Four Level Interchange

Infobox road
marker_

state=CA
highway_name=Four Level Interchange
alternate_name=Bill Keene Memorial Interchange
maint=Caltrans


cities=Hollywood
system=Southern California freewaysThe Four Level Interchange (officially Bill Keene Memorial Interchange) was the first stack interchange in the world. Completed in 1949 and fully opened in 1953 at the northern edge of downtown Los Angeles, California, USA, it connects U.S. Route 101 (Hollywood and Santa Ana Freeways) to State Route 110 (Harbor and Pasadena Freeways). In July 2006, the freeway interchange was officially named after Bill Keene, former KNX and KNXT traffic and weather reporter, although the new name is rarely used. Keene referred to the interchange as "The Stacks" and the "4-H Interchange". During the 1960s, Dick Whittinghill on radio station KMPC sometimes called it the Four Letter Interchange.

The interchange was constructed as a stack interchange because surrounding buildings and terrain made construction of a cloverleaf interchange impractical. Also, the mainline traffic of US 101 is at the top of the interchange, above the ramps, a rarity in stack interchanges. 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.

References

External links

* [http://cache.search.yahoo-ht2.akadns.net/search/cache?ei=UTF-8&p=Four+Level+interchange&fr=slv8-msgr&u=members.cox.net/mkpl/interchange/interchange.html&w=four+level+leveling+levels+interchange&d=IAEcZZzfQ9Jj&icp=1&.intl=us Four Level interchange-Los Angeles-Orange County Frwys]
* [http://www.dot.ca.gov/dist11/photogallery/fourlevel.htm Caltrans district-Four Level Interchange]
* [http://www.floodgap.com/roadgap/110/ Floodgap-Arroyo Seco Parkway]