疲劳是人体经常出现的一种生理状态。正因为它“经常出现”,所以人们对它习以为常,不易引起注意。对于一般人来说,疲劳时除了自我感觉“难受”、“不适”之外,不会对工作产生太大的影响。然而,对于从事有一定危险性工作的车辆驾驶员来说,在身体处于疲劳状态下开车,会出现精神恍惚、反应迟钝、视觉不清、力气不足、手脚操车动作失准乃至错乱等 Fatigue is a physiological condition that often occurs in the body. Because of its “frequent appearance,” people are accustomed to it and are not easy to attract attention. For the average person, fatigue will not have much impact on the work except when he / she feels “uncomfortable” or “discomfort”. However, for a driver of a vehicle engaged in a certain dangerous work, he may experience trance, unresponsiveness, lack of energy, and uncomfortable hands and feet when he or she is driving under the condition of fatigue.