How long will expressway be closed in rainy and snowy weather?

The time of high-speed road closure in rainy and snowy weather depends on the size of rain and snow, road conditions and traffic conditions. Due to the rainy and snowy weather, roads in expressway are generally open for about 4 hours, and sometimes closed for several days in bad weather.

Common control measures for road closure due to snow are divided into the following three types:

1, the whole line is closed: when the visibility of the whole road section is less than 50 meters due to rain, snow and fog; All roads are frozen and covered with snow, which seriously affects the safe passage of vehicles;

2. Partial closure: when the visibility of some sections is below 50 meters due to rain, snow and fog; Some sections are frozen, foggy and covered with snow, which seriously affects the safe passage of vehicles;

3. Speed limit and intermittent release: when the visibility of the whole line or part of the road is more than 50 meters and less than 500 meters due to rain, snow and fog; When the whole line or part of the road is slightly frozen; When there is a large area of water accumulation on the rainy road surface in some sections, the speed limit should be reasonably controlled according to the situation, which can be implemented separately or simultaneously with intermittent release, but speed limit measures must be taken when intermittent release is implemented.