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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 4981 - 5000 of 36958 results
  • Highway Safety Manual Safety Performance Functions Roadway Calibration Factors Roadway Segments Phase 2 Part 1
    Highway Safety Manual Safety Performance Functions & Roadway Calibration Factors: Roadway Segments Phase 2, Part 1
    Khattak, Asad ;
    Ahmad, Numan
    2020-06-30 | PDF
    To enhance safety, the Tennessee Department of Transportation (TDOT) is in the process of adopting the Highway Safety Manual (HSM) as a resource to facilitate decision making based on the safety performance of its roadways. The predictive models which are known as Safety Performance Functions (SPFs) are used to forecast the expected crash frequency ...
  • Improving Mobility of Low Vision People with SuperReality Glasses
    Improving Mobility of Low Vision People with Super-Reality Glasses
    Cai, Yang
    ORCID ICON IMG
    2020-06-29 | PDF
    This project is to develop an assistive technology for the people with vision disabilities of central field loss (CFL) and low contrast sensitivity (LCS). This technology includes a pair of super-reality (SR) glasses with enhanced image contrast, for example, highlighting objects, detect signs, and lanes. The authors call the technology “super-real ...
  • Educational and Workforce Development Through Creation of Programs in Transportation To Generate Future Careers for Our Students in Navajo Nation Region [supporting datasets]
    Ehteshami, Gholam R
    ORCID ICON IMG
    2020-06-28 | PDF
    Navajo Technical University (NTU) in New Mexico, has made a partnership with the Tran-SET regional center at Louisiana State University, LSU. We have provided learning and training the Native American students in transportation-related Industries to some of STEM students at NTU through these partnerships opportunities. The program was designed and ...
    Dataset Supporting Files
  • Active Transportation and Community Health Impacts of Automated Vehicle Scenarios An Integration of the San Francisco Bay Area Activity Based Travel Demand Model and the Integrated Transport and Health Impacts Model ITHIM
    Active Transportation and Community Health Impacts of Automated Vehicle Scenarios: An Integration of the San Francisco Bay Area Activity Based Travel Demand Model and the Integrated Transport and Health Impacts Model (ITHIM)
    Jaller, Miguel ;
    Pourrahmani, Elham
    2020-06-25 | PDF
    This study evaluates the potential human health impacts from connected and autonomous vehicles (CAVs) scenarios in the San Francisco, Bay Area. The study concentrates on impacts derived from the effects of CAVs on travel demand, safety, and environmental emissions. The study combines an extensive literature review about the extent of such potential ...
  • Examining Senior Drivers Attitudes Towards Advanced Driver Assistance Systems after Naturalistic Exposure
    Examining Senior Drivers’ Attitudes Towards Advanced Driver Assistance Systems after Naturalistic Exposure
    Liang, Dan ;
    Lau, Nathan
    2020-06-18 | PDF
    The increasing number of senior drivers may introduce new road risks due to age-related declines in physical and cognitive abilities. Advanced driver assistance systems (ADAS) have been proposed as solutions to minimize age-related declines, thereby increasing both senior safety and mobility. This study examined factors that influence seniors’ atti ...
  • Integrating Driving Simulator Experiment Data With a MultiAgent Connected Automated Vehicles Simulation MACAVs Platform to Quantify Improved Capacity
    Integrating Driving Simulator Experiment Data With a Multi-Agent Connected Automated Vehicles Simulation (MA-CAVs) Platform to Quantify Improved Capacity
    Wang, Haizhong ;
    Hurwitz, David
    2020-06-15 | PDF
    Autonomous vehicles (AVs) at varying market penetration rates will change traffic flow and highway performance. At AV market penetration rates of between 0 percent and 100 percent, human-driven vehicles (HVs) will be interacting with AVs. However, little is known about how HVs interact with AVs. Using the Oregon State University Driving Simulator, ...
  • Efficient Extraction and Evaluation of Complex Pavement Markings from Mobile Laser Scan Data
    Efficient Extraction and Evaluation of Complex Pavement Markings from Mobile Laser Scan Data
    Jung, Jaehoon ;
    Olsen, Michael J.
    2020-06-15 | PDF
    Pavement markings are an important traffic control device, enhancing both the safety and efficiency of various modes of transportation by aiding vehicles, bicyclists, and pedestrians in effectively navigating the transportation network. In this Pacific Northwest Transportation Consortium (PacTrans) project, the authors developed a new framework to ...
  • Integrated Implementation of Innovative Intersection Designs [supporting datasets]
    Rouphail, Nagui M. ;
    Cunningham, Christopher M.
    2020-06-10 | PDF
    These files belong to a research project on evaluating different bicycle and pedestrian crossing options at Continuous Flow Intersections (CFI). These are the simulation models for different CFI crossing alternatives for pedestrians and bicycles. Three parameters were varied to create the scenario: a) number of displaced left turn legs (4 vs. 2) b) ...
    Dataset Supporting Files
  • Uncertainty Quantification of Cyber Attacks on Connected Vehicles and Infrastructure (Part 1) [supporting datasets]
    Martin, James J ;
    Comert, Gurcan
    2020-06-08 | PDF
    Multiple studies have explored different forms of connected vehicle applications, such as queue warning and cooperative adaptive cruise control (CACC), in standard wireless access in vehicular environments (WAVE), and dedicated short-range communication (DSRC) network environments. A major focus of the ongoing research is to consider a hybrid vehic ...
    Dataset Supporting Files
  • VisionBased Sensor System for Site Monitoring WrongWay Driving Phase 1
    Vision-Based Sensor System for Site Monitoring: Wrong-Way Driving, Phase 1
    Lasky, Ty A. ;
    Yen, Kin
    2020-06-05 | PDF
    This report presents results for research on a Vision-Based Site Monitoring (VBSM) system for monitoring Wrong-Way Driving (WWD) events. This system integrates a camera, solar power panels, and a modem into a pole-mounted package for deployment on freeway exit ramps to monitor for WWD events. The system incorporates on-camera analytics for WWD dete ...
  • Transportation Equity Scorecard A Tool for Project Screening and Prioritization
    Transportation Equity Scorecard: A Tool for Project Screening and Prioritization
    Williams, Kristine M. ;
    Kramer, Jeff
    2020-06-03 | PDF
    Equity is a representation of fairness in the distribution of benefits and burdens. It is an important expectation of the public in transportation planning and project selection, as these activities can have significant equity impacts. Increasingly, metropolitan planning organizations (MPOs) and local governments are evaluating both plans and proje ...
  • Assessing CloseRange Photogrammetry as an Alternative for LiDAR Technology at UDOT Divisions
    Assessing Close-Range Photogrammetry as an Alternative for LiDAR Technology at UDOT Divisions
    Cross, Chandler ;
    Farhadmanesh, Mohammad
    2020-06-01 | PDF
    LiDAR (Light Detection and Ranging) is a mature and efficient technology currently used by various divisions of UDOT (asset management, traffic control, pavement, construction, etc.). Some of the current applications of LiDAR at UDOT (as well as other DOTs) include: asset management for roads and buildings, quality control of pavements and other in ...
  • Improving Transportation Information Resilience Error Estimation for Networked Sensor Data
    Improving Transportation Information Resilience: Error Estimation for Networked Sensor Data
    Fan, Yueyue ;
    Yang, Han
    2020-06-01 | PDF
    Nowadays, the effectiveness of any smart transportation management or control strategy would heavily depend on reliable traffic data collected by sensors. Two problems regarding sensor data quality have received attention: first, the problem of identifying malfunctioning sensors; second, reconstruction of traffic flow. Most existing studies concern ...
  • Freight Load Balancing and Efficiencies in Alternative Fuel Freight Modes
    Freight Load Balancing and Efficiencies in Alternative Fuel Freight Modes
    Ioannou, Petros ;
    Giuliano, Genevieve
    2020-06-01 | PDF
    The current freight transportation network is highly unbalanced as routing decisions are made by individual users without coordination. Certain routes may become congested when chosen based on current traffic information without any anticipation that if other users do the same, these routes are no longer the best. This project developed a centrally ...
  • Development of a LifeCycle Cost Analysis Tool for Improved Maintenance and Management of Bridges
    Development of a Life-Cycle Cost Analysis Tool for Improved Maintenance and Management of Bridges
    Alipour, Alice ;
    Shafei, Behrouz
    2020-06-01 | PDF
    The Moving Ahead for Progress in the 21st Century Act (MAP-21) of 2012 requires states to develop and implement a transportation asset management plan (TAMP) for their respective portions of the National Highway System (NHS). Life-cycle cost and risk management analyses must be included in a state’s TAMP. As defined in the 1998 Transportation Equit ...
  • The Impacts of Automated Vehicles on Center City Parking Demand
    The Impacts of Automated Vehicles on Center City Parking Demand
    Zhang, Michael ;
    Chai, Huajun
    2020-06-01 | PDF
    The potential for automated vehicles (AVs) to reduce parking in city centers has generated much excitement among urban planners. AVs could drop-off (DO) and pick-up (PU) passengers in areas where parking costs are high: personal AVs could return home or park in less expensive locations, and shared AVs could serve other passengers. Reduced on-street ...
  • Safety Benefits and Best Practices for Intersection Lighting
    Safety Benefits and Best Practices for Intersection Lighting
    Li, Yingfeng (Eric) ;
    Bhagavathula, Rajaram
    2020-06-01 | PDF
    Nighttime safety continues to be a major concern for transportation agencies across the country. Roadway lighting has been widely used as a countermeasure for nighttime crashes. However, safety engineers and researchers frequently lack effective tools when determining exactly how lighting should be optimized to maximize safety while conserving ener ...
  • Highway Safety Manual Training
    Highway Safety Manual Training
    Sun, Carlos ;
    Edara, Praveen K.
    2020-06-01 | PDF
    Safety has become an area of increasing focus in all aspects of transportation planning, design, construction, and operations. Transportation legislations, such as the SAFETEA-LU Act (2005) and the FAST Act (2015), have promoted data-driven safety analysis in various programs. The publication of the Highway Safety Manual (2010) and the Supplement ( ...
  • How Do Car Donation Programs Effect Travel Income and Healthcare Access Among Poor Families
    How Do Car Donation Programs Effect Travel, Income, and Healthcare Access Among Poor Families?
    Klein, Nicholas J.
    ORCID ICON IMG
    2020-06-01 | PDF
    What happens when you give poor families a car? For decades, scholars have suggested that giving poor families cars can help them move up the economic ladder, yet these programs have rarely been studied. My research will study changes in poor families’ lives when they receive a car from the largest vehicle donation program in the country. I intervi ...
  • Installation and Initial Evaluation of Paving Fabric Interlayers for Mitigating Reflective Cracking in Pavements
    Installation and Initial Evaluation of Paving Fabric Interlayers for Mitigating Reflective Cracking in Pavements
    Nair, Harikrishnan ;
    Habbouche, Jhony
    2020-06-01 | PDF
    Propagation of cracks from existing pavements into a new asphalt concrete overlay (reflective cracking) is a major problem for both rigid and flexible pavements. Reflective cracking in pavements compromises ride quality and reduces the service life of the pavement. Reflective cracking of the asphalt layer over jointed concrete pavement is a perenni ...
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