An interesting look at public transportation in Mexico City, one of the world’s largest metropolitan areas. From globalvoices:
The Federal District of Mexico City is the capital city of the United States of Mexico and has a population of 8,851,080 inhabitants (the Mexico City Metropolitan Area has 20,137,152 inhabitants), according to the latest official census. Most of them use the public transportation network daily to travel from their home to their place of work, education or entertainment.
Read more: Mexico: The Reality of Public Transportation in Mexico City