What is the safe follow-up distance on expressway?

There is no absolute standard for safe distance, only dynamic standard. The most direct and important factor affecting the safe distance is the speed. When the vehicle speed becomes faster, the required braking force, braking distance and the distance that the vehicle travels at the original speed in the reaction time all increase accordingly. Keeping a safe distance requires speed control.

Reference speed

Driving at high speed, that is, when the vehicle speed is above 100km/h, the safety distance is above 100 m.

Fast driving, that is, when the vehicle speed is above 60km/h, the safe distance is numerically equal to the vehicle speed; For example, the speed is 80km/h and the safe distance is 80 meters.

Driving at medium speed, that is, when the vehicle speed is about 50km/h, the safe distance is not less than 50 meters.

When driving at a low speed, that is, when the vehicle speed is below 40km/h, the distance between vehicles shall not be less than 30 meters.

Turtle speed, that is, when the vehicle speed is below 20km/h, the distance between vehicles shall not be less than 10m.

Extended data:

Measures and methods to control the distance between vehicles

1, control speed

I feel that the safety distance is too small, so slowing down is the best way.

Step 2 change lanes and overtake

During driving, due to the sudden braking and deceleration of the preceding vehicle, the safety distance is insufficient, so it is necessary to change lanes or overtake under the condition of ensuring safety.

Step 3 avoid traffic

Try to avoid rush hours or busy traffic sections, which is conducive to maintaining a safe distance on the road.

4. Reference signs

Expressway has a distance confirmation sign at intervals, which can easily and clearly judge whether you have kept a safe distance.

References:

Safe distance-Baidu Encyclopedia