Wow! What a concept, and it's really happening!
Here is an artist's rendition of Sandpoint, Idaho, from the Solar Roadways website:
What an extraordinary application of technology this is! And the idea and hexagonal panels can be used in sidewalks, bike paths... and no doubt applications as yet unimagined. These panels can generate heat to melt snow and ice, and the underground channels associated with them can carry electrical and telephone cables, eliminating overhead lines. One set of channels carries stormwater to facilities where it can be treated. Stormwater is a source of about half of the water pollution in the US.