The first changes to the routings of the predecessor highways were made by Wisconsin by 1920. A series of curves were added between Turtle Lake and Barron adding "stair steps" to the routing while similar jogs were removed near Cameron, Weyerhauser, Hawkins and Prentice. WIS 14 was rerouted between Rhinelander and Pelican Lake to run via Monico, and WIS 38 (the future US 141) was extended northward from Wausaukee to terminate at the state line near Niagara. The realignment between Rhinelander and Pelican Lake was shown as reversed by 1922. By 1925, the highway in that area was again rerouted to run directly from Rhinelander to Monico, but instead of turning south to Pelican Lake, it was run directly to Crandon. That same year, WIS 14 was extended eastward from Armstrong Creek to Pembine and northward to Niagara. The north–south section, previously numbered WIS 38, was also redesignated as part of WIS 57.