The project of Thessaloniki Metro included construction of an approx. 10km-long line (the central section of the new line), which passes underground, below the main road arteries and the city centre. Part of the project were also the construction of 13 stations, a depot for rolling stock together with a workshop for maintenance and repair of mechanical and electrical equipment, the supply of rolling stock and installations for line operations. The operations and control center of the new line was built in the same area, together with the administrative offices of the Thessaloniki Metro company.

The new line is completely automated, with no operators, with an attendant onboard the train, with a transport capacity of 315,000 passengers per day and a frequency of 90 seconds at peak times. The new metro is estimated to help reduce CO₂ emissions by 212 tons per day, removing approximately 60,000 vehicles from the roads daily.