The Mexico City Metro (Spanish: Metro de la Ciudad de México), officially called Sistema de Transporte Colectivo, often shortened to STC, is a metro system that serves the metropolitan area of Mexico City, including some municipalities in Mexico State. It is the second largest metro system in North America after the New York City Subway. In 2012, the system served 1.609 billion passengers, placing it as the eighth highest ridership in the world.[1]