Arak is ranked 71st in the worldchr('39')s most polluted cities. Arakchr('39')s air is more polluted than the Iranian capital in terms of pollutants. The influx of large amounts of pollution into the city shows that a high percentage of pollution is concentrated in a small town, and this volume of pollution is very dangerous for both humans and the environment. In order to reduce air pollution in the city, the Iranian government in 2007 approved a plan called the comprehensive plan to reduce air pollution in Arak. In this comprehensive plan, the construction of a highway called Amirkabir (58 meters) has been approved, which connects the east and west of Arak. In this article, numerically and experimentally, the effect of constructing this highway on the reduction of air pollution in Arak city has been investigated. In the results section, the details of changes in air pollution in Arak city before and after the construction of this highway have been compared. The results show that a 2.75 percent decrease is observed for Nox pollutants, 4 percent decrease is observed for Co, and a change is obtained for So₂. As a result, the implementation of this project at a very high cost will not have a significant impact on improving air pollution in the city of Arak.

Keywords: Air Pollution, Arak, Amirkabir highway, Nox, Co, So2

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