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Black-Box Data Point to LZB Signalling Failure and Communication Breakdowns in Urda High-Speed Crash

Recorded timestamps, failed resets and unanswered calls, together with precise impact measures, have shifted investigators toward a likely failure of the LZB continuous train‑control system.

Overview

  • A Renfe AVE struck a stationary Iryo high-speed train near Urda on October 28, killing 69 people and injuring more than 200 with dozens still hospitalized.
  • The Iryo train’s event recorder places the collision at 08:53:12, shows the impact lasted about nine seconds, records the struck train reaching roughly 47 km/h in the first three seconds, and notes a third carriage overturned.
  • Black-box and control-centre logs show controllers had ordered drivers to disconnect and reconnect the LZB system before the crash, and the Iryo driver experienced a total transmission loss about 15 minutes earlier.
  • The Iryo driver tried to contact Atocha control three to four times without response, attempted two LZB restarts that failed, and received maintenance help from 08:51, about two minutes before the AVE arrived.
  • Investigators now focus on the LZB continuous train‑protection system and procedural communications between drivers, maintenance and the Atocha control centre while technical and judicial inquiries continue and authorities tend to victims and the accident site.