A massive power outage Saturday darkened 130,000 homes and businesses in San Francisco, according to the city’s main utility firm, Pacific Gas and Electric (PG&E).

Self-driving cars stalled in streets and blocked access points across the metropolis as just part of the stoppage. The autonomous vehicles were reportedly unable to detect down traffic lights, triggering traffic jams across affected areas.

The power failure left a large swath of the northern part of the city in the dark, beginning with the Richmond and Presidio neighborhoods and areas around Golden Gate Park in the early afternoon before growing in scope and size, the Independent…

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