Lots of road construction projects are beginning this week all around Sioux Falls, creating significant traffic impacts across the city. Key Closures Starting September 22:Spring Avenue & 21st Street - Both streets closed through Friday for utility and paving work by Soukup Construction. Spring Avenue closed between 21st-22nd Streets, while 21st Street is blocked from Spring to Minnesota Avenue. Through traffic to Brandon should detour via 60th Street North usingVeterans Parkway and Cliff Avenue. Motorists should use North Minnesota Avenue, East Benson Road, and North Fourth Avenue as detours.