WIS 30 is a freeway for its entire length and lies completely within the city of Madison.

West of the terminus, the road becomes Aberg Avenue which provides a shortcut to WIS 113 north, providing a near-direct through route to Dane County Regional Airport to the north via International Lane.

WIS 30 has three interchanges between termini: one at Fair Oaks Avenue, one at Stoughton Road (US 51) and a half-diamond at North Thompson Drive (CTH-T).

The Thompson Drive interchange features roundabouts at the ramp junctions with the crossing street.

[1] WIS 30 was the main route between the two largest cities in the state until I-94's completion in the late 1960s.