Este resumen es generado por inteligencia artificial y revisado por la redacción.

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Las grabaciones de las conversaciones entre el centro de control de trenes de Atocha, en Madrid, y los maquinistas de los dos trenes accidentados este miércoles en la provincia de Toledo ofrecen algunas pistas de lo ocurrido.
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El accidente se produjo la mañana de este miércoles, luego de que un fallo informático afectara de manera generalizada la marcha normal de los trenes en una zona situada unos 140 km al sur de Madrid.
Ambos ferrocarriles de pasajeros cubrían la ruta de Madrid a Sevilla. El tren Iryo iba unos kilómetros por delante del AVE cuando se produjo la falla general que detuvo el avance de ambos.
En las grabaciones se escucha cómo, al asumir la gestión de la situación, los operadores de Atocha discutían las acciones a tomar.
Intentaban determinar qué hacer para que los trenes superaran la región de Urda, Toledo, donde falló el sistema de navegación LZB.
El LZB es un sistema de señalización y control continuo que supervisa la velocidad y la posición del tren en tiempo real y puede frenar automáticamente si el maquinista supera los límites de seguridad.
Entonces, en la llamada al maquinista del tren AVE 2080, el controlador le dicta las instrucciones a seguir.
—Maquinista de tren 2080, desconecte y vuelva a conectar el LZB y reanude la marcha al amparo del [sistema de regulación] BSL con marcha normal.
—¿Con marcha normal? —pide el maquinista que reconfirme el operador de Atocha.
—Sí —le responde el operador.
El BSL (Bloqueo de Señalización Lateral) es un sistema de respaldo en el que la separación segura entre trenes se controla mediante las señales situadas junto a la vía.

Una foto aérea que muestra el choque de los dos trenes en España
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Mientras, en la comunicación de Atocha con el tren Iryo 6076, que estaba detenido unos 30 km por delante del AVE en las inmediaciones de Urda, la maquinista le dice al operador del centro de control que no ha podido reiniciar su marcha por una falla de transmisión.
—Desconecte y vuelva a conectar el sistema LZB y reanude marcha al amparo del BSL con marcha normal —le instruye el operador de Atocha a las 08:41.
—Vale, perfecto, pues muchas gracias —le responde la maquinista.
Las instrucciones a ambos maquinistas son similares.
Sin embargo, en otra comunicación posterior, la misma maquinista advierte que no ha podido avanzar. El controlador de Atocha se limita a decirle que avance “en cuanto pueda”.
Son las 08:48 horas. La distancia entre ambos era de unos 30 km, un tramo muy corto si el tren AVE alcanza su velocidad de hasta 200 km/h autorizada para esa zona.
Cinco minutos después se produce el choque por alcance del tren AVE sobre el Iryo.

El ministro de Transportes dice que las decisiones de Atocha le parecieron «inexplicables». (Reuters).
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Las comunicaciones implicarían que el tren AVE 2080 recibió autorización para avanzar aún y cuando el tren Iryo 6076 no había podido reanudar plenamente su marcha y seguía con problemas para reconectarse al sistema de navegación LZB.
Es por ello que, para las autoridades españolas, resulta increíble que se diera este tipo de instrucciones, en lugar de seguir un protocolo diferente para estas contingencias.
“La decisión de retomar la circulación, no habiéndose restablecido el sistema de seguridad, corresponde al centro de control. A través de sus operadores, toma la decisión de reanudar la marcha en unas circunstancias inexplicables”, dijo el ministro Puente.
Según los protocolos, ante la falla del sistema LZB que gestiona las altas velocidades, era necesario aplicar el avance a marcha de seguridad, de un máximo de 40 km/h, el cual permite al maquinista tener a la vista algún obstáculo y tener el tiempo suficiente para evitarlo.
Pero no sucedió así.
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let previousMessagesScrollTop=messages?messages.scrollTop:0;const updateScrollButton=()=>{if(!messages||!scrollBottomButton)return;const currentScrollTop=messages.scrollTop;const hasOverflow=messages.scrollHeight>messages.clientHeight+1;const distanceFromBottom=messages.scrollHeight-currentScrollTop-messages.clientHeight;if(currentScrollTop
const MAX_QUERY_LENGTH=1200;const validateChatQuery=text=>{const normalized=text.trim();if(!normalized)return{valid:false,reason:’empty’};if(Array.from(normalized).length<3)return{valid:false,reason:’min-length’};if(!/[p{L}p{N}]/u.test(normalized))return{valid:false,reason:’no-letters-or-numbers’};if(normalized.length>MAX_QUERY_LENGTH)return{valid:false,reason:’max-length’};return{valid:true,text:normalized};};const getQueryValidationMessage=reason=>reason===’empty’?’Escribe una pregunta para Merlín.’:reason===’min-length’?’Escribe al menos 3 caracteres para que Merlín pueda ayudarte.’:reason===’no-letters-or-numbers’?’Incluye al menos una letra o un número. Puedes usar signos, tildes y emojis.’:’Tu pregunta puede tener hasta 1200 caracteres. Acórtala un poco para enviarla.’;
const characterCounter=widget.querySelector(‘[data-merlin-widget-counter]’);const updateCharacterCounter=()=>{if(status&&!status.hidden)setStatus(»);if(!characterCounter)return;const atLimit=input.value.length>=MAX_QUERY_LENGTH;characterCounter.hidden=!atLimit;if(atLimit)characterCounter.textContent=»Límite alcanzado: «+MAX_QUERY_LENGTH+’ caracteres.’;};input.addEventListener(‘input’,updateCharacterCounter);const closeMenu=()=>{if(!menu||!moreButton)return;menu.hidden=true;moreButton.setAttribute(‘aria-expanded’,’false’);};moreButton?.addEventListener(‘click’,()=>{if(!menu)return;menu.hidden=!menu.hidden;moreButton.setAttribute(‘aria-expanded’,String(!menu.hidden));if(!menu.hidden){const firstMenuItem=menu.querySelector(‘a[href], button’);firstMenuItem?.focus();}});clearButton?.addEventListener(‘click’,async()=>{if(isSending)return;if(messages){messages.replaceChildren(…initialMessages.map(message=>message.cloneNode(true)));messages.scrollTop=0;updateScrollButton();}input.value=»»;setStatus(»);closeMenu();const profile=getAuthProfile();if(profile)markConversationCleared(profile);if(profile&&session){setSendingState(true);try{conversationId=null;loadedConversationId=null;try{socket?.close();}catch(error){}socket=null;socketConversationId=null;conversationId=await createConversation(session,profile);loadedConversationId=conversationId;const context={profile,session};openSocket(context,conversationId).catch(()=>undefined);setStatus(»);}catch(error){setStatus(‘No se pudo limpiar el chat. Intenta nuevamente.’);}finally{setSendingState(false);}}else if(profile){conversationId=null;loadedConversationId=null;}else conversationId=null;input.focus();});
form?.addEventListener(‘submit’,async event=>{event.preventDefault();const validation=validateChatQuery(input.value);if(isSending)return;if(!validation.valid){setStatus(getQueryValidationMessage(validation.reason));input.focus();return;}const text=validation.text;activeReportQuestion=text;activeReportRequestId=String(Date.now());pushAnalytics({event:’merlin_search_query’,search_term:text,query_type:’manual’,query_location:’widget’});setSendingState(true);const requestIdentityGeneration=identityGeneration;let authError=null;const context=await authenticate().catch(error=>{authError=error;setStatus(error instanceof Error?error.message:’No se pudo conectar con Merlín.’);return null;});if(requestIdentityGeneration!==identityGeneration)return;if(!context){setSendingState(false);if(!getAuthProfile()&&!authError)requestPianoLogin();return;}setStatus(»);activeRequestStartedAt=Date.now();shouldFollowResponse=true;activeRequestEntryIds=new Set();lastCompletedResponse=»»;responseAnimationFinished=false;const sentMessage=renderMessage(text,’user’);shouldFollowResponse=true;messages?.querySelector(‘.merlin-widget__message–intro’)?.remove();showThinking(undefined,sentMessage,’smooth’);input.value=»»;try{if(!conversationId)conversationId=await findConversation(context.session,context.profile);if(requestIdentityGeneration!==identityGeneration)return;const timeline=await getTimeline(context.session,conversationId);if(requestIdentityGeneration!==identityGeneration)return;activeRequestEntryIds=new Set(timeline.map(entry=>entry&&entry.id).filter(Boolean));saveCachedHistory(context.profile,conversationId);await devrevFetch(context.session,’/timeline-entries.create’,{method:’POST’,body:JSON.stringify({object:conversationId,type:’timeline_comment’,body:text})});if(requestIdentityGeneration!==identityGeneration)return;const deadline=activeRequestStartedAt+RESPONSE_TIMEOUT;let completedEntry=null;let pollInterval=RESPONSE_POLL_INTERVAL;while(Date.now()
input.addEventListener(‘keydown’,event=>{if(event.key!==’Enter’||event.shiftKey||event.isComposing)return;event.preventDefault();if(form&&typeof form.requestSubmit===’function’){form.requestSubmit();}else if(submit){submit.click();}});menu?.querySelector(‘a[href]’)?.addEventListener(‘click’,closeMenu);document.addEventListener(‘click’,event=>{const target=event.target;if(target instanceof Node&&menu&&moreButton&&!menu.contains(target)&&!moreButton.contains(target)){closeMenu();}});dialog.addEventListener(‘cancel’,event=>event.preventDefault());dialog.addEventListener(‘keydown’,event=>{if(event.key===’Escape’){event.preventDefault();if(menu&&!menu.hidden){closeMenu();moreButton?.focus();}return;}if(event.key!==’Tab’)return;const focusable=Array.from(dialog.querySelectorAll(‘a[href], button:not(:disabled), textarea:not(:disabled)’)).filter(element=>!element.closest(‘[hidden]’));const first=focusable[0];const last=focusable[focusable.length-1];if(event.shiftKey&&document.activeElement===first){event.preventDefault();last.focus();}else if(!event.shiftKey&&document.activeElement===last){event.preventDefault();first.focus();}});dialog.addEventListener(‘close’,()=>{trigger.setAttribute(‘aria-expanded’,’false’);trigger.setAttribute(‘aria-label’,’Abrir chat con Merlín IA’);closeMenu();trigger.focus();});});};if(document.readyState===’loading’){document.addEventListener(‘DOMContentLoaded’,initializeWidgets,{once:true});return;}initializeWidgets();})();
(()=>{const tooltip=document.querySelector(«[data-merlin-widget-tooltip]»);const widget=document.querySelector(«[data-merlin-widget]»);const trigger=widget?.querySelector(«[data-merlin-widget-trigger]»);const closeButton=tooltip?.querySelector(«[data-merlin-widget-tooltip-close]»);if(!tooltip||!trigger||!closeButton||tooltip.dataset.initialized)return;const start=Number(tooltip.dataset.start);const end=Number(tooltip.dataset.end);const stateKey=window.location.pathname+»|story»;const existingState=window.__MERLIN_TOOLTIP_STATE__;const state=existingState?.key===stateKey?existingState:{key:stateKey,presented:false,dismissed:false};if(existingState?.tooltip&&existingState.tooltip!==tooltip){existingState.tooltip.dispatchEvent(new Event(«merlin-tip-destroy»))}state.tooltip=tooltip;window.__MERLIN_TOOLTIP_STATE__=state;tooltip.dataset.initialized=»true»;const globalDismissKey=»ec-merlin-tutorial-dismissed»;let userDismissKey=»»;let destroyed=false;let dismissed=state.dismissed||tooltip.dataset.dismissed===»true»;let presented=state.presented||tooltip.dataset.presented===»true»;let activeTrigger=null;let presentationTimer=null;let frame=0;let scheduleTimer=null;const mediaQuery=window.matchMedia(«(min-width: 1024px)»);const listeners=[];const clamp=(value,min,max)=>Math.max(min,Math.min(value,max));const listen=(target,eventName,handler,options)=>{target.addEventListener(eventName,handler,options);listeners.push(()=>target.removeEventListener(eventName,handler,options))};const hasCookie=key=>{try{return document.cookie.split(«;»).some(cookie=>cookie.trim()===key+»=1″)}catch(_error){return false}};const hasStorageValue=key=>{try{return window.localStorage.getItem(key)===»1″}catch(_error){return false}};const isDismissed=()=>hasStorageValue(globalDismissKey)||hasCookie(globalDismissKey)||Boolean(userDismissKey&&(hasStorageValue(userDismissKey)||hasCookie(userDismissKey)));const persistDismissal=()=>{const keys=userDismissKey?[globalDismissKey,userDismissKey]:[globalDismissKey];keys.forEach(key=>{try{window.localStorage.setItem(key,»1″)}catch(_error){}try{document.cookie=key+»=1; Path=/; SameSite=Lax; Max-Age=31536000″}catch(_error){}})};const hideTooltip=()=>{tooltip.hidden=true;tooltip.classList.remove(«merlin-widget__tooltip–visible»,»merlin-widget__tooltip–above»);if(activeTrigger)activeTrigger.removeAttribute(«aria-describedby»);window.clearTimeout(presentationTimer);presentationTimer=null};const isCampaignActive=()=>!destroyed&&!dismissed&&Number.isFinite(start)&&Number.isFinite(end)&&Date.now()>=start&&Date.now()
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