On wet pavement at 60 mph, how much following distance should a 70-foot unit maintain?

Answer: B — 10 seconds

The recommended following distance on wet pavement at a higher speed, such as 60 mph, is crucial for maintaining safety and control. In this particular scenario, a following distance of 10 seconds is appropriate because it provides ample time for the driver to react to any changes or hazards in front of them. Wet pavement can significantly increase stopping distances due to reduced traction. At higher speeds, the amount of time needed to come to a complete stop also increases, making it essential to maintain a greater distance from the vehicle ahead. A 10-second following distance allows the driver to account for the longer stopping distance required on slippery surfaces and affords more time to handle unexpected situations, such as a sudden stop or an obstacle. This level of following distance is particularly important for larger vehicles, like a 70-foot unit, which typically require more space to maneuver and stop safely. It provides a buffer that enhances the driver's ability to respond effectively to changing conditions and helps prevent collisions. Thus, 10 seconds serves as a standard guideline in defensive driving practices under adverse weather conditions, emphasizing the importance of patience and caution.