Hit the Brakes!: When is it Time to Stop Driving?

Hit the Brakes!: When is it Time to Stop Driving?

Grandpa is turning 80 next month.  Does that mean we should take away his keys?  Would it be better to give him a couple more years and have him turn over his license at 85?  90?  When is the appropriate time for our loved ones to stop driving?  Believe it or not, age...