Modelling Human Exposure to Air Pollutants in an Urban Area

61 Road traffic is one of the main sources of atmospheric pollution in urban areas, where the contribution of traffic flows, congestions and high population density typically increases the exposure of the settled population to pollutants [1-3]. One of the most important family of traffic-related pollutants is represented by nitrogen oxides (NO x ), whose main contributors to their emissions in Europe are the mobile sources (38.4%), followed by the energy production sector (21.1%), the commercial, institutional and household sectors (14.8%), energy use in industry (13.4%) and other minor sectors (12.3%)