Park station and Church and Duboce station, while K Ingleside and L Taraval service was interlined, running between Wawona and 46th Avenue station and Balboa Park station. It returned to bus substitution three days later, citing malfunctioning overhead wire splices and the need to quarantine control center staff after a COVID-19 case. Rail service resumed in stages between December 2020 and February 2022. The T Third Street began using the subway between Ferry Portal and Embarcadero on January 23, 2021; full N, KT, and S service resumed on May 15, followed by the M on August 14. J Church trains, which had resumed surface-only operation on December 19, 2020, returned to the subway on February 19, 2022. The L Taraval remains as a bus to allow for construction along Taraval Street until 2024. BART headways are short through this segment, as the right of way carries four of the system's five rapid transit lines on just two tracks. Upon completion, the Central Subway will be connected to the Market Street subway via a pedestrian underpass running from the existing Powell Street station to the under-construction Union Square/Market Street station a block away. The T will be rerouted from the Market Street subway into the new Central Subway. Stations in the Market Street subway There are a total of seven stations in the tunnel. Four are used by BART; all seven are used by the Muni Metro lines that had previously run on the surface of Market Street. The J Church and N Judah exit the tunnel at the Duboce portal and thus does not serve the Castro Street and Church Street (subway) stations; J trains stop at surface-level platforms on Church Street. Stations are listed from northeast to southwest: References External links Bay Area Rapid Transit Muni Metro Market Street (San Francisco) Railroad tunnels in California Tunnels in San Francisco San Francisco Municipal Railway