This is the battle cry of the city of Vienna, Austria, where gates to control traffic flow have been placed in the major roads leading into the city. Once the vehicles in the city reach a certain number, the gates are closed.
這是奧地利維也納市民的心願。城門，指的是在主要外環放射道路上，設置控制車流的柵欄，進入市區的車到一定數量，就不再放行。