In the picture, the blue car is following the red car. At a minimum, how much space should the blue car keep?
Correct answer: One car length per 10 mph, or a 3-second gap.
Answer options
AOne car length per 20 mph, or a 1.5-second gap
BOne car length per 10 mph, or a 3-second gap Correct
COne car length per 30 mph, or a 1-second gap
Why
The guideline is one car length for each 10 mph of speed, or a time gap of 3 seconds: when the red car passes a fixed object such as a sign, the blue car should not reach it before you can count to three. Gaps of 1 or 1.5 seconds leave too little time to react, and bad weather calls for even more room.