 US 18 then enters Waukesha along Summit Avenue.US 18 turns south from Summit Avenue on the new section of Les Paul Parkway (aka the new Waukesha West Bypass) and goes the entire route of Les Paul Parkway going around the West, South and East areas of the City of Waukesha along with the current WI 59 and WI 164 configuration from County Highway X and US 18 joins back up at Moreland Boulevard at the northeast terminus at the Les Paul Parkway/Wolf Road intersection.So US 18 is now re-routed by using Les Paul Parkway and doesn't go through Downtown Waukesha anymore.