Solar Roadways? The future or just a vivid imagination?

I admit cyclists as a community don't normally think about the quality of the roads except in relation to potholes and bicycle lanes, but this video caught my attention because the concept of solar roadways would affect cyclists, motorists and pedestrians.

The video is amusing (and possibly not suitable if you are watching this at work because the guy says "freaking" so much it sounds like he is swearing), but it does make you wonder whether it would be economical to actually build what he is talking about. If the math works for building the materials, installing, and the cost savings is enough - then yes, I guess we could really have solar roadways as an option.

Obviously solar roadways would be more advantageous in the USA than it is in Canada. The cost of heating the roads in Canada would be too prohibitive, but it would make total sense in southern states and even a few northern ones where it doesn't snow that much. We could probably even get away with it in southern Ontario, but I don't think it would work in the prairie provinces.