TreuMoDa (TMD) will be designed as an independent and non-profit interface that will enable data from the field of mobility to be made available and used by science, industry and society in accordance with transparent criteria and in compliance with data protection regulations. It will be a building block for strengthening science and innovation by opening up the use, the merging of distributed inventories and the broad subsequent use of data. This is not about the function of a data marketplace, but about instruments, clarifying and fulfilling legal and technical requirements. The aim of the project is to develop a concept of a TMD ready for application and to test it exemplarily in the most important aspects. The activity profile of the TMD will be designed in a modular way in order to allow a simplified and broad use of the concept depending on the concrete requirements on the one hand and to be able to take up the national and international regulatory initiatives still under discussion on the other hand.