The minimum safe following distance in traffic is…?
- A two second gap to the other vehicle ✓
- A one second gap to the other vehicle
- Seven car lengths behind the other vehicle
- Five car lengths to the other vehicle
Answer: A. A two second gap to the other vehicle
The minimum safe following distance is a two-second gap to the vehicle ahead.
Why this is the answer
The handbook sets the basic following distance as at least two seconds of space behind the vehicle ahead in good weather and road conditions. It then says to add more time: three seconds on high-speed roads and four seconds in bad weather or on uneven or slippery roads. So the minimum safe gap in ordinary conditions is the two-second gap, not a shorter one and not a fixed number of car lengths.
Why the other answers are wrong
- B. A one second gap to the other vehicle — A one-second gap is shorter than the handbook's minimum of at least two seconds in good conditions.
- C. Seven car lengths behind the other vehicle — Seven car lengths is not the handbook's measure; it describes following distance as a time gap, with two seconds as the minimum.
- D. Five car lengths to the other vehicle — Five car lengths is not the handbook's measure; it describes following distance as a time gap, with two seconds as the minimum.
Remember it
Treat two seconds as your baseline and add seconds for higher speed, bad weather, slippery roads, or blocked vision.
Official handbook: ICBC Learn to Drive Smart, Chapter 5: see-think-do – Do, p. 73