Safe Following Distance
- 1/20If you drive at 30 km/h
At low speeds, a truck still needs 18 meters to stop due to reaction and braking time.
If you maintain safe gap at 50 km/h
At 50 km/h, 40m distance helps prevent rear-end collisions.
When driving 60 km/h
Higher speed increases stopping distance; maintain more gap to react safely.
If you travel at 80 km/h
At 80 km/h, braking distance increases sharply; larger clearance is essential to avoid collisions.
You must keep proper distance when driving 100 km/h
At highway speeds, a truck needs 130m to stop safely; tailgating is extremely dangerous.
If your truck is at 120 km/h
At 120 km/h, trucks require 180m clearance; safe distance is critical to avoid fatal crashes.
When your reaction time is 1 second
Even 1 second delay increases travel distance; faster speeds require more buffer space.
You must know backlash distance increases with speed
Backlash distance is the ground covered before braking starts; higher speeds make it longer.
If braking starts late
Braking distance depends on speed, load, and road surface conditions.
You should remember doubling speed quadruples braking
At higher speeds, braking distance increases exponentially, not linearly.
If rain occurs at 80 km/h
Wet roads increase braking time; trucks should extend gap more than dry-surface stopping distance.
When driving 100 km/h
Trucks need long gaps to stop; maintaining 130m helps avoid high-speed collisions.
You must keep more distance in city driving at 50 km/h
Even at 50 km/h, sudden stops require about 40m to avoid crashes.
If the truck is fully loaded
Extra weight increases stopping distance beyond chart values; gaps must be extended further.
You should know empty trucks still need space
Even without load, stopping distance remains long due to truck size and brake delay.
When driver is fatigued
Tired drivers have slower reactions, increasing reaction distance dangerously.
You must control speed in congestion
In traffic, reducing speed shortens stopping distance, improving safety.
If driving downhill
Gravity increases braking distance on slopes; larger gap prevents runaway accidents.
You must avoid tailgating
Tailgating removes necessary stopping space, making collisions unavoidable in sudden stops.
When visibility is poor
In fog or darkness, increase distance beyond chart to allow for reduced reaction time.