The Hyperloop is a conceptual high-speed transportation system being developed by entrepreneur Elon Musk. It's a pressure-reduced tube system in which pressurized capsules riding on air-cushions are shot between destinations by linear induction motors at speeds nearing Mach 0.85.
The system is innovative and new -- not to mention fast -- and most of all cheap.
The first proposed route Los Angeles to San Francisco is budgeted at $6 to $7.5 billion dollars -- a fraction of what a single airport on either destination costs.
To test the feasibility of the concept a test track is being built in full scale on a 5 mile track.
Unlike other so-called 'innovative' transportation systems of the past (like Maglev trains or even the Concorde) Musk's system relies on open-source technology. That means many aspects of the technology developed by Musk's team are free-for-use by other companies. This has caused the formation of various ventures -- including rival projects -- that all rely on each other to develop the technology. This has radically brought down production costs and allows for faster production and better methods to overcome technical hurdles since more people are working on the various programs and sharing results.
Thanks to this give-free-receive-free concept the Hyperloop stands more of a chance of becoming a reality.