tracks 2, coming from "austerlitz", follow a very peculiar profile and do not service the station "mirabeau", instead crossing behind it with a sharp ramp due to the great depth of the line after traversing the seine. furthermore, in order to reach the station "église d'auteuil", the tracks must climb even higher very close to the station's foundation. following this, tracks 2 of the line pass behind tracks of line 9 and arrive at the station "michel-ange – auteuil", which has a central platform surrounded by tracks 2 and tracks h coming from a connection with line 9. arriving at "porte d'auteuil", the tracks separate to form the complexity of tracks that head towards boulougne, a maintenance station, "murat", or towards "michel-ange – molitor".