A short time ago road pavements were ment to be of high density and with a smooth surface. However today porous asphalt has proven to be safer against aquaplaning and friendlier to the environment, because rain water is able to filtrate into the ground as on natural surfaces.
Japanese engineer Hisashi Hosokawa has developed a train of equipment which recycles the asphalt on roads and highways in situ and uses it again at the same site as porous asphalt. This method needs only a small fraction of new material compared to the traditional way of road reconstruction.
This new technology is environment-friendly in a double way: it uses less new asphalt from petrol refineries as well as less transport. It is obvious that this form of cost reduction fulfils the criteria of Blue Economy innovations.