The picture shows a blue car behind a red car. What is the least following distance the blue car should allow?
Correct answer: At least 3 seconds of travel.
Answer options
AAbout 1 second of travel
BAt least 3 seconds of travel Correct
CAbout 1.5 seconds of travel
Why
Pick a landmark the red car passes and count: the blue car should take at least three seconds to reach it. A gap of one or one and a half seconds is too short to stop in time, and the space should grow in rain, fog or heavy traffic.