Latest News
The I-39/90/94 Corridor has officially transitioned from the study phase to the project phase, advancing into final design and preparing for future construction.
Visit the News and Meetings page to view the spring 2026 newsletter for the latest updates on the project progress.
The spring 2026 newsletter is now available on the News and Meetings page. Learn about the project activities planned for 2026.
The I-39/90/94 Corridor Project has completed an environmental study and has been approved for construction. Learn more about the planned improvements on the About page.
WisDOT held a series of Public Hearings in the summer of 2024. Learn about upcoming public meetings and view materials from previous meetings on the News and Meetings page.
WisDOT has resources to support businesses during construction. Learn about our In This Together Program on the For Businesses page.
Project Overview
The I-39/90/94 Corridor Project spans 67 miles in Dane, Columbia, Sauk and Juneau counties between US 12/18 in Madison and US 12/WIS 16 in Wisconsin Dells, including 15 existing interchanges and two potential new interchanges. The project also includes I-39 from where it splits from I-90/94 to Levee Road near Portage.
After years of study and public outreach, the corridor project is moving forward to final design and construction. Learn more about how this project will address existing and future traffic demands, safety issues, and aging and outdated infrastructure.
Traffic Impacts
Please drive safely in work zones: Slow down. Stay alert. Follow all posted sign instructions. Move over, or slow down, when you see workers and vehicles with flashing lights. Wear your seat belt and avoid distractions.
