State Route 1 also enters San Francisco from the north via the Golden Gate Bridge , but turns south away from the routing of U.S. 101 , first onto Park Presidio Blvd through Golden Gate Park , and then bisecting the west side of the city as the 19th Avenue arterial thoroughfare , joining with Interstate 280 at the city 's southern border . Interstate 280 continues south from San Francisco . Interstate 280 also turns to the east along the southern edge of the city , terminating just south of the Bay Bridge in the South of Market neighborhood . After the 1989 Loma Prieta earthquake , city leaders decided to demolish the Embarcadero Freeway , and a portion of the Central Freeway , converting them into street-level boulevards
1989 Loma Prieta earthquake
1989 Loma Prieta earthquake
Transportation in the San Francisco Bay Area