The main provisions of the methodology for calculating and designing a "green drainage system" of surface runoff from the road network of settlements that are not equipped with an underground drainage and treatment system are given. Requirements for the "green drainage system" of surface runoff from urban streets that are not equipped with an underground drainage system are formulated. The requirements include the treatment degree of surface runoff, filtration rate, comfort of the visual environment, safety and convenience for pedestrians and bicyclists, technologies of winter maintenance. The main pollutants of surface runoff for different categories of Russian streets are identified. The composition and depth of filtration media, its operating life, types of green plants are determined depending on the composition of pollutants, their typical concentrations, the collection area of surface runoff and the composition of native soils. Examples of the most effective design solutions for the "green drainage system" and treatment of surface runoff from the road network are given.The main provisions of the methodology for calculating and designing a "green drainage system" of surface runoff from the road network of settlements that are not equipped with an underground drainage and treatment system are given. Requirements for the "green drainage system" of surface runoff from urban streets that are not equipped with an underground drainage system are formulated. The requirements include the treatment degree of surface runoff, filtration rate, comfort of the visual environment, safety and convenience for pedestrians and bicyclists, technologies of winter maintenance. The main pollutants of surface runoff for different categories of Russian streets are identified. The composition and depth of filtration media, its operating life, types of green plants are determined depending on the composition of pollutants, their typical concentrations, the collection area of surface runoff and the composition of native soils. Examples of the most effective design solutions for the "green drainage system" and treatment of surface runoff from the road network are given.

urban street, stormwater, rain garden, design, methodology