This paper presents the analysis of air pollution monitoring and evaluation results in the center of Riga City. The air quality reports have pointed out that road traffic and road infrastructure are the main issues of air pollution in the center of Riga. However, none of the reports validated this assumption considering actual traffic flow data. In the present article, the air pollution data have been collected and analyzed in the context with traffic flow. The statistical analysis of both the air pollution and traffic flow data was performed and the correlation between them was established and evaluated. Finally, the conclusions and recommendations for further improvements of the methodology of measurements necessary for successful air quality assessment in the urban areas and particularly in Riga city are given.