The new Topo line in Donostialdea will offer nearly 300 daily services, with a frequency of 7.5 minutes across eleven stations between Añorga and Pasaia, including three new stations: Amara, Bentaberri, and Kontxa-Zentroa. The new service will launch on November 21st, following the completion of works by Euskal Trenbide Sarea (ETS).
These metro-like frequencies, currently concentrated in the eastern part of Donostialdea (between Amara and Pasaia), will extend to the western part of the metropolitan area, doubling the train service. Once the through-line is operational, Euskotren plans to run 276 daily services on the common Añorga-Pasaia section to complement weekday service.
This service improvement is made possible by eliminating the dead-end at the surface-level Amara station. The construction of the underground through-line creates a continuous line, offering a seamless service between the western (Matiko, Zumaia) and eastern (Pasaia, Irun, Hendaia) termini.
Susana García Chueca, the Minister of Sustainable Mobility, explained that "Euskal Trenbide Sarea is finalizing the three new stations and Euskotren is completing the training of 197 drivers, so the countdown is underway. The new Topo service, with its new frequencies and stations, responds to the current and future mobility needs of San Sebastián and its metropolitan area, and will be very useful on a daily basis".
To organize different origins and destinations, Euskotren will rename its lines: E1 Matiko (Bilbao)/Zumaia – Pasaia, T0 Añorga – Pasaia, and T1 Lasarte Oria – Irun/Hendaia.
The increase in frequencies will not be limited to weekdays. The opening of the 4.2-kilometer underground through-line will also bring significant improvements to the weekend service. For instance, the E1 Zumaia-Pasaia service will double to every 30 minutes year-round (except Sunday mornings, every 60 minutes). On the T0 Añorga – Pasaia section, there will be a train every 7.5 minutes (except Sunday mornings, 15 minutes). Weekend frequency on the T1 Lasarte Oria – Irun section will be 15 minutes.
The increase in frequencies will require new rolling stock. Euskotren's fleet will expand from 62 to 67 units with the introduction of five new Series 980 trains manufactured by CAF. These trains will feature four cars, a capacity for 400 passengers, a restroom, and advanced technological features for accessibility and safety.
