in, land use, soil types) and emissions. Therefore, the emission inventories are easily seen as the scapegoat if a mismatch is found between modelled and observed concentrations of air pollutants [@PullesHeslinga2010]. The anthropogenic emissions, especially vehicular emissions, are highly dependent on human activity and constantly changing due to various factors ranging from economic (such as the state of conservation of the fleet, renewal of the fleet and the price of fuel) to legal aspects (such as the v