To be faiir, while I don't use Google map to navigate it can be a useful tool in initial route planning. Fine tuning with street view, asking questions on this forum and of local cyclists while on the fly and a bit of luck have helped but Google map can be a good place to start. I live in the San Francisco Bay Area and sure, I know my local routes better than Google (who doesn't?) but it can get you a rough idea of an unknown route. Of course any prudent traveller will confirm this route with other resources however. Trust but verify.
Thanks again for the routing advice. I will avoid Kentucky 31W and Dixie Hiway.