[1] The route of WIS 32 and the Red Arrow marking is set in state statute by the Wisconsin Legislature.

[5] At the Illinois state line, IL 137 ends while WIS 32 begins as a continuation of it.

After the crossing, it bends west at Hamilton Street and then north at Douglas Avenue.

At the South Milwaukee-Cudahy town line, WIS 32 turns east via College Avenue and then back north again via Lake Drive.

[3] In the Bay View neighborhood, it crosses under Lake Parkway (WIS 794) without a direct interchange and a railroad overpasses.

Then, it intersects WIS 59 and then bends east via Pittsburgh Avenue just north of the two overpasses.

After another bascule bridge, it enters the Historic Third Ward where it briefly transitions into Young Street.

It then travels north via Milwaukee Street, following part of the streetcar route.

For northbound traffic, it continues north until it reaches Wells Street where it turns east.

Between Michigan and Wells Streets, westbound US 18 concurrently follows northbound WIS 32.

In Bayside, WIS 32 bends west, leaving Lake Drive northward.

At another diamond interchange (exit 93), WIS 32 diverged in favor of serving Port Washington.

As they reach Eagle River, they run concurrently with WIS 70; turning west and then north again.

They continue north until they reach the state line where WIS 32 ends.

The WIS 32 markers had since contained two red arrows pointing up (the only state trunk highway to have that in Wisconsin).

This was done in favor of transferring part of it from state maintenance to local control (now signed as CTH-W/CTH-PP).