Presentation for the Systems, Cities and Sustainable Mobility Summit , Arts Center Pasadena, 5 th - 7 th February, 2008. http://www.artcenter.edu/summit This and related research can be downloaded from http://www.janchipchase.com/publications. Thanks to the extended research teams who helped make all of this happen. Photo: Morning commuters. Jan Chipchase. Ho Chi Minh City, Vietnam, 2006.