In the picture, a blue car is traveling behind a red car. At a minimum, how much space should the blue car's driver keep?
Correct answer: A 3-second gap, or one car length per 10 mph.
Answer options
AA 3-second gap, or one car length per 10 mph Correct
BA 1.5-second gap, or one car length per 20 mph
CA 1-second gap, or one car length per 30 mph
Why
To check the gap, note when the red car passes a fixed marker such as a pole, then count: the blue car should take at least three seconds to reach it. The older guideline of one car length for each 10 mph is often quoted alongside this rule, and the gap should be larger in rain, fog or darkness.
