Indiana! Don't ya just love us here! I started avoiding all Indiana interstates several years ago. I'll drive out of my way to avoid them.
North-South: Highway 31, Highway 13 and 37, Highway 27.
East-West, Avoid highway 6 (Northern Indiana. Its good in some places, awful in others.
Highway 24 is pretty good,
Highway 28 is pretty good,
Highway 32 is pretty good,
Highway 40 is pretty good.
You've got to remember though, the secondary roads are all 55 mph or less and often go through villages and town, and you've got local traffic to contend with.
There's no real good way to to go SW to NE or SE to NW directions in Indiana. Lots of turns either way.
Actually, I live on a county road in Madison County, and (you may not believe it), but the road I live on is smoother and better maintained than I-69 and I-70! REALLY!
Take the back roads, slow down, and maybe it won't be so stressful going through Indiana!
