Ansaldo STS (STS. MI), through its subsidiary Ansaldo Segnalamento Ferroviario in consortium with the Turkish firm Alsim Alarko Sanayi Tesisleri Ve Ticaret, has been appointed as preferred bidder by the General Directorate of Municipality of Ankara (EGO) to design, supply, test and commission the signalling system on 4 lines of Ankara Underground (M1, M2, M3 and M4) and other electro-mechanical works (E&M) on lines M1 and M3.