An extensive effort is actively being made to implement permeable pavement systems in urban or residential areas of South Korea in order to achieve an efficient water circulation system based on a low impact development (LID) design concept. This paper describes the work to evaluate the per-formance of geosynthetic-reinforced crushed stone subbase for permeable pavement systems, based on experimental programs. In addition, a discrete element based numerical analysis was conducted to charac-terize the relationship between crushed stone particle distribution and geosynthetic aperture size. From this assessment, the geosynthetic-reinforced crushed stone subbase for permeable pavement systems seems to be promising to provide better load bearing capacity in case of water infiltration throughout the substructure layer. In addition, a discrete element modeling was successfully employed to find that the av-erage particle size (D50) needs to be around 60 percent of the inscribed circle’s diameter of geosynthetic aperture.
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