Illinois Route 3

Illinois Route 3
Illinois Route 3
	IL 3 highlighted in red
Route information
	Maintained by IDOT
Length	187.44 mi (301.66 km)
Existed	November 5, 1918–present
Major junctions
South end	US 51 / IL 37 in Cairo
	I-255 / US 50 from Columbia to Cahokia; I-55 / I-64 / US 40 in East St. Louis; I-55 / I-64 / I-70 / US 40 in East St. Louis; I-270 in Granite City; US 67 in Alton;
North end	IL 100 in Grafton
Location
Country	United States
State	Illinois
Counties	Alexander, Union, Jackson, Randolph, Monroe, St. Clair, Madison, Jersey
Highway system
	Illinois State Highway System; Interstate; US; State; Tollways; Scenic;

Illinois Route 3 (IL 3) is a 187.44-mile-long (301.66 km) major north–south arterial state highway in southwestern Illinois. It has its southern terminus at Cairo Junction (about four miles (6.4 km) north of Cairo) at the intersection of U.S. Route 51 (US 51) and Illinois Route 37, and its northern terminus in Grafton at IL 100.

^ Illinois Technology Transfer Center (2007). "T2 GIS Data". Illinois Department of Transportation. Retrieved November 8, 2007.
^ Carlson, Rick (March 15, 2006). "Routes 1 through 20". Illinois State Highways Page. Retrieved March 24, 2006.^{[self-published source]}.

[t2-1] Illinois Technology Transfer Center (2007). "T2 GIS Data". Illinois Department of Transportation. Retrieved November 8, 2007.

[n9jig-2] Carlson, Rick (March 15, 2006). "Routes 1 through 20". Illinois State Highways Page. Retrieved March 24, 2006.^{[self-published source]}.

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