On Friday, December 25th , the monthly Critical Mass Bicycle Ride will leave from Justin Herman Plaza sometime between 6:15 PM and 6:30 PM. The number of participants and the route are unknown. Motorists may be delayed by the bicycle ride. Roads will re-open as soon as the bicyclists have passed.

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Traffic functions are provided by the Sustainable Streets Division of the San Francisco Municipal Transportation Agency (SFMTA). Copyright © 2000-2010 SFMTA. All rights reserved. Updated February 25, 2010