Methods for the transferability of know-how, best practices and technologies across transport modes constitute an advantage for the mobility ecosystem. Transferability is an added value for practical and efficient solution design, development and implementation, as well as for solution scaling up to other transport modes. However, transferability methods oftentimes lack systematic planning and consideration for stakeholders’ and users’ needs and requirements. For that reason, the present contribution offers a User-centred transferability validation methodology to assess the transferability impact of solutions, best practices, lessons learnt, and technologies across transport modes. The following methodology is the outcome of a process (ongoing) carried out in several European projects, showing promising results for cross-modal transferability between Aviation, Road, and Maritime modes. The contribution presents the User-centred transferability validation methodology rationale that led to its design, the methodological implications for its use, the results obtained in the course of its application, and the lessons learnt and future research directions for the methodology.