What does the two-second rule help determine?

• A. A method for stopping at crosswalks
• B. A safe following distance on dry pavement; increase in poor conditions
• C. A way to time traffic signals
• D. A measurement for lane width

Answer: (B)

The two-second rule is a guide for keeping a safe following distance behind the vehicle in front. It gives you enough time to react and brake if that car slows or stops. On dry pavement, about two seconds between your vehicle and the one ahead is typically safe; in poor conditions—rain, snow, ice, or low visibility—you should increase that gap because stopping distances grow. This rule isn’t about stopping at crosswalks, timing traffic signals, or measuring lane width. A practical way to use it is to pick a fixed object on the road, note when the lead vehicle passes it, and ensure you pass the same object at least two seconds later.