The picture shows one car following another. How much room should a driver leave behind the vehicle ahead?
Correct answer: A 3-second gap, or one car length for each 10 mph.
Answer options
AA 1.5-second gap, or one car length for each 20 mph
BA 1-second gap, or one car length for each 25 mph
CA 3-second gap, or one car length for each 10 mph Correct
Why
Stay at least 3 seconds, or roughly one car length per 10 mph, behind the vehicle you follow, and double that space when roads are slippery or visibility is poor. Shorter gaps leave too little time to stop if traffic ahead brakes hard.