Interstate 64 in Missouri

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Interstate 64
U.S. Route 40
I-64 highlighted in red
Route information
Maintained by MoDOT
Length	40.817 mi[1] (65.689 km)
Existed	1987–present
NHS	Entire route
Major junctions
West end	I-70 / US 40 / US 61 in Wentzville
Major intersections	Route 364 in Lake St. Louis I-270 in Town and Country US 61 / US 67 in Frontenac I-170 in Richmond Heights I-55 / I-44 in St. Louis
East end	I-55 / I-64 / US 40 in St. Louis
Location
Country	United States
State	Missouri
Counties	St. Charles, St. Louis, City of St. Louis
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Missouri State Highway System Interstate US State Supplemental
← US 63 → Route 64

Interstate 64 (I-64) passes through the Greater St. Louis area in the US state of Missouri. The entire route is concurrent with U.S. Route 40 (US 40). Because the road was a main thoroughfare in the St. Louis area before the development of the Interstate Highway System, it is not uncommon for locals to refer to the stretch of highway as "Highway 40" rather than "I-64". On December 6, 2009, the portion of the highway running through the city of St. Louis was named the Jack Buck Memorial Highway in honor of the late sportscaster.^[2]