Four Level Interchange

Four Level Interchange
Bill Keene Memorial Interchange
Four Level Interchange of Arroyo Seco Parkway, Harbor Freeway, Santa Ana Freeway and Hollywood Freeway, looking northeast in January 1999
Location
Los Angeles, California
Coordinates	34°3′45″N 118°14′54.96″W / 34.06250°N 118.2486000°W / 34.06250; -118.2486000
Roads at junction	SR 110 (Arroyo Seco Parkway / Harbor Freeway) US 101 (Hollywood Freeway / Santa Ana Freeway)
Construction
Type	Four-level stack interchange
Constructed	1949
Opened	1953
Maintained by	California Department of Transportation

The Four Level Interchange (officially the Bill Keene Memorial Interchange) is the first stack interchange in the world.^[1] Completed in 1949 and fully opened in 1953 at the northern edge of Downtown Los Angeles, California, United States, it connects U.S. Route 101 (Hollywood Freeway and Santa Ana Freeway) to State Route 110 (Harbor Freeway and Arroyo Seco Parkway). In 2006, the interchange was officially renamed in the memory of Los Angeles traffic and weather reporter Bill Keene.