The study is devoted to the investigation of atmospheric air pollution by particles up to 10 microns in size (the most dangerous among suspended particulate matter) in the roadside area in urban areas. The aim of the research is to quantify the air pollution in the roadside area by micro particles from vehicle emissions. We performed direct (by VSON Agris WP 6910 device and data from the Ecocity weather site) and indirect (using the indirect method in the study of melted snow samples) measurements of the concentration of micro particles in the atmospheric air of the roadside space of highways in Kharkiv. Indirect measurements have shown that the amount of micro particles ranges from 0 to 25% of the total number of particles in the studied samples. The results of direct measurements showed that the concentrations of PM2.5 and PM10 in the roadside atmosphere are positively correlated, with PM2.5 and PM10, or only PM10, predominating among micro particles. On one of the streets studied, the concentration of PM2.5 exceeded the regulatory permissible level (European Standard 2024) in one third of the samples, and the concentration of PM10 in 40% of the samples. The daily dynamics of micro particle concentrations in the roadside air correlates with the intensity of traffic. The concentration of micro particles PM2.5 and PM10 in the roadside atmosphere correlates with the concentrations of nitrogen-containing gases (sources of secondary micro particles formation): positively with the concentration of ammonia and negatively with the concentration of nitrogen oxide.