The Shweeb is a human-powered monorail system that makes use of a series of pedal-pods suspended by a metal rail. Easy to operate, Shweeb cars can move up to 25 mph, reportedly without excessive effort.
The Shweeb is still a standalone gimmick/prototype of sorts that sits on company grounds in New Zealand. But they see their contraption as something that would fit perfectly in natural parks for guided tours, or even adventure tourism destinations, where it could be used for racing games.
But here's the question--if you have these things in scenic parks, what happens when one person stops, and the person behind them keeps pedaling?