When traveling at highway speeds, what is the recommended following distance to allow enough room for an emergency stop?

The recommended following distance when traveling at highway speeds is 4 seconds or more to ensure there is enough room for an emergency stop. This distance takes into account not only the speed of the vehicle but also the time it may take for the driver to perceive a hazard and react appropriately. At higher speeds, the distance covered in a second is significantly greater, meaning that a longer following distance is critical for safety.

The 4-second rule provides a buffer that helps account for variables such as weather conditions, road surface, and the braking ability of the vehicle. In adverse conditions like rain or snow, this distance should be increased even further to maintain safe stopping distances. A 4-second gap allows for a safer reaction time and can prevent collisions by providing enough space to stop without needing to slam on the brakes. This practice aligns with safe driving guidelines and promotes responsible behavior on the road, especially at higher speeds where stopping distances can be long.