Artist’s impression of a car-less Berlin city centre, in this case Alte Schönhauser Strasse - Tom Meiser/Timo Schmid A campaign to curb car use in the centre of Berlin has been met with outrage across the political spectrum in Germany. The “traffic referendum” citizens’ initiative wants to limit car use within the city’s S-Bahn ring, a 34 square mile area equivalent to London Underground’s zone 1 and zone 2. Citizens would have to apply online for a maximum of 12 trips per year in the area.