This study describes a new idea of allowing the overflowing urban drains that cause flash flooding to be connected to a permeable road structure beside the drain. The permeable road with water storage/convey structure could soak up the spill-over waters from drains. In this regard, the Storm Water Management Model (SWMM) was utilized to assist the investigation by simulating a historical flood event with a total rainfall of 324 mm over 5200 m 2 of commercial area. It was expected to generate 1685 m 3 of surface runoff. The model provided an insight that reducing the flood event's peak discharge by half would require to have a spill-over space of 640 m 3 in the permeable road with a surface area of 1600 m 2 and a depth of 0.40 m. This allowed a guide to the selection of suitable products to construct the permeable road.