What is described by the “2-second rule” in following distance?

The “2-second rule” is a guideline designed to help drivers maintain a safe following distance when driving. By keeping at least 2 seconds of following distance behind the vehicle in front, drivers can ensure they have enough space to react to sudden stops or emergencies. This distance provides a buffer that accounts for various factors such as road conditions, traffic, and the driver's own reactions.

To apply the rule, a driver can select a stationary object on the side of the road as a reference point. When the vehicle in front of them passes that object, the driver should count "one thousand one, one thousand two" before their own vehicle reaches the same point. If the driver reaches the object before finishing the count, they are following too closely and should increase their following distance.

This practice enhances safety by providing enough reaction time, reducing the risk of rear-end collisions, especially in dynamic driving conditions.