“…This reflects the reality that both decentralisation and concentration processes are at work in the city (Bertolini, 1999), some business and residences are decentralising, while others remain in centres of Australian cities. The most widely agreed solution for sustainable transport outcomes in cities appears to be one of multiple nodes of concentrated activity, a transition from a 'Uniplex City', with one central core of activities surrounded by suburbs, to a 'Multiplex City', with several centres connected both physically and by telecommunications (Srinivasan, 2002: Sorenson, 2001Lloyd Jones et al, 2001;Filion, 2001;Healey, 2000;Newton, 2000;Frey, 1999;Brotchie, 1992;Newman, 1992Newman, , 1996Van der Valk and Faludi, 1992;Kumar, 1990;Van Til, 1979). …”