Washington State Department of Licensing Knowledge Test

To avoid rear-end collisions at higher speeds, you must maintain what type of distance?

1. Two-second rule

2. Four-second rule

3. Three-second rule

4. Five-second rule

The correct answer is: Four-second rule

Maintaining a four-second following distance is critical when driving at higher speeds to avoid rear-end collisions. This distance allows for a better reaction time in case the vehicle in front suddenly stops or slows down, giving more time to react and safely control your vehicle. At higher speeds, the distance traveled in a second is significantly greater, making it essential to increase your following distance beyond what is generally recommended for lower speeds. A four-second gap provides ample time for perception, decision, and reaction, reducing the likelihood of a collision. The other choices, while they promote safe driving habits, do not account for the increased stopping distances and reaction times needed when driving at higher speeds. Thus, the four-second rule is the most effective choice for ensuring safety in such conditions.