I'm in the solar industry, and these guys have been around and trying to raise money for like 5 years. They're a joke. In that time, no one has given them the time of day , because anyone with even a small inkling of how solar works can see this for the stinker that it is. As a solar power generation system, this dramatically increases the cost, technical complexity and maintenance, while reducing power output something like two to three times. Way more cost for way less power. As a road, this increases the cost per square foot of roads by 20-40 times, ignoring the fact that road workers would need to also be certified electricians to do their work. Worst of all, this doesn't really solve a problem. There is no shortage of places to put solar panels. This sounds cool, but the reason every investor who has looked at this has turned away is because you can't build a business based on the idea of higher cost for less performance.

Put a solar panel next to the road, or above it on a canopy and it will cost 3-5 times less, and produce 2-3 times the power.

As an engineer who designs solar arrays, I see so many issues with a project like this. I hate to be a Debbie Downer, but it's just hopeless.

Edit: I posted this below, but I guess it got buried:

Here are a few reason why this won't work: Roads experience thermal expansion and contraction, and movements from ground subsidence, frost heave, etc. asphalt can flex, and when it cracks is still safe, and can be fairly easily repaired. The same isn't true for glass panels with electrical connections. You could build these on a strong concrete bed, but that first layer will already cost more than an asphalt road.

Solar arrays are getting much cheaper, but they're plenty expensive as is, and these features add significant cost. Features like thick thick textured glass, lights, microprocessors, etc. and don't forget all the high tech connections it will need to be able to handle being water logged with grimy dirty salt water with no hope of a good cleaning for decades. That's hard enough to do in a traditional array that's high and dry.

Yield is problematic also. Most roads are near buildings, light poles, trees, bridges and countless other obstructions that will block the sun. That not only directly cuts output, it also reduces service life and can cause other problems. Making the panels "smart" can cut down on some of this, but at great expense (and it's an unproven technology).

How will all these get connected to the grid? They'll require a fleet of new transformers to connect them to power lines, or they'll get connected to existing ones. The problem with existing ones is that many are at capacity, and they're typically located on private property. That's a permitting and legal nightmare.

There are much easier, safer, better proven and cheaper ways to get solar power at a lower cost. Theoretically, these will all get exhausted some day, and solar roadways will be the sunniest option, but that's a long way off, and still might never be effective.

this is a ludicrous idea.

there's no shortage of empty space to put solar panels - they cost a fortune to produce and, given that, the one thing you want is an unobstructed path between the sun and the panel. every car driving over them blocks out the sun, covers them in mud and wears out the surface of the panel.

solar panels are smooth and glassy so that they don't refract a lot of light - this is the opposite of what you want from a drivable road surface with a lot of grip.

as soon as these charlatans can give some figures about the costs per-mile per-lane for these, expected life time, how they age, how much energy they actually produce etc. etc. then fine. but at the moment they're just liars who long ago realised how crazy the concept is.

"one problem"

No, you fucking moron. And your reason for supporting it is that it "dose seem real cool"? So do lightsabers, heat-seeking shark launchers, and super-powered human exoskeletons. Pick one and shove it up your ass.