4-lane through freeways near metro areas (and an interesting metric)

[ET21]

I'll try Chicago. I will count the Jane Byrne Circle Interchange as the Central Interchange, but since the I-55 junction is not far from the Circle, I will add it in also, but count Mileage as South on the Dan Ryan from the Circle exiting onto I-55/Stevenson to the Southwest

I-90 to the Northwest: 93 Miles to the IL/WI border near Beloit
I-94 to the North: 23 Miles, following US 41 onto Skokie Highway to the Clavey Rd Exit, since the Edens Spur Tollway/I-94 drops to only 4 Lanes. If the Edens Spur was at least 6 Lane, I believe this would be past Milwaukee before I-94 drops to 4 Lane. Or if I-94 were routed Kennedy->Tri-State->Wisconsin, it would also be well beyond Milwaukee
I-290 to the West: The whole route, to Lake Cook Rd (continuing as the IL 53 Freeway)/37 Miles. If the "Next City"  rule applies, then it needs to continue along Parent I-90 instead of IL 53, to the IL/WI border, 98 Miles. Or, using the idea that I-290->I-88 is the "Main"  route (even IDOT gives I-290 Outbound a Control of Aurora, at the Circle), then we have 40 miles, to the IL 56/Sugar Grove Exit. To satisfy the "Next City"  Rule, I-88 continues onto I-80 at the Quad Cities to Points West
I-90 to the Southeast: 18 Miles, to the Indiana Toll Road/IN 912/Cline Ave Exit
I-94 to the South, then East, then North: 105 Miles, to the I-196 Exit in Michigan
I-55 to the Southwest: 45 Miles, to the I-80 Cloverleaf

There's also the brief section of I-290 during the 294/88/Roosevelt Road interchange. That might be disappearing soon with the 294 rebuild