The Embarcadero Freeway , which had only been constructed from Broadway along the Embarcadero to the Bay Bridge , was demolished after the 1989 Loma Prieta earthquake , and Doyle Drive is now part of U.S. Route 101 . SR 480 was '' ' Interstate 480 ' '' , an auxiliary route of the Interstate Highway System , from 1955 to 1965 . The entire route was removed in 1991 , approximately two years after the earthquake
1989 Loma Prieta earthquake
1989 Loma Prieta earthquake
California State Route 480