人的视力有静视力和动视力之分。车辆运动时驾驶员与周围环境的物体相对运动,眼睛分辨物体的最短距离增大。就是说车速由低升高,驾驶员的注意点逐渐削弱,原本扇形的视野变为隧道形视野,即驾驶员眼睛所能看到的范围缩小了。同时,超速行驶时在一定时间内遇到的情况相对增多,而对每一情况的观察时间相对缩短,无疑此时观察 Human vision has static visual acuity and visual acuity points. When the vehicle is in motion, the relative movement of the driver and the surrounding environment objects, the shortest distance between the eyes to distinguish the object increases. That is to say the speed from low to high, the driver’s attention gradually weakened, the fan-shaped field of vision into a tunnel-shaped field of vision, that is, the driver can see the scope of the eyes narrowed. At the same time, the speeding encountered in a certain period of time the relative increase in the situation, while the observation time for each situation is relatively shortened, no doubt observed at this time