mrs. cluskin, the leader to save the cable cars. arguing that the cable cars were a symbol of the city and she entered a charter placed on the november ballot. it passed overwhelmly. the california street cable railway was purchased by the city in 1952. there were cut backs on the cable car system and in 1957 only three lines would remain. the three lines that exist today. in 1964 the cable car's future as part of california's transit system was sealed when it was proclaimed a national historic landmark. in february 1980, muni metro were officially inaugurated. in that same year muni received its first fleet of buses equipped with wheelchair lifts. in 1982 when the cable car had a shut-down, they added an alternative attraction to the cars. the festival was a huge hit and would continue for the next four summers in a permanent f-line that would extend all the way to fisherman's wharf, by 2000 the f-line was in place. and in 2007 muni extended the third line to the southeast corner and returning to third street. for the first time in