What is the proper following distance for a commercial vehicle?

The proper following distance for a commercial vehicle is determined by speed and vehicle length. The guideline of at least one second for every 10 feet of vehicle length is particularly significant for larger vehicles, which require more space to stop safely. For speeds under 40 mph, this formula provides a reliable way to ensure that a commercial driver has adequate reaction time and stopping distance. This is essential because commercial vehicles tend to be heavier and require more time to slow down compared to smaller vehicles.

As vehicles travel faster, they should increase their following distance. Therefore, if a commercial vehicle is 30 feet long, for example, the driver should maintain a following distance of at least three seconds at lower speeds. This strategy helps to prevent collisions and ensure safer driving conditions, especially in the event of sudden stops or changes in traffic flow. Understanding the relationship between speed, vehicle size, and following distance is crucial for the safe operation of commercial vehicles on the road.