After considering the possibilities for upgrading the two-lane stretch of US 30 between Lisbon and De Witt, the DOT appears to be settling on…a two-lane stretch of US 30 between Lisbon and De Witt.
In a public meeting on the planning study last week (handout) (large PDF), the future for this corridor will be a Super-2. This is a regular two-lane road with frequent passing lanes. The rebuilt US 169 between Humboldt and Fort Dodge is a recent example. The only segment that might be relocated later is the diagonal past Mechanicsville, which I think should be a grade-for-four-pave-for-two if not an outright extension of the four-lane opening this year.