The Port Authority Trans-Hudson (PATH) is a rapid transit railroad linking Manhattan, New York with New Jersey, and providing service to Jersey City, Hoboken, Harrison, and Newark. It is operated by the Port Authority of New York and New Jersey. PATH is one of the few rapid transit systems in the world that operates 24 hours a day, 7 days a week. While some PATH stations are adjacent to New York City Subway, Newark Light Rail and Hudson-Bergen Light Rail stations, there are no free transfers as the four systems operate independently.
PATH spans 13.8 miles (22.2 km) of route mileage, not including any route overlap.
PATH trains only use tunnels in Manhattan and parts of New Jersey (specifically, Hoboken and downtown Jersey City). The tracks cross the Hudson River through century-old cast iron tubes that rest on the river bottom under a thin layer of silt. PATH's routes from Grove Street in Jersey City west to Newark run in open cuts, at grade level, and on elevated track.
As of 2006, PATH has an average weekday ridership of 239,200.
