Longman Dictionary of Contemporary English
stopping distance
noun
EXAMPLES FROM CORPUS
▪ Radar or vision-based sensors in the front of your car will keep it a safe stopping distance from the car ahead.
Wiktionary
stopping distance
n. The distance that is the sum of the thinking distance and the braking distance.
Usage examples of "stopping distance".
I was going fifty miles an hour, which on gravel leaves you with a stopping distance of about three miles.