What does the two-second rule refer to?

The two-second rule is a guideline used to ensure safe following distance between vehicles while driving. It suggests that a driver should maintain a distance from the car in front that allows for at least a two-second interval. This distance provides ample time for the driver to react to sudden stops or emergencies, allowing for adequate stopping time if needed. Essentially, by counting the seconds it takes from when the vehicle in front passes a fixed point until the driver’s own vehicle reaches the same point, a driver can gauge whether they are following far enough behind to ensure safety. This practice helps prevent rear-end collisions and enhances overall road safety.

The other options focus on aspects like checking blind spots or reacting to distractions, which are crucial for safe driving but do not directly relate to the specific concept of the two-second rule in terms of following distance.