There are investments and investments. More or less necessary. More or less large. But there are also more or less viable ones. And, of course, the Ministry of Transport considers that the European Commission’s proposal to change all roads from Iberian gauge to international gauge is anything but viable. And they have a good reason: 30,000 million euros.
What does Europe want? In October 2025, The European Commission presented its project to cement, once and for all, the connection between Madrid and Lisbon with high-speed trains. After many delays, if the plans are fulfilled and both cities end up being united in 2030 with a single train, high speed will arrive on this line 20 years late.
In the writing The bases that the routes must follow are reflected and there is an important paragraph in them:
With the ambition to fully integrate the Lisbon–Madrid high-speed rail connection into the broader high-speed network in Spain and France, adopting the European standard nominal gauge of 1,435 mm is a key step. In this way, the competitiveness of long-distance passenger traffic will be strengthened. By connecting Portugal and Spain, and extending to France, the Lisbon–Madrid high-speed rail connection has a clear cross-border and Union dimension
In it it is clear that we are talking about the Madrid-Lisbon line but on the occasion of this text, public entities must study the economic viability of migrating the railway network to the international gauge and definitively abandoning the Iberian gauge.
The answer. No. Simple and concise. According to The Countrya medium that claims to have had access to internal documents of the Ministry of Transportation, the Government’s response to this migration is a resounding “no.” The reasons are as simple as that it would take 30 years of works and an investment of 30,000 million euros to reverse the Iberian exceptionalism of the Spanish and Portuguese train.
In the documents that Spain will present to Brussels, it is specified that the matter is not viable in its entirety or in part since the possibility of installing “third threads or lanes to achieve mixed widths” was contemplated, they explain in the medium.
No, no and no. They explain in The Country that the Ministry of Transportation rejects all the options that have been put on the table:
- Changing exclusively the lines of the European corridors: it would leave, according to Transport, more than 5,000 km of the network isolated.
- Implement a mixed width with third rails or threads: discarded due to the complexity of the work and the high maintenance cost
- Change all Iberian gauge roads: Transport considers it unapproachable although it has been the most studied option because it is ideal.
What is this track width? Spain, since the 19th century it has lived in an Iberian exceptionality next to Portugal. Throughout this century, the railway was gaining followers all over the world. During its expansion, the lines were built with different track widths, taking into account the particularities of the terrain.
In Europe, the number of tracks built with a width of 1,435 mm multiplied and ended up becoming established. Everything above it is considered “wide gauge” and below it as “narrow gauge” because those 1,435 mm were accepted as the standard. This is how the international gauge was born.
In Spain, however, we chose to build our railway network on a track gauge of 1,672 millimeters, defended by three engineers who were entrusted with the task of projecting the future of the Spanish train. They argued that a wider track width allowed the use of more powerful locomotives and that this was essential in a mountainous country like ours.
And the consequences? The consequences were immediate. Already in the middle of the 19th century From Portugal they asked Spain by letter to desist from building their roads with this new gauge because they would be isolated from Europe. And the problem, evidently, was greater for Portugal, which was dragged along by the Spanish decision.
Spain, as you imagine, did not give up and now lives between three gauges of road: the international one (for about 4,000 km of high speed), the Iberian one (for 13,000 km of Cercanías) and the metric width (1,210 km for especially mountainous terrain). This is a problem for connectivity between tracks because trains cannot jump from one to another, except for the Talgo Avril.
And it’s an advantage. At least for Renfe. And Renfe can take advantage of this particularity in some very specific points on the Peninsula. For example, in Madrid-Galicia, international gauge and Iberian gauge are used, already in the Galician part. Only Renfe has trains that can jump from one track gauge to another, so competition is eliminated.
And the same will happen in Portugal. The connection between Madrid and Lisbon is being built on an international gauge but the Portuguese high-speed line between Lisbon and Porto will operate on an Iberian gauge. This leaves Renfe as the only company that could operate a Madrid-Porto train passing through Lisbon without the need to transfer.
Now it is better understood why Renfe will invest in converting the Avrils fixed gauge on variable gauge trains and why Transportes believes that Portugal is a great market opportunity.
Photo | Falk2
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