Trains wait to enter the subway at Church and Duboce streets Tuesday morning. (Michael Barba/S.F. Examiner)

Mechanical problem backs up Muni subway service during morning rush hour

A crossover switch issue at the Castro MUNI station delayed subway service in both directions Tuesday morning, according to the San Francisco Municipal Transportation Agency.

Bus shuttle service support was requested to operate between West Portal and Van Ness stations this morning after the switch issue was reported around 8:40 a.m., as Muni riders took to twitter to report substantial delays in service for the K-Ingleside, L-Taraval, and M-Oceanview lines.

Select trains were also rerouted out of the subway by way of the Ferry and Duboce Portals “to reduce subway congestions while the switch issue is being worked on,” according to SFMTA spokesperson Erica Kato.

In a 9:17 a.m. update, the agency tweeted that trains were able to proceed through the Castro Station in “manual mode,” but warned riders that heavy congestion would persist until the switch issue is resolved.

The problem was reported to be “fully resolved” shortly before 10 a.m.

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