Mobilities are an essential issue in contemporary societies, which have recently been reexamined as a result of calls for ecological transition, on the one hand, and the impact of the global Covid 19 pandemic, on the other. The original contribution of this book is that it starts from the polysemic meaning of mobility, paying attention to different scales of perception and action, the lived spaces in which mobility occurs, and the “alternative” character of so-called sustainable mobilities and the actors who display or engage in such practices. The concept of mobilities is thus considered in relation to urban spaces and sustainability, based on the analysis of French case studies from a European perspective and using multidisciplinary social sciences approaches.