How do we define a healthy built environment? What are appropriate indicators of a healthy city? How to assess the impact of urban design and policy on health? Which measures are effective to stimulate public health (e.g. replacing motorized transport by walking and cycling)? How can smart ICT systems and dashboards help us to achieve a healthy built environment? The ministry of Infrastructure and the Environment has asked TNO to answer these questions, by using an instrument that interactively shows the effect of urban planning on digital maps. This session will provide answers based on the application of the instrument in two Dutch cities.