Interior of a Class 22500 "MI-2N" EMU of SNCF-IdF (RER-E).
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Middle-vestibule (i.e. 1 of the 3 "Urban areas"), seen from the Upper deck (i.e. 1 of the 2 "Regional" areas). 
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No direct access: one has first to walk down the stairs to the adjacent end-vestibule, then cross the seating-area (i.e. 1 of the 2 "Suburban areas") on the Lower deck underneath.
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1st July 2007.
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P.L.Guillemin (plguillemin@yahoo.fr)