Relationship between modelled pollution of nitrogen dioxide and traffic flow

Abstract

The aim of this research was to assess the relationship between modelled concentration of nitrogen dioxide (NO2 ) in streets with different traffic intensity and composition and to estimate the air pollution of NO2 . ADMS-Urban dispersion model was used to estimate a level of nitrogen dioxide in streets of Kėdainiai city. Strong positive correlation was observed between the traffic flow and the concentration of NO2 . The linear relationship between the heavy traffic flow and NO2 level was stronger than between the light traffic flow and NO2 . The median concentration of NO2 in streets with high, medium and low traffic intensity was 14.27µg/m3 , 10.34µg/m3 and 7.9 µg/m3 , respectively. This study has shown that the level of nitrogen dioxide is directly related with traffic flow, especially high traffic flow.