Make a U-TURN and go back to Milwaukee.
U.S. 45 is a nice freeway going through West Bend and then ending just before Kewaskum. There are no known current plans for expansion of this freeway. U.S. 45 could easily bypass Kewaskum, as there is plenty of room. This road has potential to be an alternate route to Fon du Lac, or possibly run up the east side of Lake Winnebago to Appleton. But that is unlikely to happen, and definitely not anytime soon.