This paper investigates the relation between sustainability and urban form. To this aim a system of Land-Use and Transport
Interactions (LUTI) models has been designed and applied to the metropolitan area of Rome, to understand the interdependence
of key variables such as travel behavior, transport supply, property values, jobs and residential location. The models represent the
behavior of both dwellers and transport users and how they react to changing conditions. A system of assessment indicators has
been defined to systematically test and compare alternative scenarios of urban form and to evaluate to what extent different
locations and density distributions of activities achieve sustainability in terms of transport performances, social and
environmental impacts
