A Road That Pays for Itself.

From article, (Solar Roadways is the brainchild of husband-and-wife team Scott and Julie Brusaw from Sagle, Idaho, who want to bring the humble road surface into the electronic age. Solar Roadways are comprised of rugged hexagonal glass plates in which are embedded solar cells, electronics, and LEDs. Where asphalt roads must be continuously patched and repaved, the panel making up a Solar Roadway simply would be swapped out if they fail. And where today's highways and parking lots just sit there soaking up the sun, Solar Roadways would produce energy. "Unlike the asphalt system, a Solar Roadway pays for itself through the generation of electricity," Scott Brusaw tells PM.
"Assuming the technological promise is as it appears, I think it might have a shot," Levine says of Solar Roadways. "And here's why: it's readily deployable at a small scale. Unlike...inductive charging in roadways, it's actually not dependent on what other people do, or what other agencies do, or what other municipalities do.
"So let's say I'm a municipality, I've got a big parking lot, and I want to say, 'Hey, you know what, let's give this a try, in this big parking lot. We're not going to go over to the roadways quite yet, we're going to do the parking lot.' And if I can demonstrate that it does what they say it does and it quickly pays for itself and then starts generating a surplus, then wow—the logic becomes pretty impeccable.") We Could Build a Solar-Powered Roadway-But Will We?