I-39/90/94 Study

Project location | Project overview | Schedule | Status/phase | Contact information

Project location

I-39/90/94 from US 12/18 in Madison to the US 12/WIS 16 interchange in Wisconsin Dells

View I-39/90/94 Study in a larger map.

Project overview

  • The Wisconsin Department of Transportation (WisDOT) and the Federal Highway Administration (FHWA) are conducting the I-39/90/94 Corridor Study between US 12/18 in Madison and US 12/WIS 16 in Wisconsin Dells. The study will also evaluate I-39 from where it splits from I-90/94 to Levee Road near Portage. The study corridor is about 67 miles long and travels through Dane, Columbia, Sauk and Juneau counties.
  • The purpose of the I-39/90/94 Corridor Study is to address existing and future traffic demands, safety issues, aging and outdated infrastructure.
  • WisDOT will identify project needs and evaluate a range of alternatives in an environmental impact statement (EIS). The EIS process, which will include ongoing opportunities for public involvement, will lead to the identification of a preferred alternative.
  • Project overview

*Please note, off alignment options are not being considered for this study


  • 2024
    • Finalize environmental impact analysis
    • Public hearing
    • Complete environmental document
    • Ongoing public involvement activities

For more information about public involvement opportunities and other activities, visit the I-39/90/94 Corridor Study – Public involvement page.


  • Environmental study with no construction activities planned at this time.

Contact information

WisDOT welcomes comments and suggestions related to this study.

David Schmidt, P.E.
WisDOT Study Manager
(608) 246-3867

Jennifer Kobryn
WisDOT Study Supervisor
(608) 246-3800

Michael Bie
WisDOT Region Communications Manager
(608) 246-7928

Wisconsin Department of Transportation (WisDOT)
Southwest Region, Madison Office
2101 Wright Street
Madison, WI 53704
Phone: (608) 246-3800
Email: swr.dtsd@dot.wi.gov