Alstom to supply Urbalis signalling system for Madrid Metro Line 6, Spain January 21, 2025 | Company News, Europe Company News, Europe News, News Alstom has secured a contract from Madrid Metro to supply its Urbalis signalling system for Line 6. This will upgrade the current communications-based train control (CBTC system) from semi-automatic o... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password