LZB, ERTMS and CDI 113 + 200: a week deciphering the 17 minutes of the Urda accident

A week after the Urda train accident, investigations reveal critical failures in safety protocols and communication. The LZB system failure led to a tragic collision between an AVE train and a stationary Iryo train, resulting in numerous casualties. Key findings include miscommunication from the Atocha control center, where incorrect protocols were applied, allowing the AVE to proceed at high speed despite the danger. The investigation involves extensive audio recordings and interrogations of railway workers to understand the sequence of events leading to the disaster. The lack of the ERTMS safety system on this line has raised concerns about the adequacy of existing safety measures.