3.3 million happy commuters every day.


6.Sao Paulo Metro
 
“This is a metro that is known worldwide for its capacity, safety, security, speed, cleanliness and accessibility, and operates one of the busiest lines in the world,” said Terrapinn, organizer of “The Metros” when awarding São Paulo “Best in the Americas.”
One of the world's billion-passengers-a-year networks, São Paulo Metro has only 74 kilometers of track, leaving one to wonder where they fit the 3.3 million passengers each day.
Bonus points to this metro for giving full police powers to the Metro security guards.