Abstract
The fragmentation of the urban patterns is actually a largely discussed topic in urban planning. In particular the consumption of space and the traffic flows generated are considered as most negative impacts of this development. However, for many reasons it doesn’t seem possible to find simple solutions to manage this evolution. The mobility has changed the way of life of the agents and the experience shows that planning concepts, which don’t tend to take into account such desires, risk to fail. In the present paper we focus on the question if alternative geometric concepts, based on fractal geometry, provide an instrument to reflect about spatial patterns which allow to respect simultaneously different desires of agents. In a first part we tackle with different concepts of urbanism under sociological and spatial aspects. Then the use of fractal geometry in such a conceptual context is considered, taking into account the aspect of the accessibility of different functions and different approaches are discussed which allow to measure the quality of accessibility of transportation networks.