter (PM) exposure on human health depend on age as well as preexisting heart or lung diseases, and older adults are at greater risk for developing these diseases. Many older individuals have limited transportation options and may rely on mobility services, such as paratransit transport, to meet their mobility need ...
  • Development of a Balanced Asphalt Mixture Design Procedure for New Mexico
    Development of a Balanced Asphalt Mixture Design Procedure for New Mexico
    Tarefder, Rafiqul A. ;
    Ahmad, Mohiuddin
    2019-04-01 | PDF
    A balanced mix is a mix that satisfies both rutting and cracking criteria or limiting values. Though rutting criteria of NMDOT mixes was obtained from a recently completed project, the cracking criteria of NMDOT mixes were not available. Therefore, extensive literature was gathered in this study to come up with limiting values of different types of ...
  • Enhancing the Sustainability of Gulf Intracoastal Waterway Dredge Material Placement Areas
    Enhancing the Sustainability of Gulf Intracoastal Waterway Dredge Material Placement Areas
    Kruse, C. James ;
    Mostafavi, Ali
    2019-04-01 | PDF
    responsibility of the state of Texas. Given population and industrial growth along the coastline and the continual need for dredging, it is important to use the sites efficiently and ensure their integrity. This research provided the analytical framework and methodology that will enable the Texas Department of Transportation to develop a strategic ...
  • Impacts of Freight Consolidation and Truck Sharing on Freight Mobility [supporting datasets]
    Liu, Tieming ;
    Zhao, Chaoyue
    2019-04-01 | ZIP
    The trucking industry is an important sector of the U.S. economy. However, it is quite fragmented, hindering the efficiency of cargo transportation and the ability for small carriers to identify demands to fill full truck loads. The focus of this research is to study models and algorithms in order to aid online freight marketplaces to identify effi ...
    Dataset
  • Urban Traffic Signal Control With Connected and Automated Vehicles A Survey
    Urban Traffic Signal Control With Connected and Automated Vehicles: A Survey
    Guo, Qiangqiang ;
    Li, Li
    2019-04-01 | PDF
    Inefficient traffic control is pervasive in modern urban areas, which would exaggerate traffic congestion as well as deteriorate mobility, fuel economy and safety. In this paper, we systematically review the potential solutions that take advantage of connected and automated vehicles (CAVs) to improve the control performances of urban signalized int ...
  • Who Do We Miss by Moving Travel Surveys Online Assessments From Vermont
    Who Do We Miss by Moving Travel Surveys Online? Assessments From Vermont
    Aultman-Hall, Lisa ;
    Dowds, Jonathan
    2019-04-01 | PDF
    Online travel surveys are increasingly common because of cost, user burden, and geocoding advantages. Consequently, it is important to ask how online survey samples compare to paper survey samples. This study compares paper and online responses to a 2016, state-wide, Vermont transportation planning survey. Internet and smartphone access were analyz ...
  • Best Practices for Estimating Camber of Bulb T and Florida Girders
    Best Practices for Estimating Camber of Bulb T and Florida Girders
    Tomley, David A
    2019-04-01 | PDF
    MDOT has experienced under-camber prestressed concrete girders recently on several projects that have led to construction delays and/or increased construction costs. The need to address current practices for estimating beam camber were addressed through; literature search, survey of other State DOT current practices, historic material and beam camb ...
  • Effectiveness of Innovative Pavement Markings in Facilitating Safe Bicycle Travel
    Effectiveness of Innovative Pavement Markings in Facilitating Safe Bicycle Travel
    Ohlms, Peter B. ;
    Kweon, Young-Jun
    2019-04-01 | PDF
    Bicycle accommodations are an increasingly important component of the transportation system, and research has provided growing evidence that cities with higher bicycling (and walking) rates have better road safety records. In an effort to facilitate bicycle travel through intersections, newer traffic control devices have been applied, including the ...
  • Seismic Performance of Highway Embankments
    Seismic Performance of Highway Embankments
    Mahmoud, Hussam ;
    Hassan, Emad
    2019-04-01 | PDF
    In order to predict the functionality of transportation networks following a seismic event, performance of embankments under real ground motions needs to be well understood. Understanding of such performance can be realized using experimental testing or finite element analysis. This study aims to add to existing literature through conducting analyt ...
  • Study the Impacts of Freight Consolidation and Truck Sharing on Freight Mobility
    Study the Impacts of Freight Consolidation and Truck Sharing on Freight Mobility
    Liu, Tieming ;
    Zhao, Chaoyue
    2019-04-01 | PDF
    The trucking industry is an important sector of the U.S. economy. However, it is quite fragmented, hindering the efficiency of cargo transportation and the ability for small carriers to identify demands to fill full truck loads. The focus of this research is to study models and algorithms in order to aid online freight marketplaces to identify effi ...
  • Driver Behavior and Performance with InVehicle Display Based on Speed Compliance
    Driver Behavior and Performance with In-Vehicle Display Based on Speed Compliance
    Knodler, Michael A. ;
    Christofa, Eleni
    2019-04-01 | PDF
    Traffic-control devices are integral to driver-to-infrastructure and vehicle-to-infrastructure interactions. The non-conformation with (or nonperception of) signage by the driver leads to several compounded safety problems. The need exists for a more robust, low-cost, and user-centric mechanism of delivering information to the driver that can direc ...
  • Railway Right of Way Monitoring and Early Warning System RailMEWS Based on Satellite and Aerial Imagery
    Railway Right of Way Monitoring and Early Warning System (RailMEWS) Based on Satellite and Aerial Imagery
    Rizos, Dimitris C ;
    Mullen, Robert L
    2019-04-01 | PDF
    This report presents the findings of one-year study that explores the feasibility to use commercially available satellite and other aerial imagery to monitor the right of way of railroads for effects and conditions that could potentially trigger landslides and other geotechnical failures. Two major objectives have been identified: (1) Establish the ...
  • Principal and Considerations for Design of Small Unmanned Aerial Vehicles for Inspection and Survey
    Principal and Considerations for Design of Small Unmanned Aerial Vehicles for Inspection and Survey
    Mardanpour, Pezhman ;
    Mehrabi, Armin
    2019-04-01 | PDF
    This study aims to identify the principal and considerations for the design of Small Unmanned Aerial Vehicles for inspection and survey processes. It provides a background of the current stage of the technologies and design parameters that should be taken into consideration for different aerial configurations. Additionally, a very robust design too ...
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