SOBSE to invest MXN8 billion for Mexico City metro Line 12 extension; STC deploys five rehabilitated trains March 31, 2016 | Latin America Finance The Secretariat of Public Works and Services in Mexico City (SOBSE) has announced plans to invest MXN8 billion to extend Mexico City metro Line 12 from Mixcoac to the Observatory station. The construc... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password