The turn-key Project consists of the engineering, procurement, construction, assembly and system integration, testing & commissioning works of 22.5 km long mass transit rail system between Kabataş-Mecidiyeköy-Mahmutbey with 5.5 km TBM/NATM tunnel construction work and viaducts, whole construction works of 3 stations, finishing and electromechanical works of 15 stations, 1.5 km depot yard connection line and superstructure of the depot area and maintenance buildings.