An increasing attention is being paid by scholars in the field of mobilities studies and beyond to environmental challenges, in the context of worsening environmental crises and political injunction to environmental transition of mobilities. In this chapter, by undertaking an analysis of both English-speaking and French-speaking literature, we show the salience of transgressing the dominant segmentation of mobilities between studies focusing on practices and those investigating policies in order to better understand the assemblage of (un)changing spatialities at stake. This critical investigation of what such the environmental transition of mobilities is supposed to entail shows various ways by which the conceptual tensions between the multilevel perspective and the social practice theory can be used to deconstruct further existing ways of thinking mobilities and point out key topics on which more academic investigation and public action are urgently needed.