[oil pan 4]

If the intergrated road heaters work so well why dont they use them now?
This is the problem with green energy, no one tries to prove things in steps. They want to go all in, spend other peoples money on a massive scale, throw all this unproven technology to the wolves, and pray for it to all work (or take the money, file for bankruptcy after it fails catastrophicly and run since that was the plan all along).
If they wanted this to work and not swindle the government out of millions of dollars like all those solar panel manufacturer start ups and electric vehicle start up did over the last 6 years they would make it work in steps.
They would use the funnel approach. They would build the foundation. Start with a nearly indestructible foundation for their solar road way. A nearly indestructible road by its self would get a lot of peoples attention.
Then prove the deicing system works. Then do a cheaper self lighting only option.
If they only offer the single most expensive option I doubt their motives and product.
If they made all these things work independently they might do a lot better. Say the solar road way doent work so great with vehicles on it all the time, so make a solar brake down lane, then make the actual part that gets driven on self lit road way with a single self deicing lane as your standard divided 4 lane interstate highway package. Make a whole system that is scaleable and can be mixed and matched and built to fit customers needs. You know the kind of stuff self supporting real for profit companies do when they really want and care about making a product that works and can be sold to as many customers as possible.

LED street lighting is a no brainer. Sodium and Mercury vapor lamps are at most 25% efficient and LEDs at there worst are 90% efficient.

I really like the road tunnel thing only problem I see is it makes adding additional lanes really fun and expensive.