The initial AGV design incorporated a number of new features: an electrically-activated active suspension (in the direction to movement), used to limit oscillations between car and bogie; and eddy current brakes, fitted to the end bogies. Both technologies had been previously trialled on TGV sets. The carriages were constructed from aluminium alloy as used on the TGV Duplex. The transformers, which weigh 6.5 tonnes, are fitted underneath the end cars, since the presence of the leading bogie allows the mass to be distributed over three instead of two axles. The interior structure was designed to allow easier refurbishment and alteration to the passenger environment. The floor level is kept practically constant throughout the train, including at inter-coach connections.