Illinois Route 15 (IL 15) is a east–west highway in

southern Illinois Southern Illinois, also known as Little Egypt, is the southern third of Illinois, principally along and south of Interstate 64. Although part of a Midwestern United States, Midwestern state, this region is aligned in culture more with that of th ...

with its western terminus at

Illinois Route 3 Illinois Route 3 (IL 3) is a major north–south arterial state highway in southwestern Illinois. It has its southern terminus at Cairo Junction (about north of Cairo) at the intersection of U.S. Route 51 (US 51) and Illinois Ro ...

, U.S. Route 40,

I-55 Interstate 55 (I-55) is a major Interstate Highway in the central United States. As with most primary Interstates that end in a five, it is a major cross-country, north–south route, connecting the Gulf of Mexico to the Great Lakes. The h ...

, and

I-64 Interstate 64 (I-64) is an east–west Interstate Highway in the Eastern United States. Its western terminus is at I-70, U.S. Route 40 (US 40), and US 61 in Wentzville, Missouri. Its eastern terminus is at an interchang ...

, and its eastern terminus at

Wabash River The Wabash River ( French: Ouabache) is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed May 13, 2011 river that drains most of the state of Indiana in the United States. It flows fro ...

at the Illinois/Indiana Border where it meets State Road 64.

History

West of Mt. Vernon, IL 15 was part of US 460. Until the 1960s, IL 15 went on the IL 160 corridor from Addieville to Okawville, then west on the present IL 177 corridor to Belleville. The section from Nashville to St. Libory was once IL 110, but this was back in the 1940s before US 460 was signed. The current route was determined in 1967. US 460 was truncated in 1974. In 2011, the old

Parker truss A truss bridge is a bridge whose load-bearing superstructure is composed of a truss, a structure of connected elements, usually forming triangular units. The connected elements (typically straight) may be stressed from tension, compression, or s ...

bridge crossing the Wabash River was replaced by a beam bridge.

Major intersections

References

External links

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Illinois Highway Ends: Illinois Route 15
015 Illinois 015 Transportation in Wabash County, Illinois Transportation in St. Clair County, Illinois Transportation in Washington County, Illinois Transportation in Jefferson County, Illinois Transportation in Wayne County, Illinois Transportation in Edwards County, Illinois