Although it is frequent, discontinuous (leapfrog) development has rarely been addressed by the literature, because traditional models are unable to conceive diverse urban forms. This article is a survey of theoretical explanations of discontinuous development. It follows two parts. First, taking...

The question of the urban form-daily mobility interaction was recently renewed. The model of the Compact City aims at increasing densities to decrease the use of the automobile. However, the density-mobility interaction is questioned in the polycentric city : on one’s hand, suburban employment...