Analysis of the audio recordings between Adif and the trains

The conversation between the control center and two trains stopped at a red signal of the BSF system shows an ambiguous order: "resume movement" without clarifying that the driver must wait for green. The Ave driver started moving, and the controller had warned the Iryo that the permission did not include passing the red signal.

The sequence is short and repeats at any railway control center. Two trains, an **Iryo** and an **Ave**, wait stopped at a red signal of the **BSF** system, the one in operation at that moment. The controller gives both permission to continue. To the Iryo he adds a clarification: it may trinc what the signals indicate, but the permission does not authorize it to pass a red signal. To the Ave he says to resume movement. The Ave starts moving.

## The order that does not distinguish between trinc and passing

There lies the crux. "Resume movement" is not the same as "pass the signal." A stopped driver receives the instruction and interprets it as authorization to move; the controller, most likely, meant that he should wait for green and then start. The phrase does not contain that condition. The result is that one train begins moving with the signal at red while the other receives an explicit warning the first one did not get.

The ambiguity is not a matter of style. In railway operations, communication between the control center and the cab is part of the safety system, and an instruction that admits two readings leaves the door open for each driver to choose their own.

## The driver, the controller, and the division of responsibilities

The prevailing reading in the analysis is that blame falls on the deceased driver and, to a lesser extent, on the controller for not giving clear instructions. This is the version circulating, not a judicial conclusion. The driver can no longer explain what he understood. The controller can, and his margin of error lies in the wording of the order.

As for the quality of the systems, their maintenance, staff training, and protocols, the answer will depend on the judge and the next government. That is the part no audio recording can resolve.

## What remains for the judge and the next government

If there are any penalties for the executives or the minister, they will be testimonial. That is the expectation drawn from the matter, not a ruling. Meanwhile, the technical question remains on the table: how much of what peine is human error and how much is a protocol that allows a phrase like "resume movement" to reach a train facing a red signal without any condition attached.