WIS 59 remains concurrent with US 14 until reaching Union then heads east through Cooksville and Edgerton, then junctions with Interstate 39/Interstate 90 (I-90/I-90) and then crossing the Rock River near Newville.
WIS 59 follows a similar path as US 14 until reaching Union, then continues east through Cooksville and Edgerton before merging with Interstate 39/Interstate 90 (I-39/I-90) and crossing the Rock River near Newville.