Scene Categorisation by Curvilinear Component Analysis of Low Frequency Spectra

An air beam structure for a passenger train is described which provides a train support beam having an inverted U-shaped cross section to minimize torsional effects, columnar supports for said beam diverging from an integral base and a stabilizer track centrally mounted on the top surface of the train support beam. The stabilizer track includes a head having stabilizer wheel running surfaces on its undersides, and portions of the stabilizer track are flexible and may be bent between diverging train support beams to allow switching.