I-39/90 Expansion Project

Illinois state line to Madison, Dane and Rock counties

WIS 26 (Milton Avenue) interchange

WisDOT will construct a Diverging Diamond Interchange (DDI) at the I-39/90 and WIS 26 (Milton Avenue) interchange in Janesville. The new DDI is anticipated to open in fall 2021 (subject to change).

Why a DDI at the I-39/90 and WIS 26 interchange?

DDIs typically perform best at locations with heavy left turn volumes, like the WIS 26 interchange in Janesville. In addition, the potential for increased safety due to a reduction in the number of conflict points at the interchange is the primary benefit of the DDI design at this location.

Video

Brochures

The following documents are in Adobe PDF PDF format.
(Note: Some files are large and may take longer to download depending on individual connection speeds. Users may need to zoom in to see details.)

How to Navigate the WIS 26/Milton Avenue DDI: