Muni Metro subway service returns on Saturday, but still faces a long road to full recovery FacebookTwitterEmail 1of2 A Muni T-Third Street train passes another train going the opposite direction on Third Street in San Francisco.Stephen Lam/The ChronicleShow MoreShow Less 2of2 Passengers wait for the Muni T-Third Street train at Embarcadero Station in San Francisco.Stephen Lam/The ChronicleShow MoreShow Less On a recent weekday morning, a T-Third Muni Metro train offloaded its masked riders at downtown San Francisco’s Embarcadero Station, where they rode up the escalators to Market Street for work or to connect to other transit lines.