San Francisco’s Muni Metro Subway was designed to accommodate four and five car trains. Since the 1997 introduction of new BREDA LRVs and the Automated Train Control System (ATCS), the Muni and now the SFMTA have refused to operate with more than two car trains, thereby reducing the carrying capacity of the subway and adjoining Twin Peaks and Sunset Tunnels to less than half their design capacity.
To be able to form at least three and four car trains the MTA would need to restore its previous ability to couple trains together at the West and Duboce portals. It was anticipated that with the incoming Siemen’s LRVs this essential capability would be possible. Last Fall BATWG, Save Muni and others began asking the MTA whether or not the new Siemens couplers had this capability. However, since the arrival and testing of 68 new Siemen’s LRVs, no attempt has been made to either answer our questions or demonstrate this capability.