Designated in 1992 and completely signed by 1998, Interstate 39 totals 182.72 miles in the Badger State. The freeway designation runs concurrently with Interstate 90 from Illinois at Beloit, north toward Madison, where Interstate 94 joins the pair. The three overlap between the capital city to a point just south of Portage. There I-39 combines with U.S. 51 north to Plover, Stevens Point and Wausau.
Interstate 39 currently ends at an interchange with Wis 29 west of Downtown Wausau. The U.S. 51 freeway continues north the terminus another 24 miles to Merrill, and as a varying expressway / freeway to Tomahawk and the Oneida County line.
The I-39/90 Expansion Project underway through 2021 rebuilds a 45-mile stretch of Interstates 39 and 90 from the Illinois state line to Madison. Work modernizes the freeway by rebuilding bridges, reconfiguring outdated interchange designs and widening the freeway to six or eight overall lanes. One of the larger projects is the Systems Interchange planned for the junction with Interstate 43 north and Wis 81 west. Work there runs from summer 2019 to fall 2012.
Interstate 39 Wisconsin Guides
- I-39/90 North - Rock County
- I-39/90 North - Dane County
- I-39/90/94 North - Madison to Portage
- North - Portage to Westfield
- North - Coloma to Stevens Point
- North - Stevens Point to Wausau
Page Updated 04-29-2016.