Now showing items 1-20 of 68

    • 100-car reanalysis : summary of primary and secondary driver characteristics 

      McClafferty, Julie; Hankey, Jonathan M. (Virginia Tech. Virginia Tech Transportation Institute, 2010-08-27)
      This project's goal was to build a complete trip file inventory for the 100-Car data set... Data points collected for each file include Driver ID (with new IDs created as new secondary drivers were found), Ambient Lighting, ...
    • Active and Adaptive Roadway Delineation Systems 

      Williams, Brian; Gibbons, Ronald B.; Medina, Alejandra (National Surface Transportation Safety Center for Excellence, 2017-10-13)
      Heavy fog presents a significant safety hazard to drivers by reducing their ability to see the roadway and other vehicles. Even so, drivers often fail to adjust their speed to account for the reduced visibility, resulting ...
    • Application of Proximity Sensors to In-vehicle Data Acquisition Systems 

      Krothapalli, Ujwal; Stowe, Loren; Doerzaph, Zac; Petersen, Andy (National Surface Transportation Safety Center for Excellence, 2018-05-02)
      Naturalistic driving studies rely on human data reductionists to manually review and annotate driving behaviors. This work is time-consuming, and algorithms that could scan and categorize video data could make the data ...
    • Applying the Crash Trifecta Approach to SHRP 2 Data 

      Dunn, Naomi; Hickman, Jeffrey; Soccolich, Susan; Hanowski, Richard (National Surface Transportation Safety Center for Excellence, 2018-04-06)
      The crash trifecta model does not consider crash genesis as a simple unitary element, but rather as a convergence of three separate, converging elements: (1) unsafe pre-incident behavior or maneuver; (2) transient driver ...
    • Assessing the Safety Impact of Roadway Improvements Using Naturalistic Driving Data--Feasibility Study 

      Li, Yingfeng; Medina, Alejandra; Gibbons, Ronald B. (National Surface Transportation Safety Center for Excellence, 2017-10-19)
      This project explored the feasibility of using Second Strategic Highway Research Program (SHRP 2) data, including the Roadway Information Database (RID), to evaluate the effectiveness of roadway safety improvements where ...
    • An Assessment of Quiet Vehicles and Pedestrian and Bicyclist Safety 

      Alden, Andrew S. (2014-07-28)
      The primary intent of this report is to provide a comprehensive and concise overview of the apparent safety issues presented to pedestrians and pedalcyclists by the operation of quiet vehicles on roadways. The report ...
    • Assessment of the impact of color contrast in the detection and recognition of objects in a road environment : final report 

      Terry, Travis; Gibbons, Ronald B. (Ronald Bruce) (Virginia Tech. Virginia Tech Transportation Institute, 2011-12-16)
      With the development of new light sources, options for the color and spectral output of a luminaire are wider than for traditional light sources. This can impact visibility as the spectral output of a light source may have ...
    • Case Study on the Impact of Treating Sleep Apnea in Commercial Motor Vehicle Drivers: Sleep Apnea Programs from Two Leading U.S. Carriers and Focus Group Findings 

      Mabry, J. Erin; Baker, Stephanie Ann; Hickman, Jeffrey S.; Hanowski, Richard J. (Virginia Tech. Virginia Tech Transportation Institute, 2012-09-28)
      Approximately one in four commercial motor vehicle (CMV) drivers in the U.S. are estimated to possess mild or higher levels of obstructive sleep apnea (OSA), the most common sleep-breathing disorder that is associated with ...
    • Case Study on Worksite Health and Wellness Program for Commercial Motor Vehicle Drivers 

      Mabry, J. Erin; Hickman, Jeffrey S.; Hanowski, Richard J. (Virginia Tech. Virginia Tech Transportation Institute, 2013-10)
      Due to the elevated prevalence of overweight and obesity in the transportation industry and the risks that accompany obesity, a health and wellness (H&W) program at a leading trucking organization was initiated to reduce ...
    • CMV Driver Health Outreach 

      Trimble, Tammy E.; Morgan, Justin F.; Hanowski, Richard J.; Blanco, Myra (Virginia Tech. Virginia Tech Transportation Institute, 2013-10)
      Many commercial motor vehicle (CMV) drivers struggle to maintain a healthy lifestyle against the demands of their job. While some previous CMV health programs have been developed, these programs have either not been widely ...
    • Color Camera 

      Meyer, Jason E.; Gibbons, Ronald B.; Connell, Caroline A. (National Surface Transportation Safety Center for Excellence (NSTSCE), 2017-02-28)
      Under the sponsorship of the National Surface Transportation Safety Center for Excellence (NSTSCE), a research team at the Virginia Tech Transportation Institute (VTTI) developed a color camera system that can collect ...
    • Commercial Motor Vehicle Driving Safety Website 

      Tidwell, Scott; Trimble, Tammy; Blanco, Myra (National Surface Transportation Safety Center for Excellence, 2016-08-06)
      This report documents the CMV Driving Safety website (http://cmvdrivingsafety.org/), which was created by the National Surface Transportation Safety Center for Excellence (NSTSCE) as an outreach effort to assist commercial ...
    • Commercial motor vehicle health and fatigue study : final report 

      Wiegand, Douglas M.; Hanowski, Richard J.; McDonald, Shelby E. (Virginia Tech. Virginia Tech Transportation Institute, 2009-02-11)
      Fatigue is a major risk factor in commercial motor vehicle operations, identified in naturalistic driving studies as a contributing factor in approximately 20 percent of safety-critical incidents. Understanding the nature ...
    • Common Data Elements between the Large Truck Crash Causation Study Investigations and Commercially Available Onboard Monitoring Systems 

      Marburg, T. Laurel; Hickman, Jeffrey S.; Hanowski, Richard J. (2015-01-28)
      At the heart of traffic safety is the identification of factors that lead to crashes. With this knowledge, interventions can be developed to mitigate or prevent these factors from occurring in the future. Post hoc ...
    • Comparing Three Methods of Eye-Glance Transition Coding 

      McClafferty, Julie A.; Hankey, Jonathan M. (National Surface Transportation Safety Center for Excellence, 2016-09-30)
      In order for researchers to analyze driver glance behavior and compare their results to other studies, glance evaluation methodologies must be comparable in terms of how specific terms are defined. To this end, the ...
    • Crash Trifecta: A Complex Driving Scenario Describing Crash Causation 

      Dunn, Naomi J.; Hickman, Jeffrey S.; Hanowski, Richard J. (2014-07-28)
      When determining crash causation, crash databases emphasize a single, unitary critical reason (CR) as the primary proximal cause of a safety-critical event (SCE), which leaves no room for the specification of any other ...
    • Development and evaluation of a naturalistic observer rating of drowsiness protocol : final report 

      Wiegand, Douglas M.; McClafferty, Julie; McDonald, Shelby E.; Hanowski, Richard J. (Virginia Tech. Virginia Tech Transportation Institute, 2009-02-25)
      VTTI researchers have developed a method for rating driver drowsiness based on the evaluation of naturalistic video footage of the driver's face and upper torso. This measure, referred to as the Observer Rating of Drowsiness ...
    • Development and validation of a luminance camera : final report 

      Meyer, Jason E.; Gibbons, Ronald B. (Ronald Bruce); Edwards, Christopher J. (Virginia Tech. Virginia Tech Transportation Institute, 2009-02-11)
      Under the sponsorship of the National Surface Transportation Safety Center for Excellence (NSTSCE), an effort was undertaken to develop a system of image capture to analyze luminance data gathered in naturalistic driving research.
    • Development of a Mobile Measurement System for Roadway Lighting 

      Gibbons, Ronald B.; Meyer, Jason; Edwards, Christopher J. (National Surface Transportation Safety Center for Excellence, 2018-01-04)
      In recent years, the complexity of the evaluation metrics of roadway lighting has continually increased. In order to measure the effectiveness of a roadway lighting system in situ, a mobile measurement system has been ...
    • Development of a Protocol to Classify Drivers’ Emotional Conversation 

      Fitch, Greg; Russell, Sheldon M; McClafferty, Julie (2017-05-05)
      To facilitate future analyses of emotion in naturalistic driving study (NDS) data, a protocol was developed to rate the emotional content of video samples collected during NDS. The protocol required data reductionists to ...