ABSTRACT
This chapter presents the main results of a research programme that looked at the impact of specific polycentric urban forms on commuting patterns and intraurban segregation. Our results highlight three different models; Lyon presents an extended monocentrism, with visible and diffuse inequalities; Marseille is characterized by a consuming duocentrism that is doubly unequal in social terms; in Lille, we highlight a polycentrism that is parsimonious with regard to individual motorized travel but that is socially excluding. Further research will test the relevance of these models on other European cities with over a million inhabitants.
