Illinois Route 4
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| Route information | ||||
| Maintained by IDOT | ||||
| Length: | 170.44 mi (274.30 km) | |||
| Existed: | November 5, 1918 – present | |||
| Major junctions | ||||
| South end: |
  IL 13 / IL 127 in Vergennes
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 I-64 in Lebanon US 50 in Lebanon US 40 in St. Jacob I-70 in Marine I-55 in Livingston  I-72 / US 36 in Springfield
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| North end: |
 I-55 Bus. in Springfield
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| Location | ||||
| Counties: | Jackson, Perry, Randolph, Washington, St. Clair, Madison, Macoupin, Sangamon | |||
| Highway system | ||||
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Illinois Route 4 is a long state road that runs south from the Interstate 55 business loop around the state capital of Springfield, south to Illinois Route 13 just north of Murphysboro. This is a distance of 170.44 miles (274.30 km).
Illinois 4 starts at Illinois 13 and Illinois 127 at a point about eight miles (13 km) north of Murphysboro. It zigzags through small southern towns such as Steeleville, Sparta, and Marissa, before straightening out near Mascoutah. Illinois 4 is an important road in St. Clair and Madison Counties since it connects many towns on the outskirts of the wider St. Louis metropolitan area (Greater St. Louis; specifically, the Illinois portion, the Metro-East Area). From Carlinville to Springfield, the route is also important since it connects many good-sized towns in Macoupin and Sangamon Counties. Illinois 4 passes through Chatham, a fast-growing city outside of Springfield, before reaching the state's capitol.
Illinois 4 in Springfield is known as Veterans Parkway. It completes the western loop around the city of Springfield, and is a divided four-lane highway that serves Springfield commercial areas such as White Oaks Mall.
It is also worth noting that the northbound lane of IL 4 is in Washington County for less than one mile (1.6 km), on its southwest corner near the unincorporated town of Clarmin where it runs concurrently with IL 13.
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Wikipedia