Methodology for setup and data processing of mobile air quality measurements to assess the spatial variability of concentrations in urban environments

► Mobile measurements are used to assess the variability of air pollutants in urban environments. ► PM2.5, BC and UFP concentrations are presented for zones with different traffic characteristics. ► A methodology for background correction based on the mobile measurements is presented. ► The background concentration is estimated as the 25th percentile of the urban background data. ► The minimum numbers of runs for a representative estimate is reduced after background correction.