Then, WIS 138 superseded part of WIS 106 from Stoughton to US 14 near Oregon. In late-1978, US 14 was moved onto a newly built expressway around Oregon.
Following the implementation of WIS 138 in 1978, part of WIS 106 between Stoughton and US 14 near Oregon was replaced. Later that year, US 14 was moved to a new expressway encircling Oregon.