The ELABORATOR project aims to support cities across Europe in their transition to climate neutrality by promoting the implementation of mobility interventions towards inclusive, sustainable, safe and affordable mobility. The project aims to provide tools and methods to support a truly collaborative and participatory approach in achieving inclusive transport infrastructure development in 12 cities in Europe. The deliverable of T2.3, the ELABORATOR Co-creation playbook provides practical guidelines to engage groups of stakeholders and citizens in the development of qualitative data collection methods, comprising community-based and citizensscience research to ensure that the final methods and tools have legitimacy for all the parties involved in new and innovative urban interventions’ design and deployment. The playbook provides a solid foundation for the cities to work with co-creation methodologies to support the involvement of stakeholders and citizens, especially focusing on the inclusion of VRUs in co-creation processes. Hopefully these guidelines will also prove fruitful for other cities working with collaborative methods.