Question 3415
In a single-lane tunnel, what minimum safe following distance must you maintain from the vehicle ahead?
- 100 meters or 4 seconds.
- 50 meters or 2 seconds.
- 150 meters or 6 seconds.
Show answer and explanation
Correct answer: 100 meters or 4 seconds.
In a tunnel, if not passing, a vehicle with a maximum authorized mass (MMA) of up to 3,500 kg must maintain a following distance of at least 100 meters or a four-second gap.