I suspect the idea was partly that we already have to build infrastructure for roads; why not make the roads also a source of power? In practice it will take m

I suspect the idea was partly that we already have to build infrastructure for roads; why not make the roads also a source of power? In practice it will take many iterations to reach a point where it makes sense. Or it simply may never make sense. The recent articles about some California farmlands being converted to solar fields does make sense. They were running out of water, but they had a lot of land to use for something. Even if solar roads can work, there's still the problem of relatively inefficient tranfer of power over long distances. It makes little sense to spend a lot of money to make a solar road that's far away from energy consumers since a lot of the energy produced by the road will be lost in transit.