U.S. Route 51 in Illinois
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U.S. Route 51 in the U.S. state of Illinois, is a main north–south artery that runs from the Ohio River north to the Wisconsin border, a distance of 415.95 miles.
Southbound US 51 approaching Cairo
Interstate 39
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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
U.S. Route 51 in Illinois
…north to Bloomington–Normal as an expressway. At Bloomington–Normal, US 51 follows I-74 for a mile, then I-55 for seven miles (11 km), before following I-39 for 140 miles (230 km). US 51 follows I-39, intersecting I-80 and I-88 along the way. The highway also follows US 20 south of Rockford (while still…
Aerial view of I-39 as it passes Minonk, Illinois, April 2012
I-39/US 51 in northern Wisconsin
Northern terminus of I-39 at the interchange with WIS 29 near Wausau