ABC7 News spoke to San Francisco Sheriff Paul Miyamoto and Caltrans spokesperson Bart Ney on how this was able to happen and if authorities were caught off guard.
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VIDEO: Dozens of protesters arrested after abandoning cars, blocking westbound Bay Bridge, CHP says
Protesters arrested after abandoning cars, blocking all WB lanes of Bay Bridge, CHP says
"It wasn't that we were caught off guard, we just anticipated ahead of time that there would be large-scale disruptions at some point in our city and county," Sheriff Miyamoto said.
He went on to commend CHP's response to the protest saying officers were immediately on scene but traffic was snarled for hours as authorities worked to detain demonstrators.
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In total, 81 protesters were arrested and 29 vehicles were towed after demonstrators blocked all lanes on the upper deck, with some drivers tossing their keys into the bay. Sheriff Miyamoto said one person was booked into county jail but the others were cited and released.