New York City Jersey and Midtown Manhattan, is the busiest vehicular tunnel in the world. The tunnel was built instead of a bridge to allow unfettered passage of large passenger and cargo ships that sailed through New York Harbor and up the Hudson River to Manhattan's piers. The Holland Tunnel, connecting Lower Manhattan to Jersey City, New Jersey, was the world's first mechanically ventilated vehicular tunnel when it opened in 1927. The Queens-Midtown Tunnel, built to relieve congestion on the bridges connecting Manhattan with Queens and Brooklyn, was the largest non-federal project in its time when it was completed in 1940. President Franklin
Boroughs of New York City River, and during the Dutch colonial era, was under the jurisdiction of New Amsterdam and known as Bergen. Jersey City and Hoboken in Hudson County, New Jersey, are sometimes referred to as the sixth borough, given their proximity and connections by rapid transit PATH trains. Fort Lee, New Jersey, in Bergen County, opposite Upper Manhattan and connected by the George Washington Bridge, has also been called the sixth borough. Miami and nearby areas in Florida, Philadelphia and China are locales entirely outside the city's metropolitan area which have been called New York City's sixth borough. Boroughs of New York City