Richard Garriott already has. The Austin computer game developer, who has no shortage of vision, is just one example of someone in the private sector with an idea for making mass transit cleaner, safer and more desirable — someone who views the current pipe dream of high-speed rail as obsolete. Fifteen years ago, Garriott began toying with an idea he called "computer-controlled gondolas." "What happened in the intervening years is that many other people have thought of it and invested in it," he says. “Now this hypothetical thing I was talking about is at its time.”