Interstate 70 in Illinois

Interstate 70
I-70 highlighted in red
Route information
Maintained by IDOT
Length	160 mi[1] (260 km)
NHS	Entire route
Major junctions
West end	I-70 at the Missouri state line in Brooklyn
Major intersections	I-55 / I-64 / US 40 / IL 3 in East St. Louis I-255 in Collinsville US 40 in Troy I-55 / I-270 in Troy US 51 in Vandalia I-57 near Effingham US 45 in Effingham US 40 near Marshall
East end	I-70 / US 40 at the Indiana state line near Marshall
Location
Country	United States
State	Illinois
Counties	St. Clair, Madison, Bond, Fayette, Effingham, Cumberland, Clark
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Illinois State Highway System Interstate US State Tollways Scenic
← IL 68 → IL 70

Interstate 70 (I-70) is a part of the Interstate Highway System that travels from Cove Fort, Utah, to Baltimore, Maryland. In the US state of Illinois, the highway travels 160 miles (260 km) from the Missouri state line at the Mississippi River in Brooklyn east to the Indiana state line near Marshall. I-70, which travels in a generally east-northeast direction across the state parallel to and sometimes concurrent with U.S. Route 40 (US 40), connects St. Louis and the Metro East region of Illinois with the Indiana cities of Terre Haute and Indianapolis, as well as many small towns along the northern edge of Southern Illinois and the southern tier of the Central Illinois region. Within Metro East, I-70 has interchanges with I-64 in East St. Louis and I-55 near Troy. I-70 also has interchanges with the two Interstates that form St. Louis's beltway: I-255 near Collinsville and I-270 at the I-55 junction near Troy. East of the Metro East region, I-70 meets US 51 in Vandalia and both I-57 and US 45 in Effingham. Like all Interstate Highways, I-70 is a part of the National Highway System for its entire length in Illinois.^[2]