Also, I would be preocupied by the ways to carry this hypothetically produced energy. Right now we have either small "local" productions with "local " consumpt

Also, I would be preocupied by the ways to carry this hypothetically produced energy. Right now we have either small "local" productions with "local " consumption (that works well as there is little distance to be covered) or "large" production concentrated on one site and with tension raised to thousands of volts to allow delivvery to the final user. A "solar" road would probably make sense only in urban areas (where there would be other issues, like - say - shadow from buildings, less time of road free of vehicles, etc.) to avoid the issue of transporting the energy for long distances to the final users (or have a huge loss in the process).