After the unsuccessful attempt to have the Thessaloniki Metro constructed by the Concession Contract method (1998-2003), in September 2003 the decision was made for this specific Project to be constructed by means of National and European Union funds.
On the basis of the new Invitation to Tender, in June 2004 five Joint Ventures consisting of major Greek and Foreign companies of the construction field expressed their interest in participating in this Tender. Its first phase was completed in November 2004. Four of the five Joint Ventures were qualified to proceed to the second stage of the tender and in January 2005 they took delivery of the tender documents, as well the new advanced concept design of the Project. In May 12th 2005, the pre-selected Joint Ventures submitted their Technical and Financial Offers and in August 19th the Tender Committee completed the evaluation process of the Technical and Financial Offers submitted by the three Joint Ventures, which were accepted to participate in the final phase of the Tender. The Contract with the Contracting Joint Venture AEGEK “IMPREGILO“ ANSALDO T.S.F “SELI“ ANSALDOBREDA was signed on April 7th 2006 and the construction of the Project commenced at the end of June 2006.