What makes me think they'd jump in there with BOTH FEET, looking for "revenue," is the way they treat rainwater right now.
I have my own property, I put rainwater catch-barrels under spouts - and some county, city, state or federal entity comes after me for "stealing" rainwater? Fuk you, it fell on MY property... Them trying to tell me differently means they control the weather, so they own the rights to the water that falls. Even if it's on my land. They're only argument is that they obviously control the weather, because they MADE it rain over my land, right? Otherwise, they can suck my jockstrap.
They'll do it with solar roadways, bet yer arse - if it ever become more than a pipe-dream.
The rainwater stuff is scary enough - Check out all the news on it:
https://www.google.com/#q=rainwater+rights
Check out the EPA, going after this guy for building a pond on his own property - can you imagine a fine of $75,000 PER DAY?! Watch the vid...
http://www.foxnews.com/politics/2014/05/19/feds-target-private-pond/
That's not tin-foil stuff - it's happening right now. "Clean Water Act" will morph into "Assisted Solar Act" in short order, if Reid or this current Prez could find a way into it. We'd get the $hit taxed out of us.