The U.S. 20 Corridor Association met in Sac City (which is no longer directly on US 20), and the Fort Dodge Messenger has a report.
The immediate next step in upgrading 20 to four lanes will be between Moville and Correctionville. In the five-year plan, new lanes will be graded and bridges built between Moville and Correctionville this year, but not paved until 2016. The two lanes built after that will not be directly on top of the existing lanes (and section line), but nearby.
The Messenger reports the DOT engineer at the meeting said it would cost $400 million to finish the 44 miles of US 20 in Iowa that are not four lanes.