Aerial photo of the Four Level Interchange; the stack configuration of the interchange is readily apparent (downtown Los Angeles is towards the bottom of this image).

The Bill Keene Memorial Interchange, popularly known as Four Level Interchange was the first stack interchange in the world. Opened in 1953 at the northern edge of downtown Los Angeles, California, USA, it connects the Harbor, Hollywood, Pasadena, and Santa Ana freeways. In July 2006, the freeway interchange was officially named The Bill Keene Memorial Interchange, in honor of the late KNX and KNXT traffic and weather reporter, although the new name is rarely used. Image File history File linksMetadata Download high resolution version (680x686, 529 KB) Summary The Four Level Interchange. ... Image File history File linksMetadata Download high resolution version (680x686, 529 KB) Summary The Four Level Interchange. ... A stack interchange is a free-flowing junction between two or more roads that allows turning in all directions. ... 1953 (MCMLIII) was a common year starting on Thursday. ... Flag Seal Nickname: City of Angels Location Location within Los Angeles County in the state of California Coordinates , Government State County California Los Angeles County Mayor Antonio Villaraigosa (D) Geographical characteristics Area     City 1,290. ... Official language(s) English Capital Sacramento Largest city Los Angeles Area  Ranked 3rd  - Total 158,302 sq mi (410,000 km²)  - Width 250 miles (400 km)  - Length 770 miles (1,240 km)  - % water 4. ... The Harbor Freeway goes under many bridges as it passes through downtown Los Angeles The Harbor Freeway is one of the principal north-south freeways in Los Angeles County, California. ... The Hollywood Freeway is one of the principal freeways of Los Angeles, California (the boundaries of which it does not leave) and one of the busiest in the United States. ... California State Route 110 extends from from California State Route 47 in San Pedro, California to Glenarm Street in Pasadena, California, USA. Most of Route 110 south of Interstate 10 is designated Interstate 110; the southernmost section is again signed as a state route. ... Southern California freeways The Santa Ana Freeway is one of the principal freeways in Southern California, connecting Los Angeles, California and its southeastern suburbs. ... KNX is a Los Angeles, California, clear channel radio station operating on 1070 kHz with 50,000 watts of power from a transmitter site in Torrance, and a key West Coast station for the CBS Radio Network. ... KCBS is the callsign of the Columbia Broadcasting Systems three flagship broadcast stations in the United States: KCBS-TV (Channel 2) is the CBS television affiliate serving the Los Angeles area. ...

The interchange was constructed as a stack interchange because surrounding buildings and terrain made construction of a cloverleaf interchange impractical. Its distinctive architecture has long made it a symbol of Los Angeles' post-World War II development, and it appears on numerous postcards of the 1950s and 1960s. A cloverleaf interchange is a two-level interchange in which right turns (in countries that drive on the left) are handled by loop ramps. ... Combatants Allied powers: China France Great Britain Soviet Union United States and others Axis powers: Germany Italy Japan and others Commanders Chiang Kai-shek Charles de Gaulle Winston Churchill Joseph Stalin Franklin Roosevelt Adolf Hitler Benito Mussolini Hideki Tōjō Casualties Military dead: 17,000,000 Civilian dead: 33,000... British postal card, used in 1890 A postcard or post card is typically a rectangular piece of thick paper or thin cardboard intended for writing and mailing without an envelope and at a lower rate than a letter. ... // Recovering from World War II and its aftermath, the economic miracle emerged in West Germany and Italy. ... The 1960s decade refers to the years from January 1, 1960 to December 31, 1969, inclusive. ...

The interchange was once called The Stacks and the 4-H Interchange, mostly by veteran traffic reporter Bill Keene. A traffic report is an element of a radio program that informs the listeners as to the state of roads within the broadcast area. ...

Currently, the interchange comprises the following major highways:

• U.S. Route 101 Hollywood Freeway/Santa Ana Freeway
• State Route 110 Pasadena Freeway/Harbor Freeway

Image File history File links US_101_(CA). ... This U.S. Highway article needs to be cleaned up to conform to both a higher standard of article quality and accepted design standards outlined in the WikiProject U.S. Highways. ... The Hollywood Freeway is one of the principal freeways of Los Angeles, California (the boundaries of which it does not leave) and one of the busiest in the United States. ... Southern California freeways The Santa Ana Freeway is one of the principal freeways in Southern California, connecting Los Angeles, California and its southeastern suburbs. ... Image File history File links No higher resolution available. ... California State Route 110 (Pasadena Freeway) highlighted in red. ... California State Route 110 extends from from California State Route 47 in San Pedro, California to Glenarm Street in Pasadena, California, USA. Most of Route 110 south of Interstate 10 is designated Interstate 110; the southernmost section is again signed as a state route. ... The Harbor Freeway goes under many bridges as it passes through downtown Los Angeles The Harbor Freeway is one of the principal north-south freeways in Los Angeles County, California. ...

External links

• Maps and aerial photos Coordinates: 34.0625° -118.2486°
  • Satellite image from WikiMapia, Google Maps or Windows Live Local
  • Street map from MapQuest or Google Maps
  • Topographic map from TopoZone
  • Aerial image from TerraServer-USA