The only thing roads have going for them as a location for solar is that we (humans) have a lot of road area to work with. Wouldn’t it be great if roads did dou

The only thing roads have going for them as a location for solar is that we (humans) have a lot of road area to work with. Wouldn’t it be great if roads did double duty supporting our tires AND making some energy? I’ve always wondered if there were some way to use the space above (as in you drive under them) the roads instead. Is there a mass-efficient-enough design to make putting panels above the road a profitable thing.