There are hundreds of miles of bike lanes in San Francisco, making it one of the most bike friendly cities in America. But that wasn't the case until the 90s. The transformation was due, in large part, to two groups working without coordination: The San Francisco Bicycle Coalition – an advocacy organization, and Critical Mass – the name of a regular group bike ride. This week, reporter Azul Dahlstrom-Eckman tells the story of how these two groups changed the way people cycle in San Francisco, whether the city liked it or not.

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This story was reported by Azul Dahlstrom-Eckman. Bay Curious is made by Olivia Allen-Price, Amanda Font and Brendan Willard. Special thanks to Scott Shafer, Paul Lancour and Dan Brekke for their help with this story, and to Ted White who shared archival audio from his documentaries “We Are Traffic” and “Return of the Scorcher.”

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