Browsing by Author "McDonald, Shelby E."

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    Commercial motor vehicle health and fatigue study: final report
    Wiegand, Douglas M.; Hanowski, Richard J.; McDonald, Shelby E. (National Surface Transportation Safety Center for Excellence, 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 of fatigued driving requires attention to several elements of the driving situation, including driver characteristics. The purpose of the present report is to explore driver body mass index (BMI) as a characteristic which may put one at increased risk for driving while fatigued.
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    Development and evaluation of a naturalistic observer rating of drowsiness protocol : final report
    Wiegand, Douglas M.; McClafferty, Julie A.; McDonald, Shelby E.; Hanowski, Richard J. (National Surface Transportation Safety Center for Excellence, 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 (ORD) is based on subjective assessments of the driver's facial tone, behavior, and mannerisms, and is set to a 100-point continuous scale. ORD is assessed based on the 60 seconds of video prior to a trigger event (or baseline epoch). Therefore, ORD is a relatively quick/efficient method for assessing one's drowsiness level, which can then be used to describe a driver's state and investigate whether drowsiness was a contributing factor to a safety-critical event.