Among the elements that make a town function, the transport system is essential; it comprises the infrastructure for private conveyance as well as the infrastructure and services of public transport. If the transport system is inadequate the spatial organisation does not function as expected: traffic facilities may be under-utilised in one place and unable to satisfy requirements elsewhere. The only way to avoid such a state of affairs is to integrate (simultaneously and in mutual consideration) planning of the spatial organisation and the transport system.