秋末冬初,大雾频发。高速公路车流量大,车速快,雾天发生的交通事故屡见不鲜。司机掌握一些雾天行车的安全常识非常必要。高速公路上,当能见度低于50米时,交管部门会关闭雾区的所有入口通道;已经驶入高速公路的车辆,要就近驶离高速公路或进入服务区。当能见度低于100米大于50米 Early autumn and winter early in the fog. Expressway traffic flow, fast speed, frequent occurrence of traffic accidents in the fog. It is necessary for drivers to have some safety tips in foggy driving. On the highway, when the visibility is below 50 meters, the traffic control department will close all entrances to the fog zone; vehicles that have entered the expressway should leave the expressway or enter the service area nearby. Visibility below 100 meters is greater than 50 meters