This topic deals with the approaches that Member States use to plan future strategies for air quality, taking into account EU and national legislation (e.g. the National Emission Ceilings Directive) and at the same time fulfilling local compliance. The aims of this crossCutting task are to deliver (1) recommendations on methods to prioritize measures and policies,(2) recommendations on methods to assess the robustness attached to the potential impact of a modelled measure , (3) recommendations on how to integrate the requirements of the National Emission Ceilings and Ambient Air Quality directives. In the frame of this roadmap, the activities mostly focus on point (2) and include: