The activities of the General overhaul include those works concerning the efficiency restoration and reconditioning ofsafety systems and special parts which are involved during the functioning, with the aim of returning the rolling stock back to a state of quality standards established by the relevant safety criteria which regulate suitability of a rolling stock of operating on the RFI infrastructure. Interventions or modifications concerning the regularity of the vehicle’s on-board systems. Interventions or changes within the vehicle to give a new decoration of the interior environments of it, adjustments that go by type of vehicle and arranged and chosen with the customer.