PCC streetcar
Cars on the K, L, and M lines began using temporary trackage on 17th Street on December 2, 1972, though the ramps were not completed until 1973. After eight years of construction, Castro station opened slightly to the east in 1980 when Muni Metro service was inaugurated on the three Twin Peaks Tunnel lines. The ramps remained in regular service on weekends until September 19, 1982, when the last PCC streetcar service was discontinued.