Construction on Athens Metro Line 4 is progressing at a fast pace, with the tunnel boring machine (TBM) that began work on Katechaki Avenue expected to reach Evangelismos Station (Line 3) by late 2025, authorities said. Nearly half of the tunnel section – about 3 kilometers – has been completed, with the TBM drilling approximately 10 meters per day and pausing at each new station for maintenance.
A second TBM, currently in Galatsi, has completed nearly 800 meters of its corresponding tunnel and is expected to reach Evangelismos by the end of 2026.
The €1.5 billion project, Greece’s largest ongoing public works initiative, will add 15 underground stations spanning 13 kilometers: Alsos Veikou, Galatsi, Elikonas, Kypseli, Dikastiria, Alexandras, Exarchia, Akadimia, Kolonaki, Evangelismos, Kaisariani, Panepistimioupoli, Ilissia, Zografou, and Goudi. The contractual timeline for completion is eight years from the signing of the concession.
The project includes a new Operations Control Center, which will have the capacity to integrate control functions for Lines 1, 2, and 3, as well as future automated tram systems. A new maintenance and repair facility for the metro expansion is also planned in Sepolia, at the current terminal.
As part of the project, 20 new Alstom Metropolis trains will be added to the tram network. Like the newly-inaugurated Thessaloniki metro, these will be Athens’ first fully automated, driverless trains, operating remotely from the Operations Control Center.
The new line is expected to serve 340,000 passengers daily, while reducing car traffic by 53,000 vehicles per day and cutting carbon emissions by 318 tons daily. Additionally, it is projected to save 1,216 MWh of energy per day.
The Building Information Modeling (BIM) platform is being introduced to Greece for the first time through Line 4’s construction, supported by the EU’s Recovery Fund. The technology aims to streamline coordination between planners and builders, improve implementation, and significantly reduce final costs. [AMNA]
