New modes of mobility, competition for open space and overlapping, conflicting usage demands, changing commerce patterns and its related spatial effects, the urgent need for adaptation to the climate crisis and digitalization shape our present day usage and availability of public space – and will increasingly do so in the future. The public space is the forum for social negotiation processes. It is where the decisive markers are laid down for the necessary mobility transition and the accomplishment of the related climate targets in the traffic sector. The project trans|formator:in provides innovative impulses in order to both (re)transform predominantly car- oriented street spaces into attractive public spaces accessible to all and to initiate the respective, essential processes of discussion, participation and learning. Closely linked to this are required behavioral changes in society to active modes of mobility. trans|formator:in initiates the transformation of public spaces in seven pilots, grouped into three pilot groups, which are each shaped by their respective context and challenges, but united in common typologies. The pilot groups are (1) cross-linkage of multimodal hubs and public spaces, (2) axes of active mobility and (3) urban hotspots. The transformation in the pilots is assisted by the development of transferable tool boxes that are adaptable to the local context and implementation paths. The tool boxes include thematically sorted toolkits concerning strategic and tactical processes of planning and participation; solutionapproaches (including methods, tools, technolgoies, etc.) of integrated planning; juridical and political- administrative frameworks but also obstructing system conditions that block successful implementations. The tool boxes are made available to the pilots and follower regions (so-called lead-follower and follower) in order to ensure an efficient but adaptable transformation process The combination of technological (e.g. curb side management), social (e.g. co-production) and organizational (e.g. peer-to-peer learning) innovations supports putting the transport policy strategy of avoiding, shifting and improving into practice. The central, innovative aspect of trans|formator:in is the embedding of the physical transformation in a comprehensive and multi-layered concept of information, communication, participation and learning (e.g. triple-loop learning strategy) for local politics, the planning administration, companies and civil society. Going beyond the physical transformation and it’s situational acceptance to strengthen the overall aim of mobility transition, the mobility behavior itself must become more sustainable even beyond transformed areas. As an essential part of the process specific evaluation and scalability criteria are determined in order to elaborate and disseminate favorable framework conditions, innovative solution approaches, and creative process trajectories for a transformation of traffic spaces into public spaces. The combined approach of the provision of generic toolboxes, applied on site in the seven pilots verifies and enables the transfer and the scalability of the, still to be developed, innovation solutions and processes to cities and municipalities shaped by comparable conditions.