In the picture, a blue car travels behind a red one. At a minimum, how much space should the blue car's driver allow?
Correct answer: A gap of at least 3 seconds.
Answer options
AA gap of about 1 second
BA gap of about half a second
CA gap of at least 3 seconds Correct
Why
The basic minimum is 3 seconds of following time; an easy check is to count the seconds after the red car passes a fixed marker. Leave extra room in rain or fog, and remember that 1 second is dangerously close.