U.S. Route 51 in Illinois

U.S. Route 51
Route information
Maintained by IDOT
Length:	415.95 mi (669.41 km) Length may include both directions of route where it is routed along one-way streets.
Major junctions
South end:	US 51 / US 60 / US 62 near Wickliffe, KY
	I-57 near Cairo I-64 near Richview I-70 at Vandalia I-72 at Decatur I-39 / I-55 / I-74 at Bloomington/Normal I-80 at La Salle I-88 at Rochelle I-90 at Rockford I-39 / I-90 at South Beloit
North end:	US 51 at the Wisconsin state line in South Beloit
Highway system
United States Numbered Highway System List Special Divided Replaced Illinois State Highway System Interstate U.S. State Tollways ← IL 50 US 52 →

I-57 near Cairo
I-64 near Richview
I-70 at Vandalia
I-72 at Decatur
I-39 / I-55 / I-74 at Bloomington/Normal
I-80 at La Salle
I-88 at Rochelle
I-90 at Rockford

...
Wikipedia