Unless you want to go way out of the way or drive the back roads I 65 is your best bet. We actually just drove from Nashville to Indianapolis today and it wasn't too bad. We pulled the 5er from Indy to Bowling Green, KY back in early April and it's worse going south than north. Just south of Louisville is the worst area. I slowed it down to about 60 MPH and it helped a little.
Keith and Lisa Ward
2019 Pinnacle 36FBTS
2021 Ford F350 XLT CC LB DRW 6.7L Diesel
Demco 18K Autoslide Hitch and Timbrens
2019 Ford F350 SB 6.7L Diesel (Gone)