Big Events like Olympic Games (Beijing 2008)and World Expositon (Shanghai 2010) require a huge organization dealing with security of persons,on site orientation
The Twin Cities of Chongqing and Toulouse(France)collaborate since a long time(1981) together in a wide variety of domains from cultural and economical affairs
Introduction Large cities will depend more and more in the future on the quality of
their public transport.The development of urban areas has been accelerated i