New York City Subway, operated by the Metropolitan Transportation Authority (MTA), is the seventh busiest rapid transit rail system in the world, and the busiest in the US, with over 1.7 billion riders in 2012. Including the Staten Island Railway, the system provides service 24 hours a day, every day, in all five boroughs of New York City.
Port Authority Trans-Hudson (PATH), operated by the Port Authority of New York and New Jersey (PANYNJ), connects the New York City borough of Manhattan with the northern New Jersey municipalities of Harrison, Hoboken, Jersey City, and Newark, and carried 72.6 million riders in 2012, more than the entire public transit systems in Atlanta, Los Angeles, or Miami.