stopping distance
From Longman Dictionary of Contemporary EnglishRelated topics: Transportstopping distanceˈstopping ˌdistance noun [countable, uncountable] TTthe distance that a driver is supposed to leave between their car and the one in front in order to be able to stop safelyExamples from the Corpusstopping distance• Radar or vision-based sensors in the front of your car will keep it a safe stopping distance from the car ahead.