 The surface is made of big pieces which create little openings for water to run through. That sounds great. Should we replace all of our pavement with this stuff? Unfortunately, it's not that easy. It's not a good choice for roads in places like Rhode Island. We have to sand the roads in the wintertime to make them safe. It would basically fill these pores in the concrete and essentially make it impervious. It's easier to make parking lots that are stormwater-friendly, though.