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

Interstate 55

I-55 highlighted in red
Route information
Length964.25 mi (1,551.81 km)
Existed1957–present
NHSEntire route
Major junctions
South end I-10 in LaPlace, LA
Major intersections
North end US 41 in Chicago, IL
Location
CountryUnited States
StatesLouisiana, Mississippi, Tennessee, Arkansas, Missouri, Illinois
Highway system

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.

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