Madrid Metro TBM Mayrit Hits Palos de la Frontera Early 2026

The Madrid Metro Line 11 expansion has reached a major milestone as the tunnel boring machine (TBM) named Mayrit broke through at the future Palos de la Frontera station on Friday, a month ahead of schedule. This second breakthrough marks significant progress on one of Madrid's most ambitious infrastructure projects in decades.

The Mayrit TBM, which began its journey from Comillas station in Carabanchel on March 26, has excavated a continuous 2,732-meter tunnel in just 147 days. The machine has installed 1,606 rings of segmental lining and removed approximately 189,000 cubic meters of earth, according to figures published by El Debate.

Mayrit TBM Sets Strong Pace in Madrid Metro Expansion

In its latest stretch between Madrid Río and Palos de la Frontera, the machine advanced at an average rate of about 22.8 meters per day. This is a notable improvement from its initial pace of around 15 meters per day in March, demonstrating the TBM's growing efficiency as it navigates the Madrid subsoil.

Miguel Núñez, Director General of Infrastructure for the Community of Madrid, attributes the improved performance to the machine and the terrain behaving "extraordinarily well." This positive interaction between the TBM and geological conditions has allowed the project to gain momentum.

Line 11 Expansion: A Transformative Project for Madrid

Once completed, the Line 11 extension will run diagonally across Madrid, connecting Cuatro Vientos in the southwest to Valdebebas in the northeast. This new diagonal route will significantly reduce travel times and provide a new option for thousands of residents.

The project is one of the most ambitious undertakings Madrid has seen in decades, reflecting the city's commitment to enhancing public transportation and supporting sustainable urban mobility.

Key Achievements of the Mayrit TBM

• 2,732 meters of tunnel excavated in 147 days.
• 1,606 rings of segmental lining installed.
• 189,000 cubic meters of earth removed.
• 22.8 meters per day average advance rate in the latest stretch.
• One month ahead of schedule at Palos de la Frontera.

Comparison of TBM Performance

What This Means for Madrid's Metro Future

The early arrival at Palos de la Frontera is a positive sign for the entire Line 11 expansion. It suggests that the project could continue to advance ahead of schedule, potentially bringing improved connectivity to Madrid residents sooner than planned. The background to this story is set out in Science: latest articles.

The success of the Mayrit TBM also highlights the importance of modern tunneling technology in executing complex urban infrastructure projects. As the machine continues its journey, further milestones are expected, bringing the city closer to a more integrated and efficient metro network. A related thread runs through Calais Migrant Camps: Life Harsher a Decade After Jungle Demolition. Earlier coverage in Madrid Metro TBM Mayrit Hits Palos de la Frontera Early shows how the argument developed.