I've tried to sound the alarm and warning about Indiana Interstates for years now! Avoid interstates. Take the US Highways. East-West? US-40, US-50, US-36, US-24, US-27, US-30. North-South take US-31, US-52, US-231, US-421.
Interstate 70 from Indianapolis to Ohio has always been a disaster zone. I-75 going to Cincinnati? About 3 years ago they had that stretch of interstate baby-but smooth. I was fortunate to drive it, but only once. I thought, AH! Finally roads are getting fixed. Two weeks later drove the same road again towing the trailer, and thought I'd have a wreck. They'd dug everything up again, making trenches across every few miles. Truck parts scattered everywhere. One section, I slowed down to 25 mph and rode the shoulder with the trailer it was so bad.
I-70 from Indy to Illinois was just done. Drove it this last August, but already there are spots they are digging up. It just doesn't make sense.
Take US Highways! Speed limits are 60 mph, they are 4 lane, and provide a much smoother ride!
Indiana Interstates just suck! It's been this way for a long, long time!
The county road I live on is smoother than the interstates! Really! And I really think the remaining gravel roads in Park County are smoother than the interstates too!