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A capsule for an evacuated tube transport system, the capsule comprising a capsule body for carrying passengers within an evacuated tube; a first door disposed in a first end of the body; and a first coupling mechanism and a first sealing mechanism arranged respectively to couple the capsule to anot

A capsule for an evacuated tube transport system, the capsule comprising a capsule body for carrying passengers within an evacuated tube; a first door disposed in a first end of the body; and a first coupling mechanism and a first sealing mechanism arranged respectively to couple the capsule to another capsule at the end of the body while the capsules are moving and to establish a seal around the door and a corresponding door in the other capsule to enable passengers to move from one capsule to another through the doors without exposing the passengers to the pressure of the evacuated tube.

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1. A capsule for an evacuated tube transport system, the capsule comprising: a capsule body for carrying passengers within an evacuated tube;a first door disposed in a first end of the body;a first coupling mechanism and a first sealing mechanism arranged respectively to couple the capsule to anothe

1. A capsule for an evacuated tube transport system, the capsule comprising: a capsule body for carrying passengers within an evacuated tube;a first door disposed in a first end of the body;a first coupling mechanism and a first sealing mechanism arranged respectively to couple the capsule to another capsule at the end of the body while the capsules are moving and to establish a seal around the first door and a corresponding door in the other capsule to enable passengers to move from one capsule to another through the doors without exposing the passengers to the pressure of the evacuated tube; anda first reservoir arranged to be maintained at a pressure higher than the evacuated tube, the first reservoir in fluid communication with a plurality of vents disposed in an underside of the capsule to enable gas to be vented from the first reservoir to form a gas cushion under the capsule. 2. A capsule as claimed in claim 1, comprising a second door in a second end of the body, a second coupling mechanism and a second sealing mechanism associated with the another door whereby the capsule can be coupled to another capsule at either end of the capsule. 3. A capsule as claimed in claim 2, comprising a pump associated with at least one of the first and second doors operable to equalize the air pressure in the region between two doors when coupled with the air pressure in a cabin of the capsule. 4. A capsule as claimed in claim 1, comprising at least one further door in a side of the capsule to enable passengers to enter or exit the capsule when the capsule is stopped. 5. A capsule as claimed in claim 1, comprising a plurality of spaced apart fluid tanks disposed in a bottom portion of the capsule, the fluid tanks in fluid communication with one another so that fluid can be moved between tanks to alter weight distribution of the fluid. 6. A capsule as claimed in claim 1, comprising a plurality of extendable wheels arranged at radial spacing from one another to enable engagement between the wheels and an interior of the evacuated tube. 7. A capsule as claimed in claim 1, comprising at least one inlet via which gas is injected into the capsule to maintain the first reservoir at a pressure higher than the evacuated tube. 8. A capsule as claimed in claim 7, comprising a holding reservoir in fluid communication with the inlet and the first reservoir such that gas injected into the capsule is held in the holding reservoir prior to being moved to the first reservoir. 9. A capsule as claimed in claim 8, comprising at least one pressure controlled non-return valve between the holding reservoir and the first reservoir. 10. A capsule as claimed in claim 1, comprising a cabin arranged to be maintained at a first pressure suitable for carrying passengers and a second reservoir disposed between the first reservoir and the cabin and arranged to be maintained at a pressure lower than the first pressure.