The longest interstate in the Badger State, Interstate 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 the merge with Interstate 90 near Tomah, where the two combine southeast to Wisconsin Dells.
Interstate 94 Wisconsin Guides
Interstate 39 south merges with 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 analyzes existing and future conditions of the corridor and addresses long range plans to deal with increasing traffic. A Final Environmental Impact Statement (FEIS) is anticipated for completion in 2019, with design work possibly starting in 2020. Potential construction would start in 2025.1
Straddling eastern reaches of the capital city, Interstate 94 branches east for a solo trek 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 along side 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 Interstates 43 and 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 Interstate 41 [U.S. 41] from south Milwaukee by Racine and Kenosha to Pleasant Prairie and the Illinois state line.