Influential parameters on particle exposure of pedestrians in urban microenvironments

► High-resolution time characterization of urban aerosol. ► Evaluation of each influence parameter on pedestrian exposure. ► High peak number concentrations in street canyons with traffic jam. ► Higher mass concentration (resuspension) in streets with fluent traffic conditions. ► Influence of the pedestrian distance (kerb- or building-side) to the traffic emission.