Mexico City to extend Metrobús BRT June 22, 2011 | Latin America News The Mexico City government plans to add a new line to the Metrobús bus rapid transit (BRT) system. A 27.3 km Line 4 will be added to the city's BRT system. The BRT line will run from Buenavista... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password