Although driving might seem easy and natural, it’s actually a complex, fast-paced activity. It involves sensing information about traffic, road conditions, signals, markings, and the car’s behavior; deciding what to do based on that information, and then acting ― all in rapid-fire succession. A typical driver makes 20 decisions per mile, with less than half a second to act to avoid an accident.

Age affects all three steps in the process:

sensing, deciding, and acting.