Fact Box

Interstate 55

Length- 964 miles

South end- Laplace, LA

North end- Chicago, IL

States served- LA, MS, TN, AR, MO, IL

Interstate 55 (I-55) is a major north–south Interstate Highway in the central United States. The highway travels from LaPlace, Louisiana, at I-10 to Chicago at U.S. Route 41 (US 41, Lake Shore Drive), at McCormick Place.

The section of I-55 between Chicago and St. Louis was built as an alternate route for US 66. It crosses the Mississippi River twice: once at Memphis, Tennessee, and again at St. Louis, Missouri.

Major intersections

Louisiana

I‑10 in Laplace

I‑12 in Hammond

Mississippi

I-20 in Jackson (concurrent for two miles (3.2 km)}

I-220 in Ridgeland

I-69 in Hernando

Tennessee

      I-240 in Memphis

Arkansas

I-40 in West Memphis (concurrent for three miles (4.8 km))

Missouri

I-155 in Hayti

I-57 in Sikeston

I-270 / I-255 at Mehlville just south of St. Louis (both intersections at the same interchange)

I-44 in St. Louis. These two highways are concurrent for just three miles (4.8 km) within city of St. Louis.

I-64 in St. Louis. These two highways are concurrent for just three miles (4.8 km) across the Mississippi River to East St. Louis, Illinois.

Illinois

I-70 in East St. Louis. These two highways concurrent for about sixteen miles (26 km) from East St. Louis until exit 20 near Troy.

I-255 just west of Collinsville

I-270 east of Glen Carbon

I-72 in Springfield (concurrent for six miles (9.7 km))

I-155 west of Lincoln

I-74 in Bloomington (concurrent for six miles (9.7 km))

I-39 in Bloomington

I-80 in Joliet

I-355 in Bolingbrook

I-294 in Burr Ridge

I-90 / I-94 (Dan Ryan Expressway) in Chicago