Now showing items 193-212 of 513

    • Expanded Research and Development of an Enhanced Rear Signaling System for Commercial Motor Vehicles 

      Schaudt, William A.; Bowman, Darrell Scott; Stone, S. R.; Perez, M. C. (United States. Federal Motor Carrier Safety Administration. Office of Analysis, Research, and Technology, 2014-04)
      The purpose of the current study was to further develop and refine the prototype Enhanced Rear Signaling (ERS) system that was developed during the previous Phase III effort. Expanded development efforts for the ERS system ...
    • An Exploration of Driver Behavior During Turns at Intersections (for Drivers in Different Age Groups) 

      Angell, Linda; Aitch, Sudipto; Antin, Jonathan F.; Wotring, Brian (2015-06-23)
      A two-phase study of driver behavior at intersections was conducted using a naturalistic paradigm. In Phase 1, the behavior of teen, middle-aged, and older drivers was compared for left turns at three types of left turns ...
    • Exploring the Science of Retroreflectivity: Curriculum for Grades 4 through 6 

      Finley, Melisa D.; Hanover, Stephanie; Chrysler, Susan T. (Safe-D: Safety Through Disruption, 2018-10)
      According to the United States Department of Commerce, careers in science, technology, engineering, and mathematics (STEM) are growing faster than occupations in other areas. However, in-class academic concepts can seem ...
    • Extending Naturalistic Driving Research to a Patrol Car: A Pilot Project 

      Garrison, T. M.; Carruth, Daniel W. (2014-08-25)
    • Fact Sheets 

      Tidwell, Scott; Fitchett, Vikki L.; Blanco, Myra (National Surface Transportation Safety Center for Excellence, 2017-12-06)
      To extend its public outreach, the National Surface Transportation Safety Center for Excellence has created concise fact sheets describing research findings important to surface transportation safety. To date, fact sheets ...
    • Factors Affecting the Performance of Pavement Preservation Treatments 

      Visintine, Beth A.; Hicks, R. Gary; Cheng, DingXin; Elkins, Gary E. (2015-06-04)
      Pavement preservation has become a very important tool box for agencies to maintain their roadway system. Federal Highway Administration (FHWA) funded the project titled "Factors Affecting the Performance of Pavement ...
    • Factors Influencing Learner Permit Duration 

      Ehsani, Johnathon P.; Li, Kaigang; Grant, Brydon J. B.; Gershon, Pnina; Klauer, Sheila G.; Dingus, Thomas A.; Simons-Morton, Bruce G. (MDPI, 2016-12-22)
      An increasing number of countries are requiring an extended learner permit prior to independent driving. The question of when drivers begin the learner permit period, and how long they hold the permit before advancing to ...
    • Factors Surrounding Child Seat Usage in Rideshare Services 

      Owens, Justin M.; Womack, Katie N.; Barowski, Laura (Safe-D: Safety Through Disruption, 2019-09)
      This project represents a collaborative, multimodal effort to understand the current state of child passenger safety with respect to rideshare vehicles, with the aim of using this information to develop an effective set ...
    • A Fair Division Approach to Performance-based Cross-Asset Resource Allocation 

      Porras-Alvarado, Juan D.; Han, Zhe; Zhang, Zhanmin (2015-06-04)
      Resource allocation mechanisms have become a major issue for transportation agencies in the United States and around the world. In order to meet budgetary restrictions resulting from reductions in funding, transportation ...
    • Fatigue analyses: from 16 months of naturalistic commercial motor vehicle driving data 

      Wiegand, Douglas M.; Hanowski, Richard J.; Olson, Rebecca L. (Rebecca Lynn); Melvin, Whitney (Virginia Tech. Virginia Tech Transportation Institute, 2008-05-31)
      Under the sponsorship of the National Surface Transportation Safety Center for Excellence, an existing naturalistic data set from the Drowsy Driver Warning System Field Operational Test (DDWS FOT) was expanded and analyzed ...
    • Fatigue and Distraction in Occupational Light Vehicle Drivers 

      Soccolich, Susan A.; Hickman, Jeffrey Scott; Hanowski, Richard J. (National Surface Transportation Safety Center for Excellence, 2017-10-25)
      Occupational drivers are a unique subset of the driving population, as driving per se is not their primary job duty, but can nonetheless encompass a large portion of their working day. These occupational drivers make sales ...
    • Fatigue Assessment for the Failed Bridge Deck Closure Pour at Mile Marker 43 on I-81 

      Rivera, Elias; Abbas, Ebrahim K.; Wright, William J.; Weyers, Richard E.; Roberts-Wollmann, Carin L. (Virginia. Department of Transportation, 2014-04)
      Fatigue of reinforcing steel in concrete bridge decks has not been identified as a common failure mode. Generally, the stress range occurring in reinforcing steel is below the fatigue threshold and infinite fatigue life ...
    • Fatigue Life Characterization of Superpave Mixtures at the Virginia Smart Road 

      Al-Qadi, Imad L.; Diefenderfer, Stacey D.; Loulizi, Amara (Virginia Center for Transportation Innovation and Research, 2005-08)
      Laboratory fatigue testing was performed on six Superpave HMA mixtures in use at the Virginia Smart Road. Evaluation of the applied strain and resulting fatigue life was performed to fit regressions to predict the fatigue ...
    • Feasibility of Using In-Vehicle Video Data to Explore How to Modify Driver Behavior That Causes Nonrecurring Congestion: SHRP 2 

      Rakha, Hesham A.; Du, Jianhe; Park, Sangjun; Guo, Feng; Doerzaph, Zachary R.; Viita, Derek; Golembiewski, Gary A.; Katz, Bryan; Kehoe, Nicholas; Rigdon, H. (National Research Council (U.S.). Transportation Research Board, 2011)
      Nonrecurring congestion is traffic congestion due to nonrecurring causes, such as crashes, disabled vehicles, work zones, adverse weather events, and planned special events. According to data from the Federal Highway ...
    • Feasibility Study for Using Piezoelectric-Based Weigh-In-Motion (WIM) System on Public Roadway 

      Xiong, Haocheng; Zhang, Yinning (MDPI, 2019-07-31)
      Weigh-in-Motion system has been the primary selection of U.S. government agencies as the weighing enforcement for decades to protect the road pavement. In recent years, the number of trucks has increased by about 40% and ...
    • Field and Modeling Framework and Case Study of Truck Weigh Station Operations: Final report 

      Katz, Abryan J.; Rakha, Hesham A. (Virginia Tech. Virginia Tech Transportation Institute, 2002-01)
      Weigh-in-Motion (WIM) systems improve the capacity of weigh station operations significantly by screening trucks while traveling at high speeds and only requiring trucks within a threshold of a maximum permissible gross ...
    • Field Implementation Feasibility Study of Cumulative Travel-Time Responsive Intersection Control Algorithm under Connected Vehicle Technology 

      Choi, Saerona; Park, Byungkyu Brian; Lee, Joyoung (Connected Vehicle/Infrastructure University Transportation Center (CVI-UTC), 2016-03-31)
      This project utilized the Connected Vehicle (CV) environment, which provides two-way wireless communications between vehicles and infrastructure, to (1) improve the Cumulative Travel-time Responsive (CTR) Intersection ...
    • Field Investigation of High Performance Pavements in Virginia 

      Flintsch, Gerardo W.; Al-Qadi, Imad L.; Loulizi, Amara; Samer Lahouar; McGhee, Kevin K.; Trenton Clark (Virginia Center for Transportation Innovation and Research, 2005-01-01)
      This study evaluated 18 pavement sections located in high-traffic highways in Virginia to find a premium pavement design with a life span of 40 years or more using current and past field experience. The selected pavement ...
    • Field Performance of High Friction Surfaces 

      de León Izeppi, Edgar; Flintsch, Gerardo W.; McGhee, Kevin K. (Virginia Center for Transportation Innovation and Research, 2010-06-01)
      This report describes an evaluation of high friction surface (HFS) systems. The goal of this evaluation was to develop guidance for agencies when considering whether an HFS was an appropriate solution when addressing ...
    • Field Testing of Eco-Speed Control Using V2I Communication 

      Rakha, Hesham Ahmed; Chen, Hao; Almannaa, Mohammed; Kamalanathsharma, Raj Kishore; El-Shawarby, Ihab; Loulizi, Amara (Connected Vehicle/Infrastructure University Transportation Center (CVI-UTC), 2016-04-15)
      This research focused on the development of an Eco-Cooperative Adaptive Cruise Control (Eco-CACC) System and addressed the implementation issues associated with applying it in the field. The Eco-CACC system computes and ...