What is the minimum following distance behind a vehicle?

The minimum following distance behind a vehicle is typically recommended to be at least three seconds. This three-second rule is designed to provide drivers with enough time to react to sudden stops or emergencies that may occur in front of them. It allows for a safer distance, especially in varied driving conditions, such as rain, fog, or heavy traffic, where stopping distances can be significantly longer.

When calculating this distance, a driver can pick a stationary object on the road ahead, such as a sign or tree. As the vehicle in front passes that object, the driver should count "one thousand one, one thousand two, one thousand three." If they reach the marker before finishing the count, they are too close and should increase their following distance.

This three-second interval gives ample space for reaction time and enhances the safety of the following vehicle, reducing the risk of rear-end collisions. The other options suggest shorter following distances that may not provide enough time to react appropriately, making them less safe for drivers.