If the driver is not fully alert, what is the recommended increase in following distances?

When a driver is not fully alert, it is crucial to increase the following distance to ensure safety. Doubling the following distance allows for more reaction time to any changes in traffic, obstacles, or sudden stops by the vehicle in front. This extended distance provides a buffer zone, compensating for the driver's diminished alertness and potential slower response times.

Increasing the following distance to twice the normal distance accounts for the increased risks associated with decreased attention and reaction capabilities. It helps the driver maintain a safer space to react to events on the road, ultimately reducing the likelihood of collisions. This practice is particularly important in emergency response situations, where drivers often face distractions and must manage high-stress environments.