Make aU-TURN and go back to Wisconsin
Take 41 north or M-35 to get to Escanaba and around the lake to Chicago. You might want to consult a map first to see which way is more intelligent. Be careful, M-35 is quick; you'll be in Chicago before you know it!
These signs do not really exist. The welcome sign is just a little Michigan humor. There is no interchange here, it is just an at-grade city intersection.