Below is a link found to the NHTSA website, specifically to a page that has a ton of information about and for older drivers. On it you can access a fact sheet, driver fitness guidelines, articles for seniors about driving with various chronic illnesses, research, other resources and reports, and so much more!
And the best part is that the information is all FREE!
http://www.nhtsa.dot.gov/portal/site/nhtsa/menuitem.31176b9b03647a189ca8e410dba046a0/
