Multi-tasking is a myth. The human brain cannot actually perform two functions at the same time.
Instead, it switches from one task to other very quickly. Even though the change may only take milliseconds, it takes the brain time to come up to speed on the new task.
What does this have to do with driving? It’s simple. Trying to do more than one thing while behind the wheel of an automobile means you will perform neither very well. Even worse, it means that your reaction time in an emergency situation will be increased dramatically.
Every employer that has employees on the road should have a distracted-driving policy in place — and it should be understood and enforced.