What is the minimum following distance recommended?

What is the minimum following distance recommended?

• A. 2 seconds
• B. 4 seconds
• C. 6 seconds
• D. 8 seconds

Answer: (B)

The important idea here is using a time-based following distance to ensure you have enough time to react and stop if the vehicle in front slows suddenly. The minimum safe gap is four seconds because it gives you a reasonable perception–reaction time plus braking distance at typical driving speeds. With four seconds of travel between you and the car ahead, you’re more likely to avoid a rear-end collision if the lead vehicle brakes hard or an obstacle appears. Two seconds is generally too short for a safe stop in many conditions, while six or eight seconds are more conservative margins useful in poor weather, heavy traffic, or when towing or driving large vehicles. So, four seconds is considered the safe minimum in standard conditions.

The important idea here is using a time-based following distance to ensure you have enough time to react and stop if the vehicle in front slows suddenly. The minimum safe gap is four seconds because it gives you a reasonable perception–reaction time plus braking distance at typical driving speeds. With four seconds of travel between you and the car ahead, you’re more likely to avoid a rear-end collision if the lead vehicle brakes hard or an obstacle appears. Two seconds is generally too short for a safe stop in many conditions, while six or eight seconds are more conservative margins useful in poor weather, heavy traffic, or when towing or driving large vehicles. So, four seconds is considered the safe minimum in standard conditions.