The longest interstate in the Badger State, I-94 travels 348.2 miles through Wisconsin. The freeway enters the state from across the St. Croix River into the city of Hudson. Becoming rural east from there, I-94 advances to Menomonie, Elk Mound and Eau Claire. The freeway runs along the west and south sides of the Eau Claire area before turning southeastward, and resuming with a rural course to converge with Interstate 90 near Tomah. The two combine southeast from there to Wisconsin Dells.
Interstate 94 Wisconsin Guides
Interstate 39 south joins I-90/94 east outside Portage. The three routes travel south to Madison. The freeway between the two cities was constructed from 1959 to 1962. A 30 mile section of freeway was later reconstructed from four to six lanes in 1984. I-39 was extended to Wausau along the corridor in 1996. The I-39/90/94 Interstate Study started in 2014. It analyzed existing and future conditions of the corridor and addresses long range plans to deal with increasing traffic. The Final Tier 1 Final Environmental Impact Statement (FEIS) was completed in 2018. Work continued on the Tier 2 National Environmental Policy Act (NEPA) Document through 2022. Potential construction would start in 2025.1
Straddling eastern reaches of the capital city, Interstate 94 branches east to Milwaukee while I-39/90 curve southeastward toward Lake Koshkonong. I-94 increases in traffic toward Wisconsin's largest city through Oconomowoc, Waukesha and Pewaukee.
Within the Milwaukee metropolitan area, I-894 forms a suburban loop alongside Interstate 41 and U.S. 45 south from the Zoo Interchange through West Allis and east along the Airport Freeway (I-43) through Greendale. Interstate 94 follows the East West Freeway to the Marquette Interchange with I-43/794. Interstate 794 spurs east to Downtown and the Milwaukee lakefront and port while I-43 accompanies I-94 southward along the North South Freeway to the Airport Interchange with I-41/894. The remainder of Interstate 94 runs concurrently with I/41 [U.S. 41] from south Milwaukee by Racine and Kenosha to Pleasant Prairie and the Illinois state line.
- WisDOT I-39/90/94 Study Public Involvement Meeting study display boards. accessed April 28, 2016.
Page Updated 10-29-2019.