To what does the term 2-second rule refer to?

The "2-second rule" refers to a guideline for maintaining a safe following distance while driving. It suggests that a driver should stay at least two seconds behind the vehicle in front of them, allowing enough time to react in case of sudden stops or emergencies. To measure this distance, a driver can pick a fixed point on the road and ensure their vehicle passes it at least two seconds after the vehicle ahead does. This rule helps promote safer driving practices and reduce the risk of collisions.