At least 69 people died on 28 October after a Renfe train rammed an Iryo train from behind in Spain.
The crash occurred approximately 140km south of the capital.
Iñaki García described the experience of the impact, saying, "You don't know what's happening, you don't know what has happened, you just know that you're being thrown around in a matter of seconds."
Rosa María Domínguez claimed the scene resembled "a horror film." A sports hall in Urda was converted into a makeshift hospital to treat the injured. Pedro Sánchez visited the crash site twice.
Alberto Núñez Feijóo visited Urda on Thursday and said, "The Spanish people need answers. They are wondering what is happening to high-speed rail in their country." Óscar Puente suggested that a computer failure followed by human error likely caused the collision.
Vicente Almenar noted that the entire procedure failed because it was unknown what a colleague was seeing on the screen, adding, "They always look for the last link in the chain, where it's weakest, but here the entire procedure failed because we don't even know what our colleague was seeing on the screen." The rail company Semaf called a strike for Thursday and described the leak of audio recordings as irresponsible and slanted.
A demonstration took place on Wednesday night to protest the government's management of the rail network. Spain is observing three days of mourning following the tragedy. Most political parties have suspended their campaigning ahead of the polls in exactly one month, with the exception of the far-right Vox.
A previous collision on the Madrid-Seville route in Adamuz killed 46 people nine months ago.
