Under normal conditions, what is a safe following distance behind the vehicle ahead?

• A. One second
• B. Three seconds
• C. Two seconds
• D. Four seconds

Answer: (B)

Maintaining a safe following distance means leaving enough time between your vehicle and the one ahead to perceive, react, and stop if they brake suddenly. Under normal conditions, the three-second rule gives a reliable buffer. To apply it, pick a fixed object on the road; as the vehicle ahead passes it, start counting seconds. If you reach the object after three seconds, you’re at a safe distance; if you reach it sooner, back off a bit. This timing corresponds to about 264 feet at highway speeds (roughly 60 mph) and less at slower speeds, giving you real, speed-adjusted space.

Two seconds is typically too close for comfortable stopping at higher speeds, and four seconds is more conservative, used in poor weather, heavy traffic, or when following a large vehicle.