Monterrey Metro Lines 4 and 6 monorail works reach 80 per cent completion, Mexico February 27, 2026 | News, North America News The Government of Nuevo León has reported that construction of the monorail extensions for Metro Lines 4 and 6 in Monterrey has reached 80 per cent completion. Line 6 includes a grade-separated crossi... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password