Abstract
Following the continuous field studies, daily cyclograms have been obtained for carbon oxide concentration in the air, wind velocity, and traffic intensity on main streets of a big city. It was stated that the morning and evening maximums in the air pollution are determined by the quantity adjustment of the incoming exhausts, by temperature and aeration regimes in the street environment. The following factors influence the spatiotemporal change of the pollution level: direction of roads and streets, number of floors and density of buildings, planning and tree planting techniques. It is shown that during designing and exploitation of transportation infrastructure, leveling of daily “peaks” in the air pollution can be provided by optimum geometric parameters of the cross section of main streets of various categories, removal of the transit traffic to alternate routes as well as individual transportation restriction in city centers.
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