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在过于直的道路上高速行车,发动机的声调一成不变,司机开一阵车之后,会因缺乏感官刺激而逐渐产生精神疲劳,甚至昏昏欲睡,速度感和快速反应能力会随之减弱;另从视觉特性来说,如果司机的眼睛长时间地注视着无限远方,也会产生一种视差,把近处的东西看成是远方的东西。医学上称之为“空虚近视”。这些极容易发生交通事故。 鉴于上述原因,许多国家对高速公路的直线路段长度给予了限制。一般规定直线路段不得超过设计每小时行车时速的1/40至1/20。比如一条
Driving on an overly straight road at high speed, the tone of the engine is unchanging. Drivers who drive for a while will gradually develop mental fatigue due to lack of sensory stimulation, even drowsiness, thus reducing their sense of speed and responsiveness. On the other hand, For the visual character, if the driver’s eyes are watching infinity for an extended period of time, a parallax can also occur that sees things in the distance as something further away. Medically called “empty myopia.” These are extremely vulnerable to traffic accidents. In view of the above, many countries have imposed restrictions on the length of straight sections of expressways. As a general rule, the straight line section shall not exceed 1/40 to 1/20 of the designed hourly driving speed. For example, one