JJ Keller Entry Level Driver Training CDL Practice Test 2025 – Comprehensive All-in-One Guide to Exam Success!

When driving a 70-foot rig at 65 mph, it is crucial to maintain a safe following distance to ensure adequate reaction time to any sudden actions from the vehicle ahead. The recommended following distance is typically calculated based on both speed and the length of the vehicle.

In this scenario, a larger following distance is necessary for a vehicle like a 70-foot truck due to its size and weight. A distance of eight seconds would allow the driver enough time to react and stop safely if the vehicle in front needs to brake or if an unexpected event occurs. This level of spacing provides a buffer that accounts for the increased stopping distance required by larger vehicles compared to standard cars.

The calculation of a following distance includes considering the time it would take to notice the situation, decide on an action, and then execute that action. Therefore, eight seconds is a cautious and safe choice that takes into account the unique challenges and characteristics of operating a large truck, especially in varying driving conditions.