Browse Standards J3198
WIP 2012-01-17

Driver Drowsiness and Fatigue in the Safe Operation of Vehicles – Definition of Terms and Concepts J3198

This Information Report provides definitions and discussions of key terms concerning driver drowsiness and fatigue, and basic information on measuring drowsiness and fatigue. It also includes information and concepts for driver drowsiness as they relate to safe operation of a vehicle. Examples of driver drowsiness and fatigue causal factors include those related to the following: (1) sleep quality and quantity, (2) time of day, (3) time on task (related to the task of driving), (4) task-related fatigue (arousal levels related to task underload and overload), and (5) combinations of these factors. Medical conditions, medication, alcohol or drugs exacerbate drowsiness; however, the discussion in this report is limited to fatigue concepts. The Information Report has two primary sections: Section I provides definitions and discussions of key terms concerning driver drowsiness and fatigue; Section II provides basic information on measuring drowsiness and fatigue. This Information Report focuses on effects on the safe operation of a vehicle. These include the physiological and cognitive effects of driver drowsiness and fatigue on driving safety. Examples of effect of driver drowsiness and fatigue on driving safety include those related to vehicle control, vigilance, reaction times (object and event detection and response), situational awareness, physiological indicators, subjective assessments, and combinations thereof. For definitions of driving performance measures, see SAE J2944. This report applies to all worldwide motor vehicle passenger cars and light trucks; however, it can apply to heavy trucks, buses, motorcycles, and mopeds. The intended users of the document are practitioners and researchers in the automotive industry, academia, and other organizations with interest in driver drowsiness and fatigue, driving and driver performance assessment, and road safety.
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