>>1994794>The advantage is that except the far ends of the cars theyhave completely level floor at platform height, while other EMUs have a much more irregular floor height with ramps and protrusions hidden below the seats and whatnot. From that perspective I actually find them superior, although I think by now this is an obsolete model.The new TGV-M have a little "wagon" named greffon just behind the two loco, it have several advantages, first, until now due to design the TGV must have been two types of coachs now all the coach are the same and shorten by 1m and it reduce cost increase fexibility and also shorten the loco by 4 meters so no space lost, second, technical equipments are moved in those greffon and above all they are equiped with big batteries allowing autonomous of the train for few hours in case of powerline shutdown and the ability for the train to move at low speed to a station or a functional power line. This capacity can also be used in case of overloading of the electric network to smooth consumption.