The problem is comparative cost. It's much cheaper and more efficient to build regular roads and regular solar panels. In such configuraiton: - solar panels w

The problem is comparative cost. It's much cheaper and more efficient to build regular roads and regular solar panels. In such configuraiton: - solar panels won't ever be obstructed by cars - maintenance will be much cheaper and won't block the traffic - solar panels won't need to have pressure and wear-resistant cover that is still transparent in the whole spectrum (to not waste parts of it) - roads will be much cheaper and safer (optimize for grip instead of grip+transparency)