That's very cool interesting. I'd imagine the water cooling aspect would definitely help a lot, though one area that seems to be overlooked is the space above roadways. Of course, there is the caveat of it not being as viable in areas with many tall buildings to block the sunlight, but it's still an option to consider for many locations. At any rate, it's a lot more practical than making the roads themselves solar panels.
RE: CHINA- THE HOME OF THE LARGEST FLOATING SOLAR POWER PLANT