[2] The highway follows Meadowbrook Road and is maintained by the Wisconsin Department of Transportation (WisDOT).

Heading north, and after crossing Northview Road, it rises up to Rolling Ridge Drive and the entrance to Meadowbrook Elementary School in the Waukesha School District.

WIS 318 was established by WisDOT in late 2017 when the Waukesha West Bypass was formed.

US 18 was rerouted through Downtown Waukesha and now uses the new bypass and Les Paul Parkway.

Before construction on a new interchange with I-94 in the late 1990s, the road descended down a steep grade of about 79 feet (24 m) just north of Meadowbrook School.