Last week, shortly after the first diverging diamond interchange in Iowa opened in Dallas County, the Iowa DOT released plans for a second interchange of that style, also in the Des Moines metro area.
The DOT has multiple maps and the Register has an article ahead of a meeting scheduled for Dec. 15. The DOT is going to six-lane I-35 from 1st Street (former IA 931) to the north Ankeny exit that opened in 2011. The 1st Street exit will be turned from a diamond into a diverging diamond. However, this project will not be completed until the end of this decade — and honestly needed to be done a decade ago.
(Bonus: If you look reeealllly close at the fifth map, you can see the main building for the former southbound rest area intact in the satellite photo, something Austin Draude noticed a year ago.)