The 54 sub-stations of Aquitaine and the south of Poitou-Charentes are grouped together in the Central Sous-Stations, in the Bordeaux Saint Jean station. You will be greeted by the leader of this «Control Tower» who will present you the place and the missions of its 15 Regulators. At the Central Sub-Stations, we provide the optimal traction energy for electric rail traffic. We are the electricians of the rail and the guarantors of safety since this is where the electric current of the railway network is cut or restored. And that includes night and day, weekends and holidays». In disturbed situations such as troubleshooting operations, they become true “conductors”, allowing the service to be restored in compliance with safety rules. And to juggle between the different sound alarms, the calls on the 3 telephone lines and the synoptic table to update, they have 3 watchwords: Responsiveness, discernment and rigor!