What is the "2-second rule" in driving?

The "2-second rule" is a guideline that helps drivers maintain a safe following distance from the vehicle in front of them. It is based on the idea that by keeping at least a two-second gap, a driver can react appropriately and stop safely if the leading vehicle suddenly brakes. This rule promotes safety by ensuring that drivers have enough time to respond to unexpected events.

To apply this rule, a driver should choose a fixed point on the roadway, such as a sign or a tree, and start counting seconds as the vehicle in front of them passes that point. If the driver reaches the same point before completing the count of two seconds, they are following too closely and should increase their distance. This technique is particularly important in adverse weather conditions or low visibility scenarios, where stopping distances can increase significantly.

The other options do not relate to the concept of maintaining a safe distance while driving. Using turn signals, parking techniques, and merging concepts focus on different aspects of driving and road safety.