A project involving the construction of five roundabouts in a less than one mile span has truncated the highway's northern terminus to the freeway interchange with US-45, with the stretch of roundabouts between US-41 and US-45 now designated as County Trunk Highway FD (CTH-FD).

Upon reaching Menomonee Falls, the road expands into a four-lane boulevard for just over one mile (1.6 km), straddling the Waukesha–Milwaukee county line before intersecting with US 41/US 45 again.

Although it was originally planned to continue into the heart of downtown, the freeway ends after just under five miles (8.0 km) at which point it intersects with 68th Street and Hampton Avenue.

[citation needed] In October 1975, Milwaukee County Executive John Doyne proposed connecting this freeway with the Stadium North stub end, existing four miles (6.4 km) to the south.

While this gap closure has not been built to date due to public opposition, the current state trunk highway map shows a freeway planned for this corridor.