In order to investigate the temporal and spatial distribution of traffic emissions from urban roads on the roadside, the generation of traffic emissions on urban roads based on vehicle driving conditions was launched in Xi'an, and the temporal and spatial distribution of traffic emissions on urban roads was explored. The particulate matter was taken as the representative of traffic pollutants in this paper. This paper proposes a correction method of pollutant concentration diffusion on the roadside based on vehicle driving conditions. The actual driving conditions of typical vehicles under urban roads are obtained and their pollutant concentration diffusion on the roadside is calculated, which is verified by comparison with the field monitoring results. The results show that the proposed method is capable of predicting the concentration of pollutants on the roadside of urban roads with high accuracy and real-time based on the driving conditions of vehicles.

CICTP