Abstract: A substantially rectangular mobile platform with a plurality of vertically adjustable supports is provided for transferring passengers between a single corridor passageway of an airport and an aircraft having a plurality of doors on a side of an aircraft. A first room is mounted on the mobile frame and has a first portal for docking with a doorway of the single corridor passageway. A second room and a third room are slidably receivable within and extendable from the first room. The second room has a first vestibule that extends substantially normally from the second room to dock with a first aircraft door via a second portal, and the third room has a second vestibule that extends substantially normally from the third room to dock with a second aircraft.