... possibility of determining emissions not only from the engines, but also from evaporation of fuel However, it is not always possible to find a tunnel close or inside the city were the emissions ... (1) in which, C is the concentration of a particular pollutant in the street (g/m3 or mg/m3); E is the emission of the pollutant from road traffic in the street; F is a function describing the ... Comparison with the other studies in the world shows that the emission factors of NOx for MC in this study is not different with the study in Taiwan [17, 18] Similarly, the emission factors of NOx for...