[Update: 2:27pm] According to the Department of Emergency Management, "a majority of affected traffic lights have been returned to normal operations."
A majority of affected traffic lights have been restored to normal operations. No further updates will be sent.— San Francisco DEM (@SF_emergency) February 20, 2018
Traffic lights throughout San Francisco are malfunctioning, according to the city’s Department of Emergency Management (DEM).
The agency reports that signals are out in SoMa between 6th and Mission and 13th and Market, and on Folsom and 6th to Folsom and Hawthorn streets.
Police are directing traffic in some busy areas, but officials are asking the public to treat the intersections as 4-way stops until lights are functioning normally.
We'll update this story as more information is available. In the meantime, please share any known locations of malfunctioning traffic lights in the comments.