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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 6441 - 6460 of 36958 results
  • HR Data Tool HRDT A Modular System for Supporting GDOT Human Resource Planning and Decision Making
    HR Data Tool (HRDT): A Modular System for Supporting GDOT Human Resource Planning and Decision Making
    Frost, J. David
    2019-03-01 | PDF
    This report presents the concepts and framework behind Human Resources Data Tool (HRDT), a Java-based software package developed specifically for the Georgia Department of Transportation (GDOT) to aid in analysis of Human Resources (HR) data and for use in planning and decision making. This project is built upon the previous JOB SEEKER (Job Shadowi ...
  • Feasibility of Estimating Commodity Flows on Highways with Existing and Emerging Technologies
    Feasibility of Estimating Commodity Flows on Highways with Existing and Emerging Technologies
    Cetin, Mecit ;
    Sahin, Olcay
    2019-03-01 | PDF
    Understanding the types and volumes of different commodities being hauled over the roadway network is important for freight demand modeling and planning. Categorizing trucks or trailers into subclasses (e.g., container, dry van, refrigerated vans, tank, and car transporter) will help narrow down the type of commodity that is being carried. For exam ...
  • Pedestrian Walking Speeds at Signalized Intersections in Utah
    Pedestrian Walking Speeds at Signalized Intersections in Utah
    Schultz, Grant G. ;
    Eggett, Dennis L.
    2019-03-01 | PDF
    In 2018, it was decided that the current state guidance with regard to pedestrian walking speeds be evaluated for any needed changes, such as adopting the national guidance found in the 2009 Manual on Uniform Traffic Control Devices (MUTCD). To evaluate pedestrian walking speeds at signalized intersections, 15 sites throughout the state of Utah wer ...
  • Evaluation of Adaptive Signal Control TechnologyVolume 3 Comparison of TBC 2017 and ASCT 2017
    Evaluation of Adaptive Signal Control Technology—Volume 3: Comparison of TBC 2017 and ASCT 2017
    Benekohal, Rahim F. ;
    Garshasebi, Behnoush
    2019-03-01 | PDF
    Data were collected at five intersections along the Neil Street corridor in Champaign, Illinois, before deployment of SynchroGreen, an adaptive signal control technology (ASCT). The volume, delay, and queue length data from the field for TBC (time based coordination) 2017 conditions were compared to the data from ASCT (adaptive signal control techn ...
  • 2019 Texas Research Peer Exchange Summary Report
    2019 Texas Research Peer Exchange: Summary Report
    Texas. Dept. of Transportation. Research and Technology Implementation Office
    2019-03-01 | PDF
    The Texas Department of Transportation (TXDOT) hosted a peer exchange in Austin, Texas on March 25-26, 2019 to discuss Freight and Passenger Vehicle Connected and Automated Vehicles (CAV) programs. Attendees included invited participants from other State DOTs (California, Florida, Pennsylvania, Michigan, Arizona, Colorado, and Nevada), the Federal ...
  • Improvement of Material Criteria for Highway Embankment Construction
    Improvement of Material Criteria for Highway Embankment Construction
    Hassani, Mehrdad ;
    Pando, Miguel A.
    2019-03-01 | PDF
    Performance of the highway embankments has been investigated based on two main concerns; slope stability and deformation. To examine embankment performance, parameters obtained from both total stress analysis (TSA) and effective stress analysis (ESA) have been considered, that is stability and deformation have been each investigated under two state ...
  • Dynamic Flashing Yellow Arrow FYA A Study on Variable Left Turn Mode Operational and Safety Impacts Phase III
    Dynamic Flashing Yellow Arrow (FYA) A Study on Variable Left Turn Mode Operational and Safety Impacts Phase III
    Abou-Senna, Hatem ;
    Radwan, Essam
    2019-03-01 | PDF
    The four-section head Flashing Yellow Arrow (FYA) provided an opportunity to advance the operation of the left turn mode at intersections. In phase III of the project, the UCF team further enhanced the decision support system (DSS) by developing an exclusive hardware platform. The hardware platform was developed for two main objectives: first, to p ...
  • Investigation and Guidelines for Mass Concrete Construction Management
    Investigation and Guidelines for Mass Concrete Construction Management
    Cho, Yong Kwon ;
    Gentry, Russell
    2019-03-01 | PDF
    The objective of this research is to characterize the heat generation in mass concrete placements typically encountered by GDOT in its construction projects, to create an analytical method for determining the cooling requirements for mass concrete, and to develop a comprehensive guideline for transportation infrastructure applications. This guideli ...
  • Performance Improvement of High Early Strength HES Concrete for Pavement Replacement Slabs Summary
    Performance Improvement of High Early Strength (HES) Concrete for Pavement Replacement Slabs [Summary]
    Zayed, A
    2019-03-01 | PDF
    University of South Florida identified concrete mixtures and slab base-restraint and placement conditions that can reduce the risk of early-age cracking in concrete pavement repair slabs.
  • GISBased Plume Data Web Portal
    GIS-Based Plume Data Web Portal
    Graettinger, Andrew J. ;
    Smith, Randy K.
    2019-03-01 | PDF
    A GIS-based online portal was developed to store, analyze, and display data from multiple sources pertinent to the ALDOT Coliseum Boulevard site in Montgomery Alabama. These sources comprise various consultants involved with the site including geotechnical companies, water testing labs, law firms, and management personnel from ALDOT/ADEM. The goal ...
  • Review of Biomass Resources and Conversion Technologies for Alternative Jet Fuel Production in Hawaii and Tropical Regions
    Review of Biomass Resources and Conversion Technologies for Alternative Jet Fuel Production in Hawai’i and Tropical Regions
    Morgan, T. ;
    Youkhana, Adel
    2019-03-01 | PDF
    There is increasing interest in developing biobased alternative jet fuels to meet rising aviation demand and address environmental concerns. Uncertainty of oil prices, issues of energy security, and rising greenhouse gas concentrations have spurred the development and acceptance of alternative, economically viable, environmentally sustainable produ ...
  • Implementation of Unmanned Aerial Systems Using CloseRange Photogrammetry Techniques UASCRP for Quantitative Metric and Qualitative Inspection Tasks Related to Roadway Assets and Infrastructure Project Summary
    Implementation of Unmanned Aerial Systems Using Close-Range Photogrammetry Techniques (UAS-CRP) for Quantitative (Metric) and Qualitative (Inspection) Tasks Related to Roadway Assets and Infrastructure [Project Summary]
    Puppala, Anand J. ;
    Congress, Surya S C
    2019-02-28 | PDF
    One of the main objectives of this implementation project was to validate the TxDOT Unmanned Aircraft Systems (UAS) Flight Operations and User’s Manual (FOM) that was developed as part of the research project 0-6944. After the research project was successfully completed, TxDOT granted this implementation project that included nine training sessions ...
  • 20072016 Fatal Traffic Crashes in Alaska Hawaii Idaho and Washington and Characteristics of Traffic Fatalities Involving Hawaiians and CSET Minorities
    2007–2016 Fatal Traffic Crashes in Alaska, Hawaii, Idaho, and Washington and Characteristics of Traffic Fatalities Involving Hawaiians and CSET Minorities
    Prevedouros, Panos D ;
    Bhatta, Kishor
    2019-02-28 | PDF
    Data for this comparative study were collected from the Fatality Analysis and Reporting System (FARS) for the years 2007 to 2016 for the states of Alaska, Hawaii, Idaho, and Washington. The rates of roadway fatalities, especially those of American Indians (which include Aleuts and Eskimos), Guamanians, Samoans, and Native Hawaiians (which include p ...
  • Enhancing Curve Advisory Speed and Curve Safety Assessment Practices Project Summary
    Enhancing Curve Advisory Speed and Curve Safety Assessment Practices [Project Summary]
    Pratt, Michael P. ;
    Geedipally, Srinivas
    2019-02-28 | PDF
    The Texas Department of Transportation (TxDOT) is in the process of conducting several parallel efforts to evaluate rural highway horizontal curves. Following the adoption of the 2011 Texas Manual on Uniform Traffic Control Devices, district personnel are checking and updating posted curve advisory speeds and other curve traffic control devices (e. ...
  • Communications and RadarSupported Transportation Operations and Planning CARSTOP Phase 2 Project Summary
    Communications and Radar-Supported Transportation Operations and Planning (CAR-STOP) [Phase 2 Project Summary]
    Jensen, Darrin ;
    Bhat, Chandra R.
    2019-02-28 | PDF
    A recent report from the National Highway Traffic Safety Administration indicates that more than 80% of all annual car crashes could be prevented by vehicular communications. To that end, the focus of this project was to develop a framework (conceptualizations, processes, procedures, and algorithms) to harness and mature sensing and communication t ...
  • Noncontact Splices at Drilled Shaft to Bridge Column Interface Project Summary
    Non-contact Splices at Drilled Shaft to Bridge Column Interface [Project Summary]
    Mo, Yi-Lung ;
    Masud, Mahadi
    2019-02-28 | PDF
    This research project conducted an experimental and analytical investigation on the behavior of non-contact lap splices at geometrically dissimilar bridge column to drilled shaft connections with regards to non-contact lap splice distance, lap splice length, and amount of transverse reinforcement in the non-contact lap splice zone. Design provision ...
  • To Trust or Not to Trust? A Simulation-Based Experimental Paradigm [supporting datasets]
    Knodler Jr., Michael A. ;
    Christofa, Eleni
    2019-02-26 | PDF
    The automated driving system is expected to enhance traffic safety and flow; however, the system will not be as effective if users do not accept it or do not utilize it appropriately [1]. Appropriate acceptance and use of technology depends on attributes such as perceived risk, mental workload, self-confidence, and appropriate level of trust that m ...
    Dataset
  • 2018 Census of California Water Transit Services
    2018 Census of California Water Transit Services
    Kos, Richard M. ;
    Frey, Nicholas
    2019-02-26 | PDF
    The U.S. Bureau of Transportation Statistics conducts a nationwide census of ferry boat operators for the U.S. Department of Transportation and the collected information is used for statistical purposes. The Caltrans Division of Local Assistance has been asked by the Federal Highway Administration (FHWA) to gather data regarding ferry operations un ...
  • Assessment of the HAWK Crosswalk Traffic Signal
    Assessment of the HAWK Crosswalk Traffic Signal
    Anderson, Ian A.
    ORCID ICON IMG
    2019-02-20 | PDF
    The Pedestrian Hybrid Beacon (PHB) Crosswalk is a type of traffic control system, used to aid pedestrians safely crossing the street and to regulate traffic flow. This study examined the success of the first PHB installed in the state of Vermont. The project location in Colchester, VT, is an area noted for its high traffic flow, as it connects the ...
  • ReinforcementLearningBased Cooperative Adaptive Cruise Control of Buses in the Lincoln Tunnel Corridor With TimeVarying Topology
    Reinforcement-Learning-Based Cooperative Adaptive Cruise Control of Buses in the Lincoln Tunnel Corridor With Time-Varying Topology
    Gao, Weinan ;
    Gao, Jingqin
    2019-02-20 | PDF
    The exclusive bus lane (XBL) is one of the most popular bus transit systems in US. The Lincoln Tunnel utilizes an XBL through the tunnel in the AM peak period. This paper proposes a novel data-driven cooperative adaptive cruise control (CACC) algorithm that aims to minimize a cost function for connected and autonomous buses along the XBL. Different ...
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