Cool coating on residential streets, IS making a difference.
Phoenix has been coating roadways with a reflective coating to reflect solar radiation/heat, trying to reduce the heat island effect.
Last summer they started testing the 130 some odd miles of this, after four years in place, to see if it really works.
They found a direct loss of 10 to 12 * of heat due to reflection. They noted that one can feel the extra heat coming up from the street when crossing. It is a light grey in color with a semi glossy surface, that they squeegee in place. I don't know about traction, motos, and rain, issue.
This positive result should increase the treatments, maybe into parking lots and runways.