For a 30-foot truck on dry roads, what is the recommended following time interval?

The recommended following time interval for a larger vehicle, such as a 30-foot truck on dry roads, is generally established based on safe driving practices that take into account the increased stopping distances required for larger and heavier vehicles. A following time of 3 seconds may seem like a suitable choice for smaller vehicles, but for larger trucks, this interval can be misleading.

In practice, a longer following distance is advisable due to factors such as the truck's weight, its longer braking distance, and its reduced maneuverability compared to smaller vehicles. A 4-second or greater following time is often recommended to ensure that the driver has enough time to react to sudden stops or changes in traffic conditions, thus reducing the risk of collisions.

For a 30-foot truck on dry roads, a following distance of 4 seconds allows for more ample reaction time, accounting for factors like the vehicle's weight and its braking capabilities. This interval helps maintain a safe space between the truck and the vehicle in front, adhering to safe driving protocols and creating a more defensive driving approach.