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Illinois Route 3
 Illinois Route 3 | ||||
|---|---|---|---|---|
 IL 3 highlighted in red | ||||
| Route information | ||||
| Maintained by IDOT | ||||
| Length | 187.44 mi[1] (301.66 km) | |||
| Existed | November 5, 1918[2]–present | |||
| Major junctions | ||||
| South end |   US 51 / IL 37 in Cairo | |||
| 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 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].
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