The Port Authority Trans-Hudson Railroad (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. While some PATH stations are adjacent to New York City Subway, Newark City Subway and Hudson-Bergen Light Rail stations, there are no free transfers as the four systems operate independently. PATH is also one of the few 24-hour operating rapid transit systems in the world. As of 2006, PATH has an average weekday ridership of 239,200.