How many seconds should you ideally stay behind a vehicle when driving at high speeds (50-70+ mph)?

When driving at high speeds, maintaining a safe following distance is essential for ensuring adequate reaction time and minimizing the risk of collisions. The recommended following distance at speeds of 50-70+ mph is typically four seconds. This time frame allows drivers to react appropriately to sudden stops or emergencies.

At higher speeds, the distance covered in a short amount of time increases significantly, which is why a longer following distance is necessary. A four-second gap provides a buffer that gives drivers the time to process potential hazards ahead and respond accordingly. This method is consistent with the "three-second rule" used at lower speeds, but it is extended to four seconds to accommodate the higher speeds and greater stopping distances required on the roadway.

This principle of a four-second following distance aligns with best practices for defensive driving, promoting safer driving conditions for oneself and others on the road.