I bought a cheapo GPS a few years ago when renting a car (they wanted $30/day for one so I bought one for a little over $100) and it has a feature to avoid freeways. I could maybe fire it up and see what route it would suggest. Or if someone familiar with TN weighs in, that would be good since I drove thru TN back in 1970. I bet things have changed a bit since then.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.