WIS 78 (Elma Avenue to County DL)

Merrimac, Columbia and Sauk counties

Schedule

Construction starts: March 18, 2026

Anticipated completion: June 5, 2026

 

Traffic impacts

WIS 78 will be closed to thru traffic during construction. A detour will utilize the following routes: WIS 113, WIS 33, and, I-90/94.