WeCount aims to empower citizens to take a leading role in the production of data, evidence and knowledge around mobility in their own neighborhoods, and at street level. The project will follow 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 in 5 pilots in Madrid, Ljubljana, Dublin, Cardiff and Leuven. Following this approach, we will be able to quantify local road transport (cars, Heavy Goods 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. Moreover, the project will provide cost-effective data for local authorities, at a far greater temporal and spatial scale than what would be possible in classic traffic counting campaigns, thereby opening up new opportunities for transportation policy making and research. In WeCount, we empower citizens to develop evidence-led interventions into the political discourse on civic and environmental issues. By putting citizens at the heart of the innovation process, the project seeks to overcome existing technological and societal silos so that citizens can champion a new perspective on road transport that take into account their own concerns in pursuit of better quality of life and more equitable, healthy futures.