The audio recordings of the Urda train accident reveal the order to the AVE to continue with "normal running" and the Iryo warning before the collision

The usual procedure is to keep trains separated through the block system: if a train occupies a protected section, another cannot normally enter that same section until it is free. This does not mean stopping the entire line: other trains can run on different sections, as long as safety conditions are maintained.

The reference for the General Interest Railway Network is the Railway Traffic Regulations, approved by Royal Decree 664/2015. It is important to distinguish between normal occupation — a train moving or stopped before a signal — and immobilization due to a failure requiring assistance.

1. Separation through blocks

The track is organized into block sections, segments in which, under normal conditions, there cannot be more than one train simultaneously. Article 4.1.1.2 establishes two principles: trains traveling in the same direction must maintain a distance that prevents overtaking, and no train should be dispatched in the opposite direction on the same track from the adjacent station.

Therefore, one train can follow another along a line, but normally cannot occupy the same block section. The separation depends on the block system and existing installations, not on a universal time interval.

2. Holding the next train

In automatic block systems, to dispatch or allow a train to proceed, article 4.2.1.2 requires that the block section be free, that the exit route be set, and that the corresponding movement order be given. Additional conditions of the installed block type must also be met.

Until these conditions are met, the next train must obey the indications of signals or the cab signaling system. The presence of a train ahead does not authorize freely approaching it, even if it is visible.

3. Management from stations or centralized control

Traffic management corresponds to the infrastructure administrator, through the competent traffic manager. It can be exercised from stations or from the Centralized Traffic Control, which remotely governs signals, blocks, and other elements.

At stations, interlockings also intervene: systems that link signals and track devices to establish safe routes. They prevent authorizing incompatible routes and changing certain devices while the route remains authorized. Thus, traffic management is not only about ordering a train to wait.

4. Resumption when the section is free

Subsequent circulation can proceed when the applicable block, route, and movement authorization conditions are met. Protection equipment, such as ASFA, ERTMS, or LZB, complement signaling with various functions of information, supervision, or braking.

There is no single reduced speed simply because there is another train ahead. The driver must comply with the corresponding orders and limits. Signal overruns ordering a stop require the applicable regulatory procedure; they do not equate to a general authorization to enter an occupied track.

5. If the train is broken down and requests assistance

Article 3.6.3.1 provides that, upon receiving the request for assistance, the traffic manager will not dispatch trains on the affected track and will inform the corresponding responsible parties. The stopped train cannot resume movement without express authorization.

The control center coordinates the aid. Before sending assistance means, it is verified that the route to the indicated point is free of other trains. Approaching the immobilized train is done under specific instructions: it is an exceptional operation, different from ordinary circulation.

The Minister of Transport has powers of political direction, regulation, and coordination of the state railway sector, but does not concentrate all decisions in the event of an incident. Legislation distinguishes between operational traffic management, safety supervision, emergency response, and technical investigation: leading the Ministry does not mean replacing those responsible for each function.

1. Political direction and regulatory authority

Article 4 of the Law 50/1997, of the Government establishes that ministers have "competence and responsibility in the specific sphere of their action." They are responsible for developing governmental action in their department, exercising regulatory authority, and other powers conferred by the rules.

In the face of railway incidents, this framework allows the minister to promote the response of their department and necessary reforms within their competencies. It does not allow altering what is established by law through a ministerial order nor automatically assuming technical functions attributed to another body.

2. Coordination and system monitoring

Article 5 of the Royal Decree 253/2024 assigns the Directorate General of the Railway Sector the coordination between the infrastructure administrator and operators, under supervision of the State Secretariat. It also tasks it with assisting the latter in evaluating effectiveness and technical control of the attached administrators.

Therefore, ministerial coordination is exercised through a structure of senior and managerial bodies, not necessarily through the minister's personal decisions on each incident. The regulation must be read with its subsequent amendments, including Royal Decree 690/2025.

3. Safety: differentiated supervision from operation

The Law 38/2015, of the railway sector, and Royal Decree 929/2020 establish a division of responsibilities. Safety supervision and inspection correspond to the State Railway Safety Agency; administrators and railway companies retain their management responsibilities.

The Ministry also has preventive functions: planning development, maintenance, and renewal of the network and preparing annual safety plans. These powers allow guiding improvements after an incident but do not make the minister the technical authority to authorize each circulation or decide each operational measure.

4. Emergencies and passenger assistance

The Railway Sector Law obliges passenger transport companies to establish properly coordinated emergency plans to provide assistance when there is a serious service disruption. The operational obligation thus falls on the companies, without excluding the Ministry's institutional coordination.

Additionally, Royal Decree 929/2020 expressly differentiates operational safety from civil protection and public safety, which have their own regulations. The direction of the railway sector should not be confused with general command over all emergency services.

5. Independent investigation and accountability

The minister cannot determine the conclusions of the technical investigation. Law 2/2024 creates an independent administrative authority, whose statute is approved by Royal Decree 141/2026, with transitional provisions regarding previous commissions. The purpose is to clarify causes and prevent new accidents, not to establish guilt: this separation is already stated in Royal Decree 623/2014.

Finally, the minister may appear to explain their management and must attend parliamentary control mechanisms. Articles 202 and 203 of the Congress Regulations regulate these appearances. Political responsibility and the obligation to inform do not equate to directing the independent investigation.

In Spain, to resume movement after a technical incident, two conditions must be met: that the train can circulate safely and that the movement is permitted according to circulation rules. That the failure seems resolved is not enough if a restriction remains in force, the movement order has been invalidated, or assistance has been requested.

The following explanation refers to the General Interest Railway Network. Specific checks and authorizations depend on the failure, the stopping location, and the signaling system used.

1. Applicable regulations

The main operational reference is the Railway Traffic Regulations, approved by Royal Decree 664/2015, with its amendments. It regulates movement orders, failures, assistance, braking, and failures of safety installations.

The framework is completed by the Railway Sector Law and Royal Decree 929/2020, on operational safety and interoperability. Additionally, the royal decree approving the Regulations requires administrators and railway companies to incorporate procedures to apply it into their safety management systems.

2. Check technical conditions

Before restarting movement, the procedure corresponding to the anomaly must be applied. There is no single functional test required for any incident: verifications depend on the affected element and applicable safety procedures.

It is important to distinguish between recovering normal circulation and continuing under special conditions. For example, a signaling failure may require an overrun authorization; a faulty level crossing requires specific protection measures. A circulation authorization alone does not prove that a material failure is repaired.

3. Have a valid authorization

• Invalidated movement order. According to article 1.5.1.9, if a stopped train cannot depart immediately after receiving it, the order is invalidated. If it has not passed the departure signal or the corresponding block, it must receive a new order; if it has passed them, resumption must be notified or a reversal ordered.
• Assistance requested. Article 3.6.3.1 states: "the Driver may not resume movement until expressly authorized by one of the Traffic Managers of the adjacent stations or the CTC." This prevents unilateral departure even if the failure disappears.
• Authorized reversal. If the cause disappears and forward continuation is intended, article 3.6.2.4 requires canceling the reversal and authorizing resumption through the regulatory exchange of telephone calls and the planned checks.

4. Respect restrictions and communications

The driver must comply with notified conditions and signals. According to article 1.5.1.10, if several speed limits apply, the most restrictive must be observed. There is no universal reduced speed for any resumption.

Communications must take the form required for each case, including regulatory telephone calls. An informal conversation should not be confused with the specific required authorization. For example, in the case of a faulty level crossing, article 5.2.6.2 requires stopping before crossing and receiving authorization with crossing conditions.

5. Distribution of responsibilities

The driver executes actions and complies with movement conditions; the traffic manager manages authorizations and traffic protection; and the railway company applies its safety procedures over train operation. The decision requires coordinating technical fitness with operational authorization: neither substitutes the other.