The Port Authority of New York and New Jersey (PANYNJ) is a bi-state port district, established in 1921 (as the Port of New York Authority) through an interstate compact, that runs most of the regional transportation infrastructure, including the bridges, tunnels, airports, and seaports, within the New York–New Jersey Port District. This 1,500 square mile (3,900 km²) District is defined as a circle with a 25 mile (40 km) radius centered on the Statue of Liberty in New York Harbor.
The Port Authority operates the Port Newark–Elizabeth Marine Terminal, which handled the third largest amount of shipping of all ports in the United States in 2004 and the largest on the Eastern Seaboard. The Port Authority also operates Hudson River crossings, including the Holland Tunnel, Lincoln Tunnel, and George Washington Bridge connecting New Jersey with Manhattan, and three crossings that connect New Jersey with Staten Island.