The European Mobility domain is very rich but highly fragmented. Gaia-X has set the goal of making mobility data more available to improve the capacity to circulate better for each individual citizen on the European territory and to support the development of new businesses thanks to better access to data. Privacy of personal data is to be ensured, such that citizens stay in control entirely. The Gaia-X framework enables mobility data spaces that are sovereign and federated and that can be deployed with trust and at scale. These data spaces integrate existing data initiatives in a federated structure and invite new initiatives to join the federation, to enhance the mobility experience for travellers (short and long distance) and, reduce costs, for example, linked to traffic disruption.