Traffic Safety
Hastighet
Lätt
How is the car's braking distance affected if the speed increases from 50 km/h to 100 km/h on dry asphalt?
The braking distance becomes about four times longer
The braking distance doubles
The braking distance is not affected by speed
Explanation
The braking distance increases quadratically with speed. Doubling the speed (from 50 to 100) gives about four times longer braking distance.
Source: NTF
Last reviewed: May 2026
Want to practice more questions?
Train for free on the entire Traffic Safety
In-depth study
Recommended guide
Read guideHow to pass the theory test on your first try
Related questions
How long is approximately the reaction distance when you drive at 50 km/h with 1 second reaction time?
Hastighet
What reaction time is common for a rested and attentive driver?
Hastighet
Why is the speed limit often 30 km/h in built-up areas where there are pedestrians and cyclists?
Hastighet
What distance should you at least keep to the vehicle in front in good conditions?
Säkerhetsavstånd
When do you need to increase your safety distance more than normal?
Säkerhetsavstånd