Modernization of ATC system for Seoul Metro Lines 3 and 4, South Korea June 13, 2026 | Asia Pacific Tenders, Tenders & Contracts Country: South Korea Organisation: Seoul Metro Description: Bids are invited to modernise the Automatic Train Control (ATC) system for Seoul Metro Lines 3 and 4, including the upgrade, installation, t... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password