"This contribution describes the transdisciplinary research completed between 2005 and 2007 by an international team about the interrelations between spatial representations and daily mobility in urban areas. This research articulated geographical, psychological and sociological approaches that have already been applied to study daily mobility. However these disciplinary contributions have rarely been intersected using an interdisciplinary framework. The presentation begins with published definitions and applications of transdisciplinarity by the author. Then it considers the theoretical issues stemming from the legitimate discourse of each disciplinary analysis of some specific dimensions of each subject that has been studied. The presentation also considers how these theoretical articulations led to the reformulation of the initial research hypothesis about the links between spatial representations and daily mobility. Finally an example of interrelations between the cognitive, geographical and sociological dimensions of daily mobility will be presented. This example illustrates the hypothesis of the ""identity of movement"" which is one indicator of social identities"