US Patent 10286925 Intelligent POD management and transport

A transport system has a first set of substantially parallel rails supported above ground level by support structures, a trolley having wheels mounted to a frame with the wheels engaging the rails, at least one wheel powered to move the trolley along the set of rails, a portion of the frame depending between the rails to a level below the rails, and a downward-facing latching interface on the depending portion of the frame, and a pod enabled to carry a passenger or parcels, or both, engaged by an upward-facing latching interface to the downward-facing latching interface of the trolley, such that, as the trolley travels along the rail set, the pod is carried along below the rail set.