Abstract
This mini-paper describes the background to the decision of the Régie Autonome des Transports Parisiens (RAPT), the Paris Transport Authority, to develop a new form of rolling stock for operation on the urban Métro network (as opposed to the RER), where car size is severely constrained by a tight loading gauge and extremely sharp curvature. The object was to provide for better passenger distribution throughout a train, coupled with a reduction in overall weight and a reduction of waste space between vehicles, with a consequent increase in the effective passenger capacity.
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