(TELEGRAPH) — It is called “The Hyperloop” and, according to the designer, it will be a revolutionary “fifth mode” of transport, eclipsing trains, planes, boats and automobiles.

The “cross between Concorde, a rail gun and an air hockey table” will deliver passengers between U.S. cities faster than the speed of sound.

The history of transport is replete with dreamers who have concocted such schemes for getting people from A to B in previously unimagined haste. And many of them have remained just that, impractical ideas on a drawing board that will never see the light of day.

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