1937: Following three days of unprecedented festivities, Los Angeles Union Passenger Terminal — now known as Los Angeles Union Station — is formally dedicated and opened.
The fascinating story of the citywide fight for a Union Station is explained in full in this Primary Resources blog post.
An extensive, detailed overview of the opening, the building, and its architecture can be found in the June, 1939 issue of Pacific Electric Magazine.
1960: Los Angeles Metropolitan Transit Authority establishes Freeway Flyer Service on Line 93 which serves the Central and West Central San Fernando Valley via the Hollywood Freeway.
More information can be found in the June, 1960 issue of The Emblem, the Los Angeles Metropolitan Transit Authority employee news magazine.