serious accident
as defined in Directive (EU) 2016/798 of the European Parliament and of the Council of 11 May…, Article 3, point (12) (Definitions)
any train collision or derailment of trains resulting in the death of at least one person or serious injuries to five or more persons or extensive damage to rolling stock, the infrastructure or the environment, and any other accident with the same consequences which has an obvious impact on railway safety regulation or the management of safety; ‘extensive damage’ means damage that can be immediately assessed by the investigating body to cost at least EUR 2 million in total;