本SAE信息报告提供了有关驾驶员睡意和疲劳的关键术语的定义和讨论，以及测量睡意和疲劳的基本信息。它还包括与车辆安全运行相关的驾驶员睡意信息和概念。导致驾驶员瞌睡和疲劳的主要因素包括:（1）睡眠质量和数量，（2）一天中的时间，（3）清醒时间，（4）任务时间（由驾驶任务的特征调节），（5）任务相关疲劳（与任务欠负荷和超负荷相关的觉醒水平变化），以及（6）这些因素的组合。医疗条件、药物、酒精或药物会加剧嗜睡；然而，本报告中的讨论仅限于疲劳概念。本报告有两个主要产出:（1）关于驾驶员睡意和疲劳的关键术语的定义和讨论，以及（2）关于测量睡意和疲劳及其对车辆安全运行影响的基本信息。 其中包括驾驶员睡意和疲劳对驾驶安全的生理和认知影响。驾驶员睡意和疲劳对驾驶安全影响的示例包括与车辆控制、操作员警惕性（持续注意力）、反应时间（物体和事件检测和响应）、情景意识、生理指标、主观评估以及它们的组合有关的示例。有关驾驶性能测量的定义，请参阅SAE J2944。本报告适用于全球所有机动车辆乘用车和轻型卡车，以及重型卡车、公共汽车、摩托车和轻便摩托车。本文件的预期用户是汽车行业、学术界和其他组织的从业人员和研究人员，他们对驾驶员的嗜睡和疲劳、驾驶和驾驶员性能评估以及道路安全感兴趣。

This SAE 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 the safe operation of a vehicle. The key driver drowsiness and fatigue causal factors include the following: (1) sleep quality and quantity, (2) time of day, (3) time awake, (4) time on task (modulated by characteristics of the driving task), (5) task-related fatigue (variations of arousal levels related to task underload and overload), and (6) combinations of these factors. Medical conditions, medication, alcohol, or drugs exacerbate drowsiness; however, the discussion in this report is limited to fatigue concepts.This report has two primary outputs: (1) definitions and discussions of key terms concerning driver drowsiness and fatigue, and (2) basic information on measuring drowsiness and fatigue and its 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, operator vigilance (sustained attention), reaction times (object and event detection and response), situational awareness, physiological indicators, subjective assessments, and combinations thereof. For definitions of driving performance measures, refer to SAE J2944. This report applies to all worldwide motor vehicle passenger cars and light trucks, as well as 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.