What is the recommended following-distance rule in good driving conditions?

What is the recommended following-distance rule in good driving conditions?

• A. One-second rule
• B. Two-second rule
• C. Three-second rule behind the vehicle ahead
• D. Five-second rule

Answer: (C)

The key idea is using a time-based following distance to ensure you have enough time to notice a hazard, react, and brake. In good driving conditions, aim for about a three-second gap behind the vehicle in front. To judge it, pick a fixed object on the road ahead and start counting as the front vehicle passes it. If you reach the object before you’ve counted to three, you’re too close and should pull back a bit to create a three-second cushion. This three-second rule accounts for typical driver reaction time and braking distance at normal speeds. If conditions are less than ideal—wet or icy roads, low visibility, or if you’re driving a larger vehicle or a load—you should increase the gap to four seconds or more. The one-second and two-second options don’t give enough room for safe stopping under normal speeds, while a five-second rule is more conservative than necessary in good conditions, though it can be prudent in heavy traffic or poor weather.

The key idea is using a time-based following distance to ensure you have enough time to notice a hazard, react, and brake. In good driving conditions, aim for about a three-second gap behind the vehicle in front. To judge it, pick a fixed object on the road ahead and start counting as the front vehicle passes it. If you reach the object before you’ve counted to three, you’re too close and should pull back a bit to create a three-second cushion. This three-second rule accounts for typical driver reaction time and braking distance at normal speeds.

If conditions are less than ideal—wet or icy roads, low visibility, or if you’re driving a larger vehicle or a load—you should increase the gap to four seconds or more. The one-second and two-second options don’t give enough room for safe stopping under normal speeds, while a five-second rule is more conservative than necessary in good conditions, though it can be prudent in heavy traffic or poor weather.