With a high population, different types of active vehicles in the city, factories and industrial units, manufacturing workshops, residential and office units, and consumption of various types of fossil fuels due to industrial use, welfare, traortation, etc., Esfahan city is one of the most polluted big cities in Iran. Traortation section is one of the most important economic parts in large cities. The air pollution system caused by traffic consists of several effective elements and factors that pave the way for a complex system. With regard to the increasing trend of air pollution in the city, the need for awareness of effective elements and factors in traortation sector in the pollution distribution in city air, as well as the amount of contaminants and the determination of air index contaminant using their emission coefficients and ultimately suggesting methods to control and reduce them in an attempt to prevent environmental degradation has emerged more than ever before. Therefore, in this research, a systematic analysis approach has been used to model and investigate the air pollution system caused by traortation and traffic. In this study, exogenous and endogenous variables in the model using experts' opinions and reviewing the literatures, data from the comprehensive studies of Isfahan traortation during 1367, 1379 and 1391 were employed to determine the initial input variables. Then, relations between the variables were interpreted, explained and drawn in Visio software. After determination of regression relations and investigation of the relationship and changing trend in the variables involved in air pollution system in Isfahan using Excel software, these qualitative relations were turned into quantitative relations, and finally, using the propagation coefficients of each traortation method as input variable and kilometers covered in a day, each pollutant's emissions were calculated for each traortation method, and based on five non-policy enforcing scenario, a 50 percent reduction in travel rates, reduction in share of single-rider private cars, enforcing Euro 5 and 6 emission standards, and finally implementing the policy package, the system behavior was investigated and predicted for the 1400 and 1415. According to the emission calculation results based on the three period data of comprehensive traortation studies, it was found that private vehicles have the largest share in various traortation methods in producing various traort-related pollutants, and 60% of traort-related pollutants are associated with carbon monoxide and the lowest emissions are related to sulfur oxide contaminants. Enforcing the policy of single-rider private cars’ share in the emissions of all pollutants has had an almost equal effect, and this effect for the total daily emissions is equal to a 31% decrease in the short term period and a 63% reduction in the long run. Moreover, the impact of enforcing the policy of standard pollution of fuel and vehicle in the total daily emissions of various pollutants has reduced by 36% in the short term and 79% in long run. Enforcing the policy package obtained a 98% reduction in total various daily emissions in the long run. Obviously, combining different policies and their simultaneous implementation can be useful for comparing different policies’ combinations with respect to their costs. In examining the effect of different scenarios, that of applying Euro 5 and Euro 6 emission standards in 1400 and 1415, respectively, was predicted to be the most effective policy towards reducing emissions by traortation. Keywords : Isfahan City, Private vehicle, Systematic thinking, Traortation Pollutants