In the picture, the blue car is traveling behind the red car. What minimum spacing should its driver keep?
Correct answer: A gap of at least 3 seconds.
Answer options
AA gap of half a second
BA gap of 1 second
CA gap of at least 3 seconds Correct
Why
The three-second rule is the minimum safe following distance: when the red car passes a fixed object, the blue car should take at least 3 seconds to reach it. Anything shorter leaves too little time to react if the red car brakes, and high speeds or bad weather call for even more room.