Controllers cleared Renfe to accelerate toward stopped Iryo despite clear view, as traffic control errors blamed for deadly Spain train crash

Failure preceded deadly collision

The crash occurred on Wednesday morning on a central rail corridor south of Toledo. It is Spain’s deadliest rail disaster in more than a decade; at least 69 people died, and dozens were hospitalised.

At 8:31am, the LZB automatic signalling network failed. Emergency procedures stopped trains in the sector, leaving two passenger trains in the same track block and requiring Madrid operations staff to coordinate manually with their drivers.

Clearances and warnings

At 8:36am, controllers authorised the rear train, operated by state-owned Renfe, to restart at regular speeds of up to 124mph rather than at the cautionary speed of around 25mph required during signalling outages. At 8:41am, controllers cleared the forward Iryo express train to proceed, turning its signal green. The train suffered a mechanical failure and could not move; at 8:48am, its driver told the Madrid operations centre that the carriages were stalled on the rails.

Why the approaching train continued

The ministry’s timeline says controllers recorded the Iryo driver’s warning but did not stop the Renfe train or withdraw its track authorisation. The clearance for the Iryo train also turned the signal behind it green, leading the Renfe driver to believe the track was clear before the collision.

Puente said controllers had a clear view of events, but said he would not blame individual workers. He said the inquiry must explain why no action was taken when there was time to intervene.

Scrutiny and proposed upgrades

The minister said controllers were working under an emergency manual regime in which basic verification procedures were bypassed. He also said technicians had several opportunities to stop the Renfe train before impact.

The crash has renewed scrutiny of Spain’s railway system after more than 40 people died in a crash in January. Railway unions cite chronic staffing shortages and outdated technology in control rooms; Puente says the Madrid centre had adequate staff and funding.

Minister defends signalling system

Puente said the ageing LZB system had suffered about 170 outages this year, mainly because of cable theft, vandalism and planned maintenance. He said its performance was within normal European parameters ahead of a nationwide upgrade planned for next year.

Facing calls from opposition parties to resign before general elections on 29 November, Puente announced emergency technology upgrades intended to reduce reliance on human decisions in control rooms. A judicial inquiry is investigating the crash.