A spontaneous radical grassroots direct action approach to resisting car culture, originally born in San Francisco in 1992, now takes over 100 cities worldwide with no leaders, no controllers, no central organisation, no set political ideology, and not even a set route for the ride! A mobile temporary autonomous zone open to everyone and anyone, it’s not even necessary to have a bike – skateboards, roller blades and wheelchairs are also part of it. There are hundreds of cities with thousands of people taking part every month.

The emphasis is on having fun, but Critical Mass has raised awareness of the negative effects of car culture, highlighted urban cycling, advocated alternatives to fossil-fuel-driven transport and has managed to put alternative transport issues on the political agenda.

This Friday’s 10th birthday Mass should take on a party atmosphere, with a call for people to bring music and food and drink. And this Thursday Indymedia cinema will be screening films about Critical Mass at The Other Cinema.

London Cycling Campaign | Croydon branch of the London Cycling Campaign | Hackney branch of the London Cycling Campaign | Critical Masses around the world | Global CM listing and resource | Projects to encourage people to walk, cycle and use public transport