Abstract: This paper discusses sustainability in relation to transport within cities and outlines some practical methods for enabling this to happen. Greater transparency and integration of process from the community and government vision of a city through to the development and operation of the infrastructure that supports it is the key. The enabling of sustainability performance through transport requires two challenges to be met. The first of these is the meaningful engagement of the community in the selection of urban form and transport system options. A sustainability framework has been developed providing the context needed for the supporting methodologies. The second of these challenges is the enabling of the sustainability performance choice at the macro scale phase to flow through to the physical reality of the system. Systems engineering is cast as a practical methodology for enabling the sustainability performance expectations to traverse the complexities through to the physical performance.