The official detour is along Hwy V V / 45th to Hwy 147, then along 147 to 22nd (and back on 42). From the south, simply reverse. Garfield will be open as will Jackson. A couple of cross streets 24th and 34th should remain open through most of the project.
The project start-up and the road closure, will start Monday (20th) or Tuesday (21st) of next week. The highway should remain open through the weekend.