The weight is already pretty much a non-issue.

Well put.

There's no such thing as a photovoltaic panel that will pay for itself in a few years. They're too expensive to produce and not efficient enough at generating electricity.

We'll never see solar installed (on a large, commercial scale) on road surfaces. It's not that I hate "progressive ideas" — I'm a science fiction geek! It's not that I want to shoot down this idea because I'm threatened by it — I work in the solar industry. I produce semi-amorphous micro-crystalline thin-film…