What is the purpose of the three-second rule?

Answer: B — To ensure proper following distance

The purpose of the three-second rule is to ensure proper following distance between your vehicle and the one in front of you. This guideline helps maintain a safe distance to allow for adequate reaction time in case the vehicle ahead suddenly stops or slows down. By counting three seconds from the moment the car ahead passes a fixed point (like a sign or a tree), you can gauge whether you are following too closely. If you reach the same point before you count to three, it indicates that you may need to increase your following distance. This practice is essential for preventing rear-end collisions, especially in situations where traffic conditions can change rapidly. It encourages drivers to be more aware of their speed and the space needed to stop safely, contributing to overall road safety.