Book excerpt: Originally published in 1981, Urban Transport Planning explains how the systems approach has been applied in the planning of multi-modal transport planning and to demonstrate how a city may be represented by land use zones superimposed with a transport network. It discusses theoretical developments and demonstrates their application to practical problems of planning by using actual case studies. By treating the urban area as a system, and recognising the fundamental interactions between land use, traffic and transport, the study shows how it is possible to predict the future demands for travel, how transport requirements are determined and how alternative plans are formulated and evaluated.