This morning, the intersection of Seippel Road and US 20 on the southwest corner of Dubuque closed permanently for construction of an interchange. Here’s the DOT announcement and a map from Dubuque that shows the area and the detour.
The street will be realigned to cross over 20 and become the western point of the Southwest Arterial, a project decades in the making. This is where future US 52 will split off from 20 and go southeast around Dubuque to US 61/151. The interchange won’t be open until 2020.