Alstom to supply signalling infrastructure for Istanbul Metro Line M5 and BBYO route, Turkey November 28, 2021 | Europe News Alstom has secured a contract from the Dogus, Ozaltin, and Yapi Merkezi joint venture (JV) to supply, test, and commission signalling systems on the 11-km Cekmekoy–Sancaktepe–Sultanbeyli eastern exten... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password