Ten percent. That is the share of the trans-European rail network equipped, by the end of 2024, with the common signaling system that the European Union began deploying more than twenty years ago. Europe is investing in rail interoperability, but the coordinated deployment of trackside and onboard equipment remains too slow. The still-coexisting national systems can impose multiple onboard equipments and reduce the benefits of an interoperable network, fragmenting investments at borders rather than integrating them into a shared infrastructure.
The essentials
- By the end of 2024, ETCS, the European train control system, covered 10% of the trans-European network, approximately 12,400 kilometers, according to the European Commission.
- The gap between member states is striking: Belgium has equipped 82% of its network, Germany only 2%.
- Only 19% of Europe’s locomotive fleet can use this system. The low equipment level of rolling stock limits the realization of ERTMS benefits when trackside and onboard equipment are not synchronized.
- Some European aid did include an ETCS obligation, but this conditionality was not always targeted at priority cross-border corridors and sections.
- The Commission published a third work plan in February 2026 that maintains the equipment obligation, but without an effective penalty mechanism to date.
Twenty years to cover 10% of the network
The idea of equipping European trains with a common language dates back to the 1990s. The European rail traffic management system, known by the acronym ERTMS, of which ETCS is the trackside and onboard control component, was meant to allow a train departing from Lisbon to reach Tallinn without its driver changing cabs or the operator negotiating technical interoperability at each border crossing. The ambition was clear. The execution is far less so.
In 2024, approximately 12,400 kilometers of lines are equipped, according to the European Commission. The trans-European rail transport network, the priority mesh that Brussels designated as the continent’s backbone, covers approximately 120,000 kilometers. Deployment has therefore progressed, but remains marginal in proportion. Twenty years of institutional efforts, European regulations, and public funding have covered only one tenth of the path defined as priority.
This raw figure conceals another fracture: the equipment installed does not form a continuous corridor. A Belgian section equipped borders a German section that is not. ETCS covers approximately 10% of the TEN-T network, but this deployment is uneven and does not yet guarantee cross-border continuity. This discontinuity severely limits interoperability benefits and often requires additional national equipment.
The Belgian-German gap, symptom of a governance problem
By the end of 2024, Belgium had equipped approximately 79% of its TEN-T network with ETCS. Germany had approximately 3% of its TEN-T network equipped with ERTMS/ETCS, or 445 km. These two figures placed side by side say something precise about the nature of the problem: it is not technical. The same European standards apply to both countries. The same European funding is available.
Official sources attribute delays to deployment difficulties and call for reinforced coordination and funding. The problem contains dimensions of financing, governance, operations, and coordination, beyond purely technical issues.
Germany illustrates a structural difficulty. Its rail network is dense, old, and managed by Deutsche Bahn, an operator under chronic financial strain. ETCS deployment competes with other priorities: modernization of tracks, electrification of regional lines, punctuality of domestic traffic. The German infrastructure manager had to arbitrate between these priorities and equipping cross-border links. The result: Germany, a central country traversed by several corridors, had equipped only approximately 3% of its TEN-T network with ETCS by the end of 2024.
Belgium presents the inverse case. A small territory, dense with international traffic, it had an interest in equipping early and widely: its rail revenues depend on transit. Geography and national political economy produced a result that European incentives alone would not have sufficed to create.
This divergence reveals a coordination and targeting problem with European funding: ETCS deployment progressed unevenly according to national priorities, without systematic coordination at borders. Funds from the Europe Connecting Mechanism, the European program dedicated to infrastructure, have supported hundreds of rail projects. ETCS was mandatory for certain Union-funded infrastructure projects involving new installation or modernization of the control-command subsystem, but this obligation was insufficient to ensure coordinated deployment at borders. States prioritized distinct national priorities, which fragmented deployment.
Rolling stock: the other half of the problem
Trackside infrastructure is one side of the problem. Rolling stock is the other. By the end of 2024, only 19% of European locomotives and railcars were equipped with the onboard system compatible with ETCS. A train can circulate on an ETCS-equipped line only if its cab has the corresponding reception module.
Equipping a line without equipping the trains that run on it, or equipping trains without having corresponding lines, amounts to building a highway without cars capable of driving on it at the right speed. Both deployments must progress together, which has not been the case. Rail operators have largely invested in hybrid rolling stock capable of operating with multiple old national signaling systems. This choice was rational on a company scale, as they could not risk the infrastructure falling behind. The slowdown is associated with several factors, notably funding, capacities, existing systems, onboard equipment, public procurement, and cross-border coordination.
Rolling stock procurement has remained national. Each operator negotiated with manufacturers according to its own specifications, with delivery times extending over decades. Renewing a rail fleet takes between twenty and thirty years under normal conditions. Without a European requirement for ETCS equipment in public procurement calls, some orders placed in recent years have maintained expensive hybrid equipment rather than accelerating standardization.
The third work plan: scope and limits
In February 2026, the European Commission published its third ERTMS work plan. The document recalls the equipment obligations legally imposed on member states by the TEN-T regulation. It explicitly acknowledges that deployment is progressing, but insufficiently. The formulation adopted by the Commission is unambiguous: “more must be done.”
This plan is not without merit. It identifies priority links, establishes indicative timelines, and provides for annual monitoring of progress by member state. These transparency tools have real value: they make delays visible, creating political pressure that the absence of data made impossible.
But the plan does not provide for automatic financial penalties specific to non-compliance with the ERTMS schedule. There is no automatic financial penalty specific to ETCS, but legally binding obligations and general mechanisms for monitoring compliance with EU law exist, notably through infringement procedures and the Court of Justice. The Commission maintains the equipment obligation, but without means of sanction directly linked to delays observed.
A planning document without financial conditionality is scarcely sufficient to narrow the gap between Belgium and Germany before 2030. The first plan, published in 2009, aimed for advanced deployment on priority corridors before 2015. The second, in 2017, postponed deadlines. The third maintains the ambition without transforming incentives.
Condition funds or remain at 10%
The debate opening for the next European budgeting programming period, beyond 2027, concerns precisely this conditionality. Two trajectories are emerging, and they produce very different results for European freight and passengers by 2030.
In the first trajectory, the Union conditions its rail funding on prior ETCS equipment of cross-border sections identified as missing links. A state requesting European funds to modernize a line must first guarantee continuity of the signaling system at this section’s borders. This logic is not unfamiliar to European policy: the cohesion fund already conditions certain transfers on structural reforms. Applying it to rail interoperability would be an extension of this principle to a field where coordination is objectively necessary for investment to be useful. This scenario could narrow the gap between member states and improve technical continuity of cross-border corridors.
In the second trajectory, each state continues to prioritize its major national lines according to its own arbitrations. European funds finance national modernizations. ETCS coverage progresses slowly and equipment remains fragmented at borders. International freight, which represents an essential part of transport decarbonization in Europe, continues to run into technical breaks at borders. A freight train crossing Europe must change signaling systems, sometimes locomotives, multiple times.
This operational cost keeps road competitive against rail on continental corridors, which directly contradicts European climate objectives.
Transport decarbonization depends in part on shifting freight from road to rail, as data on global commerce and its externalities show. Technical discontinuity reduces the attractiveness and competitiveness of cross-border rail freight.
Signals that would allow distinguishing the trajectories
Two indicators will allow us to know, in the coming years, which trajectory Europe is truly on.
The first is the percentage of the trans-European network equipped with ETCS, measured annually by the Commission with a breakdown by member state. If Germany exceeds 5% before 2028, it is a signal that something has changed in national priorities or European incentives. If the figure stagnates below 5%, the second trajectory is underway.
The second indicator is more demanding: the number of cross-border corridors where ETCS continuity is assured without technical breaks. A country can equip 20% of its network by choosing its most nationally profitable lines, without touching border links. The corridor continuity indicator measures actual interoperability, not isolated national equipment. It is what will say whether investment produces a network or a collection of segments.
The Commission tracks this data. Transport & Environment, an independent organization following European rail infrastructure, publishes annual assessments allowing cross-referencing of official figures with external analysis. These publications constitute the most accessible dashboard for tracking the actual trajectory, similar to what enhanced accounting systems are beginning to produce for other public assets.
Rail governance: what Europe can still decide
European rail policy has succeeded in imposing competition opening, separating infrastructure managers from operators in most member states, creating a single railway area in law. It has not succeeded in imposing effective technical interoperability. The gap between the legal framework and the physical reality of the network is the blind spot of twenty years of rail policy.
Bridging this gap does not require new regulations. The obligations exist. What is needed is a mechanism to make them financially binding. This can take several forms: conditioning Europe Connecting Mechanism funds on cross-border link equipment, creating a governance mechanism that imposes a schedule with penalties for non-compliance, or publishing annually a map of technically continuous corridors to make delays politically visible.
None of these avenues is technically complex. They are politically difficult because they limit member states’ sovereignty over their domestic investment choices. The question for the next European mandate is whether the Commission is ready to take this step, or whether a fourth work plan will suffice to justify a further ten years at 10%.
Sources
- European Commission, Directorate-General for Mobility and Transport, Third ERTMS Work Plan, ERTMS deployment progressing, more must be done, February 2026: https://transport.ec.europa.eu/news-events/news/third-ertms-work-plan-ertms-deployment-progressing-more-must-be-done-2026-02-23_en
- Transport & Environment, Tracking Europe’s Rail Infrastructure, 2025 (no link, report available on the Transport & Environment website)
