What is the reason for the high-speed traffic jam?

The reasons for high-speed traffic jams are: 1, foggy days and snowy days occur one after another, which is difficult to deal with, and the vehicles behind can only block in; 2. Sometimes car accidents will happen due to improper human operation. At this time, it will involve whether there are wounded or car insurance treatment problems; 3. Provincial toll stations are prone to traffic jams. Similarly, due to bad weather or road conditions, the road administration and traffic police departments will also implement measures such as closing the main line, diverting and releasing at intervals. When shunting, most trucks are reluctant to get off the expressway, because the road below will face too many vehicle inspections and fines, so it will be blocked for a long time.