What is the purpose of the two-second rule?

The correct answer is: If the vehicle in front stops, the following vehicle should have enough time to brake.

The purpose of the two-second rule is to ensure that in the event of a sudden stop by the vehicle in front, the following vehicle has enough time and space to safely slow down and stop to avoid a collision. This rule is particularly important as it takes into account the necessary reaction time and braking distance of vehicles in motion. According to the two-second rule, drivers should choose a fixed object, such as a road sign or other marker, and start timing when the vehicle in front passes that fixed object, ensuring that their vehicle takes at least two seconds to reach the same fixed object. This helps maintain a safe following distance.