Claude, Viviane <br/><br/>
Front matter 

 -  2025.<br/>							 
<br/><br/> 42 
<br/><br/> Residential and mobility trajectories have been analysed in research, and links between these two concepts have been identified in order to understand the choices people make. This article extends these reflections to investigate whether residential trajectories can explain the propagation of the use of a travel mode. The aim is to find out whether residential trajectories support the spread of cycling in the Île-de-France region. This research, based on the study of semi-directive interviews carried out in 2018 and 2019 which explored the residential trajectories and bicycle use of people living in Paris’s inner suburbs, shows that centrifugal residential dynamics contribute to the development of cycling according to this same trend. The development of bicycle use from the centre to the periphery of the Paris metropolitan area can be explained in particular by the import of travel practices as well as by the spread of citizen mobilisation.