As a German who lives not so far from Berlin, I can tell you that things are really bad there and the initiative is more a reaction to the situation than part of a movement. Since the last state election, Berlin has pretty much the most car-friendly government in the republic, even by German standards - every possible cent that could even be considered for a cycle path is being stopped there. The situation is nothing short of catastrophic.

Nonetheless, the success of the initiative is of course to be sincerely wished.