Last month the Iowa DOT held a meeting in Tama about turning US 63 into a Super-2 highway. Two large PDFs are online. The project is scheduled for 2026. Traffic will be detoured onto IA 8 and IA 21 and US 30. The east-west segment from IA 96 to Traer will be signed as both “North 63” and “Detour South 63”.
There was a full-scale reconstruction of US 63 between Toledo and IA 96 in 1975. One might have happened since, but on the other hand, that pavement goes budda-budda-budda for a reason.
There is one passing lane on this segment now, at the turn to the Lincoln Historic Marker. There are two proposed southbound passing lanes and two proposed northbound passing lanes.
When you look at the large-scale view from the maps linked above, notice that 63 isn’t ramrod-straight. That’s kind of interesting.