Comment by Melatonic

One of the first things to go with Alzheimer's is spacial mapping in the brain so this makes sense. Your exercising daily a part of the brain that is involved.

In addition there's the social component of driving - you may not always want to talk to a Taxi driver but many people do. And ambulance drivers are often socializing with their colleagues

Driving also has a mix of reaction time based skills and hand eye and hand foot coordination. Overall it's pretty complicated.

Writing this I'm realising the final "Turing" test for AI might actually be just replacing the average Taxi driver. Can it drive a car, choose a route dynamically based on day and traffic and weather, and have a conversation with a wide variety of people and topics all at the same time ?