What is the "four-second rule" in driving?

The four-second rule refers to a guideline that helps drivers maintain a safe following distance from the vehicle in front of them under normal driving conditions. This rule suggests that a driver should select a fixed point on the road, such as a sign or a tree, and start counting when the vehicle in front of them passes that point. If the driver reaches the fixed point before counting to four, it indicates that they are following too closely and need to increase their distance.

By adhering to this rule, drivers can provide themselves with enough reaction time in case the vehicle ahead suddenly slows down or stops. This distance allows for better visibility and braking time, reducing the likelihood of a rear-end collision. The four-second rule is particularly effective in ideal driving conditions, where visibility and road conditions are favorable.

While the other options touch on different driving concepts, they do not pertain to safe following distance in a straightforward manner. Speed limits relate to legal maximums or minimums on roads, stop times focus on intersection behavior, and lane change timings do not emphasize the importance of maintaining appropriate distances between vehicles. Thus, the correct focus on the four-second rule is on ensuring a safe buffer while driving, promoting overall road safety.