More US 31 upgrades between Indy and South Bend

[NWI_Irish96]

this would be a direct route designation and would avoid a 100+ mile detour to I-69. Chicago to Kansas City has had several all freeway alternatives

Not sure how you're getting a 100+ mile detour to I-69.

Indy to Grand Rapids via:
US 31/I-196: 260 miles
I-69/I-94/US 131: 298 miles
I-69/I-96: 309 miles

Also 305 miles via I-65/I-94/I-196