According to the SAFER system, how much space should you maintain for every 3 meters of vehicle length?

The correct principle from the SAFER system indicates that for every 3 meters of vehicle length, you should maintain 1 second of following distance under ideal driving conditions. This rule is designed to ensure that drivers have ample space to react to any sudden stops or emergencies that may arise from the vehicle in front of them.

This following distance allows drivers to maintain control and reduces the risk of collisions by giving enough time to respond appropriately. It is particularly important in maintaining safety and promoting defensive driving habits.

In contrast, other choices represent following distances that would be too long for an average-sized vehicle, which could create unnecessary gaps in traffic and potentially disrupt the flow on the road. Drivers should always consider weather conditions, vehicle loads, and overall traffic scenario, as these factors could require a greater following distance than the standard 1 second per 3 meters suggested by the SAFER system in more challenging situations.