Transportation and communications networks are tremendously important for location, economic efficiency, mobility and welfare. At the same time there is a growing consensus about the negative environmental impacts of transport. A strategy for sustainable spatial systems is one of the most urgent urban planning issues today. This necessitates a comprehensive understanding of the complexities of spatial systems, including how land-use, transport and the environment interact and are influenced by different policies and actions. This book aims at improving this understanding. Leading scholars in social and engineering sciences review facts, trends, issues, policies and models relevant for integrated land-+use/ transport/environment analysis and present recent methodological advances in dynamic network modelling, spatial equilibrium modelling, urban land-use/ transportation modelling and regional development analysis. It also covers results from evaluations of landuse and transport policies.