Critical Mass bike rides take place monthly in cities around the world. They are free mass participatory events, with no leaders or fixed agendas. However, the broad aim is to celebrate cycling and sustainable transport, and to give cyclists safety in numbers.
"aliens against autoholism! - Critical Masrs flies again!" in Vienna
About 390 Aliens participated in Vienna's Critical Mass this month. Thus the Alien CM has been the biggest ride in Vienna up to now. Read more on the Vienna Critical Mass website (German).
Riga Critical Mass in the media, seven people were arrested in the ride on April 25, 2008. See also the Wikipedia article Critical Mass and [1].
Today on Sunday: Budapest Critical Mass with many thousands of riders will be held, see also Budapest Times. Update (April 21): About up to 80,000 riders participated in the ride. See also [2] (including a great photo).
April 18, 2008
Background report on Cafebabel.com (European magazine): Bike traffic: return of the scorchers by Christina Peters (Translation from Kate Hollinshead; original article in German: [3])
March 19, 2008
Maybe a very early predecessor of Critical Mass: "The Great San Francisco bicycle protest of 1896." Read the article on Processed World: [4] (PDF). A short overview can be found here: [5].