the north, east, and north-west networks. With the progress of the 25 kV electrification, they quickly supplanted steam locomotives on services, from prestigious TEEs to interregional trains, and to certain fast freight trains. Their versatility, their robustness, and their performance, have allowed certain members of the class to exceed 53 years of service and more than traveled, which remains exceptional. The arrival of more modern and more powerful machines, of the BB 15000, BB 22200, BB 26000 classes did not lead, to their downgrading, because they still met the needs very well. With the entry into service of the LGV Est in 2007, the transport offer has refocused around TGVs, freeing up many locomotives and imposing a reorganization of operating diagrams. A large number of BB 15000s were transferred from Strasbourg to Achères to operate Corail and TER services from Paris-Nord and Paris-Saint-Lazare. Some were modified for push-pull operation, quickly leading to the withdrawal of the BB 16100 classes used before and greatly reducing the use of the BB 16000s. BB 16061 provided the last service of class to Paris-Saint-Lazare on 03/13/2010 with the haulage of a Paris - Le Havre train. The class, still managed by the Achères MPD, was assigned to Paris-La Chapelle for the operation of the Corail-Intercités (CIC), on diagrams common to the BB 15000s and the BB 22200s. Withdrawals of the class occurred between 2009 and 2012, some units being parked on the Sotteville-lès-Rouen branch, an antechamber for upcoming demolition. A celebration was organized by an association of retired drivers from the Aulnoye depot, on 24 November 2012, on the occasion of the 1637 Paris to Maubeuge train, hauled by BB 16029 decked out for the occasion. This involved a photoshoot at Paris-Nord and live entertainment at Aulnoye-Aymeries station. The last two locomotives kept in active service, BB 16029 and BB 16051, were regularly in use until 16 December 2012, hauling CIC services between Paris and Amiens and Paris and Maubeuge. The last six members of the class were withdrawn from service on 31 December 2012. Route allocation Principle routes served were: From Paris Saint Lazare: Rouen - Le Havre (last trip on March 13, 2010) Lisieux - Trouville-Deauville Caen - Cherbourg From Paris Nord: Longueau - Amiens Lille - Tourcoing Arras - Dunkirk Aulnoye - Jeumont Tergnier - Saint-Quentin - Cambrai Compiègne - Saint-Quentin - Maubeuge (last trip on December 20, 2012) From Paris