This report summarises the full Summative Evaluation Report of WeCount, available here: https://zenodo.org/record/6337258#.YicxZ-jP1PY WeCount was a citizen science project working across five case studies in Europe to empower citizens to take a leading role in the production of data, evidence and knowledge around mobility in their own neighbourhoods, and at the street level. The project followed participatory citizen science methods to co-create and use innovative low cost, automated, road traffic counting sensors (i.e., Telraam) and multi-stakeholder engagement mechanisms across five case studies. Citizen scientists in the five case studies were involved in collecting the data, analysing it and engage with key stakeholders throughout the process. WeCount aimed at quantifying local road transport (cars, large vehicles, active travel modes and speed), produce scientific knowledge in the field of mobility and environmental pollution, and co- design informed solutions to tackle a variety of road transport challenges. The case studies followed a similar execution pathway, Leuven & Madrid deploying first and serving as pilots for the remaining three case studies. This report evaluates the impact the project had on the citizens and policy makers involved in the project, with important lessons for the research community on how to engage diverse stakeholders and support self-sustaining networks of citizens, capable of influencing the local decision making process for sustainable urban mobility.