What is the recommended following distance under ideal conditions?

• A. The three-second rule
• B. The two-second rule
• C. The four-second rule
• D. The one-second rule

Answer: (A)

Three seconds is a practical buffer that lets you notice the vehicle ahead, react, and brake in typical dry conditions. The idea is simple: pick a fixed object ahead and start counting seconds after the car in front passes it; if you reach the object before finishing three, you’re too close. This rule provides enough time to respond and stop safely at normal speeds without being overly cautious, and it scales with speed since you cover more ground in those three seconds as you go faster. In poorer weather or on slick roads, you should increase the gap to four seconds or more because stopping distances grow and reaction times can be longer. Shorter gaps, like one or two seconds, don’t leave enough space for a safe stop at typical driving speeds.