The latter was partially constructed and opened by Horace Dobbins, who incorporated the California Cycleway Company and bought a six-mile (10 km) right-of-way from downtown Pasadena to Avenue 54 in Highland Park, Los Angeles.
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Though the common name used by the public had become "Arroyo Seco Freeway" over the years, it was officially a "Parkway" until November 16, 1954, when the California Highway Commission changed its name to the Pasadena Freeway.
Gloria Macapagal-Arroyo | Saw Mill River Parkway | Arroyo Seco | Long Island Motor Parkway | Blue Ridge Parkway | Garden State Parkway | Parkway Drive | Didcot Parkway railway station | Taconic State Parkway | Northern State Parkway | Merritt Parkway | Martina Arroyo | Hutchinson River Parkway | Wantagh State Parkway | Utopia Parkway | Parkway | parkway | Bronson Arroyo | Benjamin Franklin Parkway | Aylesbury Vale Parkway railway station | Arroyo | William H. Natcher Parkway | Victory Memorial Parkway | The Freeman Parkway Bridge, Toney's Brook | Sligo Creek Parkway | Sir John A. Macdonald Parkway | Parkway Parade | Palisades Interstate Parkway | M3 Parkway railway station | Liverpool South Parkway railway station |
Early plans also included a north–south freeway on each side of the Los Angeles Central Business District, splitting at the merge of the Harbor Parkway (Harbor Freeway) and Venice Parkway northeast of the University of Southern California, and rejoining at the split between the Arroyo Seco Parkway (Pasadena Freeway) and Riverside Parkway south of Dodger Stadium.
Connections were added in 1937 to the Figueroa Street Viaduct, 1940 to the Arroyo Seco Parkway (known until 2010 as the Pasadena Freeway), and 1953 to the Four Level Interchange.