Getting floodwater and stormwater off of parking lots, sidewalks, and other surfaces is not always a cheap or simple process. Tarmac Topmix Permeable is developed to change that. It is a fast draining concrete payment solution with an average permeability rate of 36,000mm/hr.
As you can see in the above video, this solution allows 4000 liters of water to drain in 60 seconds. It simply offers easier stormwater management. More information is available here.