Not sure when the program began, it says Virginia was first. The link opens with one of those kinda cheesy overview videos, but many interesting topics to tap about senior driving safety.

http://www.granddriver.net/vid...abid/86/default.aspx

Also found that VA has a program called Medical Fitness for Safe Driving. A confidential report can be made to the DMV by a concerned party, and let the DMV look into it.
(Yeah, promises, promises).

http://dmvnow.com/webdoc/pdf/med80.pdf

Interesting read though, maybe help is on the way.