Reinitialization method of a zone controller and associated automatic train control system

A reinitialization method (100) of a zone controller (ZCn) in a train supervision system of the “communication-based train control” type, including the following steps, carried out by the zone controller (ZCn):

• during a nominal operating period (F1) of the zone controller, periodically saving (110, 130) an image of a current operational situation on an external memory;
• and
• after a downtime period (F2) of the zone controller and after the zone controller has been rebooted (300), during a reinitialization period (F3):
• establishing (320) an image of the operational situation after rebooting the zone controller;
• recovering (340), from the external memory, a most recent image of the saved operational situation as image of the operational situation before the failure of the zone controller;
• collecting (340) crossing information on the crossing of borders of a zone (Sn) associated with the zone controller (ZCn) during the downtime period of the zone controller;
• and
• verifying (350) the coherence of the image of the operational situation after rebooting the zone controller from the image of the operational situation before the failure of the zone controller and crossing information.