Why was there a traffic jam in expressway for several hours?

High-speed traffic jams for a long time are mainly due to the following reasons:

1. Various traffic accidents caused by illegal acts, accidents, weather, natural disasters and other reasons, especially serious traffic accidents of large or heavy vehicles, cause the accident vehicles to occupy a large area or the whole road surface in expressway, and the vehicles behind them cannot pass, resulting in traffic jams.

Ice, snow and foggy days have great influence on traffic. Snow and ice weather can easily lead to snow and ice on the road surface in expressway, and vehicles are prone to skid, which makes it impossible to pass safely.

3. There are too many vehicles in the toll station, and the release is slow and untimely, resulting in a backlog of vehicles and even serious traffic jams. This phenomenon mostly occurs during holidays and free passage.

Precautions for high-speed traffic jams:

1, you can choose to get off at the nearest expressway intersection to prevent traffic jams in expressway.

2. You can choose to notify the corresponding traffic management department to deal with traffic jams.

3, should slow down, to prevent rear-end behavior.