Who killed CyberTran?

This is a pretty sweet transportation concept that apparently has been around for a while, but for whatever reason hasn't taken off yet. CyberTran is a personal rapid transit system that carries small groups of people in lightweight rail vehicles. The ultra-efficient system is compared to an elevator, in that it only stops where the passengers need to go.

Here's more info on CyberTran. Skip straight to 'media' for cheesy video.