While emphasizing that the agency faces significant financial uncertainties, the SFMTA presentation said layoffs could range from 989 to 1,226 full-time workers in fiscal 2021-22, or about 18% to 22% of the agency workforce.
The agency added that the cuts are certain to affect operations, which besides the Muni transit service, include running the city's parking program, overseeing the city's taxi industry and rental bicycle and scooter programs, transportation planning and street safety initiatives.
Exactly what programs would be cut and how many employees would be affected in each part of the agency isn't yet known.
The SFMTA has already slashed Muni service by 30%. It has suspended runs on routes with relatively low ridership and refocused service on routes it has identified as particularly important to the city's transit-dependent essential workforce. Runs have been added to heavily used lines such as the 8-Bayshore, 9-San Bruno, 14-Mission and 38-Geary.
Tumlin said layoffs could damage service in both the short and long term.
"Our buses are full," Tumlin said. "We're having to turn away hundreds of essential workers every day, and having to do another 20% service cut on top of the 30% service cuts we've already done, that is completely devastating to everything we're trying to do as an agency."
The impact of layoffs and further service reductions could last well into the future, he added.
The cuts could mean "there's no path for downtown San Francisco to return as a major employment center. There can't be recovery of urban economies without transit," he said.
'Dire and Gloomy and Scary'
Roger Marenco, president of Transport Workers Union Local 250-A, which represents about 2,000 Muni operators, said Monday he hoped to work with agency management to reduce the scope of the cuts.
"The situation looks and sounds dire and gloomy and scary," Marenco said. He said Local 250-A is formulating a plan "that involves 10 or 12 steps so as to avoid layoffs or deter layoffs to a later date."
Those steps would include hiring no new bus operators "for the next six, eight, 10, 12 months," a measure designed to keep current drivers employed.
"That's No. 1," Marenco said. "No. 2 would be beefing up parking citations. ... We all hate parking citations, that's a fact. But on the flip side it is one of the larger sources of funding for the agency."