What is the recommended following distance when driving a tractor-trailer?

The recommended following distance for driving a tractor-trailer is crucial for safety, as it allows the driver adequate time to react to sudden stops or emergencies. A following distance of 4 to 5 seconds is recommended because it accounts for the longer stopping distances required by larger vehicles like tractor-trailers, which are much heavier than standard passenger vehicles. The increased weight means that these trucks take longer to slow down or stop, and having enough space not only gives time for reaction but also prevents rear-end collisions.

This following distance also provides a cushion that can help accommodate changes in speed of the vehicle in front, road conditions, and visibility. Additionally, in adverse weather conditions, maintaining this longer distance is even more critical to ensure safety. Thus, adhering to a 4-5 second following distance is essential for the safe operation of tractor-trailers on the road.