Arizona Driving Permit Written Practice Test

What does the 3 - 6 second rule help determine?

1. Speed limits

2. Lane changing

3. Following distance

4. Intersection regulations

The correct answer is: Following distance

The 3 - 6 second rule is a critical guideline for drivers to assess their following distance to the vehicle in front of them. By counting the seconds it takes from the moment the vehicle ahead passes a fixed point, like a sign or tree, until you reach that same point, you can ensure you are maintaining a safe distance. This buffer is essential for allowing adequate reaction time in case the vehicle ahead suddenly stops or slows down. A following distance of 3 to 6 seconds can help prevent rear-end collisions and provides enough time to respond to changes in traffic or road conditions. The other options relate to different driving concepts; for instance, speed limits are regulated by law based on specific road conditions and areas. Lane changing requires awareness of other vehicles and blind spots but does not inherently involve a timing rule like the 3 - 6 second rule. Intersection regulations focus on rules like stop signs and traffic lights that govern how drivers should proceed at intersections, which again is distinct from the concept of following distance.