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    https://en.wikipedia.org/wiki/Interstate_405_(California)
    Interstate 405 (California) - Wikipedia
    Length72.15 mi (116.11 km)
    Existed1964–present
    NHSEntire route
    Major intersectionsSR 133 in Irvine · SR 55 / SR 73 in Costa Mesa · I-605 / SR 22 in Seal Beach · I-710 in Long Beach · I-110 in Carson · I-105 near LAX · I-10 in West Los Angeles · SR 2 in Westwood · US 101 in Sherman Oaks · SR 118 in Mission Hills
    Driving from Irvine to Los Angeles, I-405 & I-110 (uncut footage).
    45:21
    Driving from Irvine to Los Angeles, I-405 & I-110 (uncut footage).
    YouTubeauksmann63.9K viewsMay 19, 2022
    Route description

    The entirety of I-405 is designated as Route 405 in the state highway system. It is defined as follows in the California Streets and Highways Code's section 615, subdivision (a):
    Route 405 i… See more

    Express lanes

    High-occupancy toll (HOT) lanes along I-405 between SR 73 in Costa Mesa and I-605 in Seal Beach opened on December 1, 2023. This was part of the I-405 Improvement Project that started constructio… See more

    Traffic congestion

    The freeway is one of the busiest freeways in the nation and is the busiest freeway in California. The freeway's congestion problems have led to jokes that the road was numbered 405 because traffic moves at "four or fi… See more

    History

    I-405 was approved as a chargeable Interstate (in other words, an Interstate financed with federal funds) in 1955. The Division of Highways originally requested I-9 for the corridor, while the Santa Ana Freeway w… See more

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