Bicycles flood Budapest at Critical Mass Earth Day Two bicyclists who attend the Critical Mass Earth Day bicycle ride lift a girl with her...

Bicycles flood Budapest at Critical Mass Earth Day

Two bicyclists who attend the Critical Mass Earth Day bicycle ride lift a girl with her bike in Budapest, capital of Hungary, on April 22, 2012. (Xinhua/Attila Volgyi)

Bicyclists, who attend the Critical Mass Earth Day bicycle ride, ride cross Elisabeth Bridge across the River Danube in Budapest, capital of Hungary, on April 22, 2012. (Xinhua/Attila Volgyi)

Bicyclists, who attend the Critical Mass Earth Day bicycle ride, ride cross Elisabeth Bridge across the River Danube in Budapest, capital of Hungary, on April 22, 2012.(Xinhua/Attila Volgyi)

Bicyclists who attend the Critical Mass Earth Day bicycle ride lift their bikes in Budapest, capital of Hungary, on April 22, 2012. (Xinhua/Attila Volgyi)

Bicyclists who attend the Critical Mass Earth Day bicycle ride lift their bikes in Budapest, capital of Hungary, on April 22, 2012. (Xinhua/Attila Volgyi)

Bicycles flooded Budapest's streets on April 22, 2012 at the Critical Mass Earth Day. Critical Mass Hungary organizes bicycle rides twice a year to demonstrate the importance and popularity of bicycle as a solution of everyday city transportation.