The un Mao building in Shanghai downtown, which is 420 metres high, is the tallest buildin in China. It has 88 storeys consisting of corporate offices, a five star hotel from the 53r to the 87th floor, a rooftop restaurant and a sightseeing deck for tourists.More than 600 cars use the underground car park on any working day.A long range RFID system recognizes vehicles while they are approaching and opens the gates. Hence rush hour traffic snarls get avoided and security is also assured. Similar vehicular access control will be implemented at most of the new buildings coming up in the major metropolitan cities.