When the lines reopen in August, one-car trains will no longer enter the subway.

But he’s also operating under intense pressure from COVID-19, a fickle public and the stop-start uncertainty of the economy. San Francisco Municipal Transportation Agency chief Jeffrey Tumlin hopes this leaner model will make the system more reliable. 22 after an unprecedented five-month shutdown, it will have modified rail routes and fewer trains running in the tunnels each hour. In San Francisco, a city where it’s difficult to move a bus stop without causing an uprising, the head of transportation has taken on a much greater challenge: He wants to reinvent the subway. Jessica Christian / The Chronicle Show More Show Less Anderson decided to start wearing the face mask due to the growing threat of the novel coronavirus and his job that places him in close proximity to various transit riders. Paul Chinn / The Chronicle Show More Show Less 6 of6 SFMTA operator Jacques Anderson sports a face mask while exiting his train at the Embarcadero Muni platform in San Francisco, Calif. The SFMTA reopened the Twin Peaks tunnel to light rail service Saturday following a two-month closure for an extensive restoration project. Carlos Avila Gonzalez / The Chronicle 2019 Show More Show Less 5 of6 Inbound and outbound Muni Metro light rail trains stop at the West Portal station in San Francisco, Calif. Santiago Mejia / The Chronicle Show More Show Less 4 of6 New San Francisco Municipal Transportation Agency director Jeffrey Tumlin in San Francisco, Calif., on Tuesday, November 11/12/19, 2019. The measures include fewer runs, but longer trains in an attempt for physical distancing between passengers. According to the SFMTA, none of the Muni Metro lines are being eliminated and the changes are temporary emergency measures in response to the coronavirus pandemic. Muni is reopening its Muni Metro Light Rail in August. Santiago Mejia / The Chronicle Show More Show Less 3 of6 The L-Taraval Muni bus line (left) drives past the West Portal Station as the M-Ocean View bus picks up passengers outside the station on Friday, July 24, 2020, in San Francisco, Calif. Santiago Mejia / The Chronicle Show More Show Less 2 of6 A person waits for the M-Ocean View bus line outside West Portal Station on Friday, July 24, 2020, in San Francisco, Calif. 1 of6 Muni Metro Light Rail that�s not in service departs the West Portal Station on Friday, July 24, 2020, in San Francisco, Calif.

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