How long is the snowy highway usually closed?

The road closure time in snowy days is determined according to the size of rain and snow, road conditions and traffic conditions.

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; The whole road is covered with ice and 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; Ice, fog and snow in some sections have seriously affected 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. Under normal circumstances, if the snow stops in the morning, all the snow shoveling and deicing on the pavement will be smooth, and the control will be gradually lifted from 12 to 13. But because the snow melts during the day, black ice will form at night. After the highway was unsealed, it was controlled again that night and it was not fully restored until the next morning. So in general, the high-speed closing time is about 12 hour. However, if it is unsealed at a high speed between 10 am and 12 am, it will generally not be closed again. The specific time should be judged according to the road snow and visibility, and the road department will inform the traffic police department to decide whether it can be released.