I really think old (or older or elderly or ancient) people need to be able to drive (as long as they are still physically capable to without causing harm to themselves or others).
I feel they should have their own roads for slow moving traffic, no sudden moves, and a comfort that can get them to and from their doctors appointments. I want them to be able to make their trip safe and sound and not give them a heart attack or have them get in my way.
So, lets pave Elderly Avenue, where the best of both worlds come together. A road you can only drive on if 25 mph is your ideal speed. Grandma Drive, Geezer Lane, Old Person Way, Back in the Day Boulevard, Gray Hair and Balding Parkway, Ancient Road. If you fit the profile, go for a spin and enjoy.