Browsing by Author "Wiegand, Douglas M."
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- Commercial motor vehicle health and fatigue study: final reportWiegand, 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.
- Development and evaluation of a naturalistic observer rating of drowsiness protocol : final reportWiegand, 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.
- Development of a Performance Specification for Camera/Video Imaging Systems on Heavy VehiclesWierwille, Walter W.; Schaudt, William A.; Spaulding, Jeremy M.; Gupta, Santosh K.; Fitch, Gregory M.; Wiegand, Douglas M.; Hanowski, Richard J. (United States. National Highway Traffic Safety Administration, 2008-07)This document provides revised final performance specifications for Camera/Video Imaging Systems (C/VISs) used in heavy vehicles. The specifications are based on a combination of analyses including driver needs and human factors, current and future video technology, systems analyses, focus groups, preliminary tests, and formal on-road tests. In these specifications C/VISs are divided into two categories: surrogates, which take the place of the essential side mirrors, and enhancements, which are all other applications. The specifications are written in three parts: an introductory section defining terms and stating general requirements, a section providing detailed specifications for two surrogate configuration concepts and nine enhancement concepts, and a section providing additional common detailed specifications. The specifications are intended to serve as a culmination of best approaches and practices for development of viable C/VISs. It is expected that if the specifications are followed, they will result in feasible and reasonably uniform implementation, thereby making the heavy vehicle driver's task more efficient. For background information and research justification of the specifications, the reader is referred to the companion final report, Development of a Performance Specification for Camera/Video Imaging Systems on Heavy Vehicles, DOT HS 810 960 (Wierwille, Schaudt, Spaulding, Gupta, Fitch, Wiegand, & Hanowski, 2007).
- Fatigue analyses: from 16 months of naturalistic commercial motor vehicle driving dataWiegand, Douglas M.; Hanowski, Richard J.; Olson, Rebecca Lynn; Melvin, Whitney (National Surface Transportation Safety Center for Excellence, 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 to gain a greater understanding of the conditions which are associated with fatigue in commercial motor vehicle (CMV) driving.