That’s porous asphalt, developed in the Netherlands and used on 90% of the roads here. It is fantastic when it’s raining and it gets damaged really quickly when

That’s porous asphalt, developed in the Netherlands and used on 90% of the roads here. It is fantastic when it’s raining and it gets damaged really quickly when it’s freezing. In our climate the benefits heavily outweigh the downsides and we just apply a new top layer very often (once every 1 - 5 years).