Adif President Challenges Civil Guard Report on Adamuz Tragedy: ‘Not Well Interpreted’

The investigation into the catastrophic rail collision in Adamuz, Córdoba, has entered a new phase of technical dispute. Pedro Marco de la Peña, the president of Adif, the entity responsible for Spain’s railway infrastructure, has formally questioned a report from the Civil Guard regarding the causes of the January 18 accident that claimed 46 lives.

At the heart of the disagreement is a critical window of time. The Civil Guard’s report, submitted to the investigating judge, suggests that the rail track broke 22 hours before the collision occurred. Adif has now pushed back against this conclusion, arguing that the technical data used to support the claim has been misinterpreted.

The Dispute Over the ’22-Hour’ Window

The Civil Guard’s hypothesis rests on data from the Sistema de Apoyo al Mantenimiento (SAM). According to the investigators, the SAM recorded an electrical alteration—specifically a voltage drop—that they believe is compatible with a rail break. The report claims this event happened nearly a full day before the crash, but no alert was triggered because the system was not configured to notify operators of such an incident.

The technical specifics are narrow. The Civil Guard noted that while the SAM detected a continuous drop in tension, the system only triggers automatic alarms if the voltage falls below a specific threshold of 0.780v. In the Adamuz case, the tension remained above that limit, meaning no alarm sounded despite what the Civil Guard describes as a detectable anomaly.

Adif’s Technical Rebuttal

Pedro Marco de la Peña has rejected the notion that the SAM is a viable tool for detecting structural rail failures. He argued that the system is designed for the reliable positioning of trains, not for identifying anomalies like track breakages.

“No system exists that reports a track break in real time,” Marco de la Peña stated, asserting that a drop in tension within the SAM cannot be interpreted as a confirmed rail failure. He further emphasized that the claim that track circuits are a reliable method for detecting breaks is not supported by international experts.

Adif’s leadership maintains that the organization was not obligated to detect a rail break the moment it occurred using these specific circuits. Marco de la Peña pointed out that the Civil Guard’s report does not accurately reflect the sentiment of his previous statements on the matter.

Key Technical Points of Contention

The clash between the infrastructure manager and the police force boils down to three primary technical disagreements:

• System Purpose: The Civil Guard views the SAM as a potential early-warning system for track integrity; Adif views it strictly as a train-positioning tool.
• Voltage Thresholds: The Civil Guard argues that the lack of an alert was a configuration failure; Adif argues the 0.780v threshold is the standard and that readings above it do not constitute a failure.
• Reliability: Adif cites international standards to claim that track circuits are fundamentally unreliable for detecting rail breaks.

To provide further context for the court, Adif has also informed the judge about a track change that took place 1.3 kilometers from the site of the accident.

The Human Cost and Judicial Path

The technical debate arrives as the judicial process continues to seek answers for the families of the 46 victims. The January 18 collision remains one of the most severe recent incidents on the Spanish rail network and the determination of whether the accident was preventable—specifically whether a rail break could have been detected 22 hours prior—is central to the legal proceedings.

For those following the case, the core question remains whether the existing safety protocols were sufficient or if, as the Civil Guard suggests, technical specifications for alerts were ignored by Adif.

The investigation remains ongoing. The next confirmed checkpoint will be the court’s evaluation of Adif’s rebuttal and the potential for further expert testimony to resolve the conflict over the SAM system’s capabilities.

Do you believe technical safety thresholds should be lowered to prevent such tragedies, or are these systems limited by physics? Share your thoughts in the comments below.