When is it illegal to use a cell phone while driving?

The correct answer highlights that it is illegal for drivers under the age of 18 to use a cell phone while driving in Ohio. This law is implemented to enhance safety for younger, less experienced drivers who may be more easily distracted. The objective is to reduce the risks associated with distracted driving, which is a significant factor in traffic accidents.

Younger drivers often lack the experience needed to manage multitasking effectively while driving, and the use of cell phones can heavily divert their attention from the road. Thus, this legal restriction aims to promote safer driving habits among teens and reduce potential hazards on the road.

In contrast, the other options do not accurately reflect the law's stipulations regarding cell phone usage while driving. For instance, being on the highway or stopped at a red light does not exempt drivers from the laws governing cell phone use. Thus, it isn't just a matter of location or situation; the restrictions are specifically oriented toward the age of the driver in this instance.