Fabien LEURENT, professor of Ecole des Ponts ParisTech, is senior researcher at the City Mobility Transport Laboratory (LVMT). His research interest include the systems analysis of transportation modes and services (road networks, car-based modes including shared services, transit networks), the mathematical modeling of systems of supply and demand taking place in a territory, their technical-economic analysis and the statistical estimation of mobility behaviors and spatial patterns on the basis of diverse data sources. He leads the ENPC-IDFM Chair on Urban Mobility and has served for 10 years as ENPC pilot of the ParisTech-Vinci Chair on the Ecodesign of buildings and infrastructure.