Illinois Route 251 is a north–south state highway that runs on the former alignment of U.S. Route 51 before Interstate 39 was built in north central Illinois. It runs from U.S. 51 at the border with W
Aerial view of I-39 (left) and IL 251 (right) in Minonk
Interstate 39 is a north–south Interstate Highway in Illinois and Wisconsin that runs from an interchange at I-55 in Normal, Illinois, to State Trunk Highway 29 approximately six miles south of Wausau
Illinois Route 251
…Illinois Route 251 is a north–south state highway that runs on the former alignment of U.S. Route 51 before Interstate 39 was built in north central Illinois. It runs from U.S. 51 at the border with Wisconsin to I-39 and U.S. 51 south of Kappa. Illinois 251 is 135.32 miles…
I-39/US 51 in northern Wisconsin
Northern terminus of I-39 at the interchange with WIS 29 near Wausau