The Southwest Arterial in Dubuque opened August 17. Stories: KCRG, KWWL, KDTH. (Sorry for the delay, but I’d been commuting an hour each way for more than a week and, well, *gestures omnidirectionally*.)
As of Sunday, all US 52 signage remained intact in downtown Dubuque and IA 32 remained signed, and new 52 is unsigned between the US 61/151 interchange and the former south end of the split, which is now the north end of the split on a wrong-way multiplex. Until that changes (Labor Day weekend, maybe?), 52 is signed in multiple places at once, although because of construction between Luxemburg and Sageville, it’s actually been routed on much of its new route for months.