Erik Schlangen Demonstrates the Potential of “Self-Healing Asphalt”

In terms of noise reduction, there are other things you can do to the roadway (basically different forms of grinding/milling the surface to create different rolling textures) to reduce noise, but these methods a) only provide minor (a couple dB) reduction in noise and b) can negatively affect surface friction which increases longer stopping distances, etc. Concrete (by which I mean portland-cement concrete) is also problematic in northern climates, which is why you don't see it used extensively in northern states. I'm not a water quality/watershed expert so I won't speak to that.

One solution I have seen to address clogged pores is to use vacuum trucks to suck up the grit, but I've seen enough presentations by highway engineers to know that this is not considered to be a viable long-term solution.