Interstate 55

Interstate 55
Interstate 55
	I-55 highlighted in red
Route information
Length	964.25 mi (1,551.81 km)
Existed	1957–present
NHS	Entire route
Major junctions
South end	I-10 in LaPlace, LA
	I-20 / US 49 in Jackson, MS; I-69 in Hernando, MS; I-40 / US 61 / US 64 / US 70 / US 78 / US 79 in West Memphis, AR; I-57 / US 60 in Sikeston, MO; I-44 / I-64 / US 40 in St. Louis, MO; I-70 / US 40 from East St. Louis to Troy, IL; I-74 in Bloomington, IL; I-39 / US 51 in Normal, IL; I-80 in Channahon, IL; I-90 / I-94 in Chicago, IL;
North end	US 41 in Chicago, IL
Location
Country	United States
States	Louisiana, Mississippi, Tennessee, Arkansas, Missouri, Illinois
Highway system
	Interstate Highway System; Main; Auxiliary; Suffixed; Business; Future;

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 highway travels from LaPlace, Louisiana, at I-10 to Chicago, Illinois, at Lake Shore Drive (US 41), near McCormick Place. The major cities that I-55 connects to are (from south to north) Jackson, Mississippi; Memphis, Tennessee; and St. Louis, Missouri.

The section of I-55 between Chicago and St. Louis was built as an alternate route for U.S. Route 66 (US 66). The Interstate crosses the Mississippi River twice: once at Memphis and again at St. Louis.