Thessaloniki Metro (New Railway Station – Nea Elvetia, Kalamaria extension to Mikra)

9.6 km of twin single-track tunnel with 13 stations (New Railway Station, Dimokratias, Venizelou, Agia Sofia, Sintrivani/Expo, Panepistimio, Papafi, Efklidis, Fleming, Analipsi, 25 Martiou, Voulgari, Nea Elvetia) and the Pylaia depot. The contract with the AEGEK – Impregilo – Ansaldo T.S.F. – SELI – AnsaldoBreda joint venture was signed on 7 April 2006 and construction began at the end of June 2006, aiming at October 2012. On 6 December 2017 Aktor ATE replaced AEGEK and SELI in the joint venture. The line opened on 30 November 2024. Elliniko Metro gives the approved budget of the co-funded operation as €1,534 million excluding VAT (€719 million for Project 1, €815 million for Project 2, including 24 trains). The original contract value is omitted because published figures disagree.

4.78 km of underground twin-tunnel line from Patrikiou, between 25 Martiou and Voulgari on the base line, to Mikra, with five stations: Nomarchia, Kalamaria, Aretsou, Nea Krini and Mikra. Financial offers were opened on 24 December 2012, with Aktor first at €311.95 million; the award was approved on 25 June 2013 and the base contract (€400 million) signed the next day, when Attiko Metro gave the overall budget as €518 million and commissioning was foreseen for 2018. Work sites opened in 2014. The contract's completion date of 18 December 2019 was not met, and further contracts for systems and 15 new trains followed. It opened on 27 August 2026. Elliniko Metro now gives the approved budget as €570 million excluding VAT, including nine trains.