Why is the road blocked when it rains and snows?

Isn't that simple? Because of this rainy and snowy weather, cars will travel relatively slowly and break down more easily, so as long as a car breaks down on one road, the roads behind it will be blocked.

Therefore, travel as little as possible in rainy and snowy days. No matter in expressway or on the ground, rainy and snowy days are the most frequent periods of accidents, and traffic jams are inevitable.