For many American cities, 2009 marks the second time around for car-free events modeled after Bogotá’s Ciclovía. In San Francisco, like New York, last year’s innovation is this year’s tradition, as you’ll see in this Streetfilm from John Hamilton:

Despite a blanket of fog, the last San Francisco Sunday Streets of 2009
was, from all accounts, a smashing success, one of the most popular so
far, with thousands of people enjoying four activity-filled hours of
pristine car-free space through Golden Gate Park and the Great Highway.
Kids, families, bicyclists, skaters, dancers, and even the MTA Chief
Nat Ford came out to enjoy the car-free zone.

Don’t miss the Fun Cycle, also known as the Conference Bike, which is like an all-ages version of the beer bike.