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I-180 in Illinois: a serious thread

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thspfc:
We've all poked fun at I-180 at some point. But it's actually an intriguing situation with very little precedent. What will IDOT do when it needs to be resurfaced/needs bridges replaced, etc.? Sinking money and time into what is effectively a useless freeway would be stupid, but it also costs money and time to demolish it. The most likely choice seems to be demolishing one of the carriageways and making the other a realigned IL-26/county road. What are some other options?

TheHighwayMan394:
One alternative is just to kill the E-W leg and downgrade it to IL 71, since the N-S portion is part of the marked route between Peoria and I-80.

JREwing78:
A downgrade to I-180 is probably at least 20 years down the road; IDOT is in the process of redecking the bridges over the Illinois River. It's probably cheaper to continue maintenance on the existing roadway than to demolish and downgrade.

If IDOT was flush with funding, 4-laning IL-29 between the end of I-180 and Peoria would make the route considerably more useful. But north of Sparland current traffic levels are well below even the point 4-laning makes sense. By traffic counts, I have an easier time making a case for a 4-lane US-20 between Freeport and Galena than I do a 4-lane IL-29.

Of course, we have IL-110 as precedent for a "Build it and they will come" attitude to building roadways (based on traffic numbers, they haven't come). If a politician with some cloud got it in their head it was worth the effort to 4-lane, it might happen. But I'm not holding my breath.

hbelkins:
Why was it built on the west side of the river, requiring a bridge, instead of on the east side?

Also, I saw a video recently that attempted to make the case that I-180 isn't flat.

Flint1979:

--- Quote from: hbelkins on October 11, 2021, 09:02:51 PM ---Why was it built on the west side of the river, requiring a bridge, instead of on the east side?

Also, I saw a video recently that attempted to make the case that I-180 isn't flat.

--- End quote ---
It'd still require a bridge, the river makes a bend.

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