This segment extends approximately 12 miles along I-39/90 from the Illinois state line north to County O, south of Janesville. The Interstate will be reconstructed and expanded to six lanes from the Illinois state line north to WIS 11 (Avalon Rd.). Eight lanes (four lanes in each direction) will continue from WIS 11 (Avalon Rd.) north to County O, south of Janesville.
Interchanges to be reconstructed include:
- I-43/WIS 81
- County S (Shopiere Rd.) – completed in 2015
- WIS 11 (Avalon Rd.) – completed in 2016
The reconstruction will address roadway deficiencies. Grade separated crossings along the segment are also included in the reconstruction.
The I-39/90 Expansion Project began in 2015 and is currently anticipated to be completed in 2022.