From the Gazette: “Highway 100 extension on schedule and budget”
From the Sioux City Journal: “Highway 20 widening heads to finish line”
Both of these projects are expected to be completed by the end of the decade, and the I-74 bridge is just beyond that timespan.
Five-laning US 20 — an undivided four with a center turn lane, much like a city arterial — for a short distance in Correctionville was the only upgrade in Iowa in 2015, and whether that counts is debatable. IA 31 was rerouted to the west side of town ahead of a detour that will use it and old 20 while new lanes are built to the west.
Meanwhile, regarding a project that hasn’t started, the Ames Tribune says the DOT still plans to close at-grade intersections on US 30 between I-35 and Nevada over objections from the county supervisors and nearby landowners.