One suggestion I like a lot is making walls with solar panels along highways. They'd reduce sound pollution, hinders wild animals to run into the road while at the same time producing electricity in a space not used for anything else.
Why do you think that less than half the panels will receive sunlight? Also, panels are very cheap today, so their placement doesn’t mean to be optimal. I believe the cost per kWh will be cheaper with panels mounted vertically off the ground than building a roof to place them on.
