Madrid Metro Line 11 Launches EUR 880M Tunneling Extension

MADRID, SPAIN – The Community of Madrid has initiated tunneling for the extension of Metro Line 11, a project with an announced investment of EUR 880 million. A ceremony on 26 March marked the launch of a tunnel boring machine (TBM) for the first phase, which will ultimately form part of a 33 km diagonal line connecting the city’s southwest with the northeast.

What Is the Full Scope of This Project?

The full project will create a 33 km line linking Cuatro Vientos with Valdebebas, creating a new diagonal axis across the Madrid Metro network. The current works are divided into two primary sections: a southern extension from Plaza Elíptica to Conde de Casal and a northern extension from Mar de Cristal to Valdebebas. The TBM, launched at the future Comillas station, will excavate a 5.6 km tunnel towards Conde de Casal, adding five new stations and connecting with existing lines at Palos de la Frontera, Atocha, and Conde de Casal. The northern section will add 8 km of track and five more stations, providing crucial links to IFEMA, the future City of Justice, and Terminal T4 of the airport.

Key Project Data

How Does This Compare to Similar Projects?

The project’s estimated cost efficiency appears high compared to other major European metro extensions. Based on the announced EUR 880 million investment for the combined southern and northern sections (approximately 13.6 km), the cost is roughly EUR 65 million per kilometre. In contrast, the complex central section of Barcelona’s Line 9/10 project has costs that have exceeded EUR 300 million per kilometre, while London’s 3.2 km Northern Line Extension cost over EUR 400 million per kilometre. The total final budget for the entire 33 km Madrid Line 11 project was not disclosed.

Editor’s Analysis

This extension is a strategic infrastructure investment designed to reshape Madrid’s mobility patterns by creating a new city-spanning axis. The focus on connecting major economic hubs like IFEMA, the airport, and the future City of Justice directly to residential areas is a clear effort to boost economic productivity and property values along the corridor. This aligns with a global trend where transit authorities use data-driven network expansions to improve job accessibility, a strategy also employed by the Washington Metropolitan Area Transit Authority to connect more residents with employment centers (Source: GovTech, 2024).

FAQ

Q: Which key locations will the new Line 11 extension serve?
A: The full extension will connect numerous key destinations, including the high-speed rail hub at Atocha, IFEMA Madrid, the future Ciudad de la Justicia de Madrid, Hospital Enfermera Isabel Zendal, and Terminal T4 of Adolfo Suárez Madrid-Barajas Airport.

Q: What is the timeline for the different parts of the extension?
A: The northern extension, connecting Mar de Cristal with Valdebebas, is scheduled for completion in 2031. A specific completion date for the southern section currently under construction between Comillas and Conde de Casal has not been announced.

Q: How does the TBM used in this project work?
A: The tunnel boring machine excavates the tunnel at an average rate of 15 metres per day. As it moves forward, it simultaneously installs the permanent tunnel lining, which consists of rings made from seven prefabricated concrete segments each.