What is the safe driving distance for a car?

[Opal]

The safe driving distance for a car varies depending on the speed: 1. When the speed is above 100 km/h, the safe distance should be more than 100 meters; 2. When the speed is above 60 km/h, the safe distance should be numerically equal to the speed, for example, at 60 km/h, the safe distance should be more than 60 meters; 3. At a speed of 50 km/h, the safe distance should be more than 50 meters; 4. At a speed below 40 km/h, the safe distance should be more than 30 meters; 5. At a speed below 20 km/h, the safe distance should be more than 10 meters. The safe distance is the necessary gap that a following vehicle maintains to avoid accidental collision with the vehicle ahead while driving.