Siemens completes CBTC installation on Line 1 of Mexico City Metro December 9, 2025 | Latin America News, News Siemens Mobility has completed the installation of its Trainguard MT CBTC system on Line 1 of the Mexico City Metro. The project was included under the upgrade programme led by CRRC Zhuzhou to moderni... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password