Interstate 405 (California)
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Route
The San Diego Freeway splits away from the Golden State Freeway in the Mission Hills district of Los Angeles (Exits 73/158), becoming Interstate 405. From the northern San Fernando Valley it heads straight south toward the Santa Monica Mountains. After crossing over the Sepulveda Pass, its route roughly follows the outline of the Pacific coast, but between five and ten miles inland. It crosses the Los Angeles/Orange county line in Long Beach, then continues southeast through Orange County. It is joined by the Santa Ana Freeway in southeastern Irvine at the massive El Toro Y interchange, below which it merges back into Interstate 5 (at Exit 94).
Interstate 5 turns due south in Mission Viejo and continues in that direction until it reaches the bluffs overlooking the Pacific Ocean in Dana Point, at which point it once again turns southeastward to follow the contour of the shoreline. After passing through the 28 miles of Marine Corps Base Camp Pendleton in northern San Diego County, it travels through the wealthy northern suburbs of San Diego and into the city itself. In the Sorrento Valley district, the freeway ends, splitting into the unnamed final portion of I-5 and the Jacob Dekema Freeway (Interstate 805).
The San Diego Freeway's congestion problems are legendary, leading to the joke that the Interstate was named 405 because traffic moves at "four or five" miles an hour. Indeed, average speeds as low as five miles per hour are routinely recorded during morning and afternoon commutes, and its interchanges with the Ventura Freeway (milepost 63) and with the Santa Monica Freeway (milepost 53) each consistently rank among the five most congested freeway interchanges in the United States. While much of this gridlock has to do with the lack of alternate routes between many of the areas it connects (some of which, such as the Pacific Coast and Laurel Canyon freeways, were proposed but abandoned for political reasons), the freeway would likely be busy even with the addition of other roads and mass transit solutions, as it connects so many important locations in the Greater Los Angeles area.
Landmarks
Transportation
Commerce/Recreation
- Century City high-rise office park
- Marina del Rey
- More than ten California state beaches, as well as many owned by counties and municipalities, and many tourist-heavy beach cities
Education & Cultural
- California State University, Northridge
- The J. Paul Getty Center
- University of California, Los Angeles
- Loyola Marymount University
- California State University, Dominguez Hills
- California State University, Long Beach
- University of California, Irvine
- University of California, San Diego
Communities served
Communities along the route of the San Diego Freeway include
- Mission Hills
- North Hills
- Panorama City
- Van Nuys
- Sherman Oaks
- Bel Air
- Brentwood
- Westwood
- West Los Angeles
- Sawtelle
- Palms
- Mar Vista
- Culver City
- Ladera Heights
- Westchester
- Inglewood
- Hawthorne
- Lawndale
- Torrance
- Harbor Gateway
- Carson
- Long Beach
- Signal Hill
- Seal Beach
- Garden Grove
- Westminster
- Huntington Beach
- Fountain Valley
- Costa Mesa
- Irvine
- Laguna Hills
- Laguna Woods
- Lake Forest
- Mission Viejo
- Laguna Niguel
- San Juan Capistrano
- Dana Point
- San Clemente
- Marine Corps Base Camp Pendleton
- Oceanside
- Carlsbad
- Encinitas
- Solana Beach
- Del Mar
- Torrey Pines
- Carmel Valley
- Sorrento Valley
Major interchanges
Freeways intersecting the San Diego Freeway include:
- Golden State Freeway (Interstate 5)
- Ronald Reagan Freeway (California State Route 118)
- Ventura Freeway (U.S. Highway 101)
- Santa Monica Freeway (Interstate 10)
- Marina Freeway (California State Route 90)
- Century Freeway (Interstate 105) at the "Sadao S. Munemori Memorial Interchange"
- Harbor Freeway (Interstate 110)
- Long Beach Freeway (Interstate 710)
- San Gabriel River Freeway (Interstate 605)
- Garden Grove Freeway (California State Route 22)
- San Joaquin Hills Toll Road (California State Route 73)
- Costa Mesa Freeway (California State Route 55)
- Santa Ana Freeway (Interstate 5)
- California State Route 78
- Jacob Dekema Freeway (Interstate 805)
The O.J. Simpson Chase
While dangerous high-speed chases along the San Diego Freeway are not uncommon, perhaps the most famous chase in its history was also one of the slowest. On the afternoon of June 17, 1994, former football star O.J. Simpson, suspected in the murder of his ex-wife Nicole Brown Simpson and waiter Ronald Goldman, took to the freeway in a white Ford Bronco (driven by former USC teammate Al Cowlings) pursued by police, commencing a bizarre, widely televised low-speed chase that ended hours later when Simpson returned to his estate in Brentwood via the Sunset Boulevard exit and gave himself up to police.