Boroughs of New York City the term is used to refer to New York City as a whole unambiguously, avoiding confusion with any particular borough or with the Greater New York metropolitan area. The term is also used by politicians to counter a frequent focus on Manhattan and thereby to place all five boroughs on equal footing. In the same vein, the term "outer boroughs" refers to all of the boroughs excluding Manhattan, even though the geographic center of the city is along the Brooklyn–Queens border. All five boroughs were created in 1898 during consolidation, when the city's current boundaries were established. The Bronx originally
Staten Island Tunnel funded by the city, the tunnel was expected to help expand the then-sparsely populated borough in a similar manner to the population and development explosions seen in Brooklyn and the Bronx. Under the Dual Contracts, three routes were proposed—two to Brooklyn and one to Manhattan—which would connect the Staten Island Railway's rapid transit service (SIRT) to existing subway lines. The Manhattan proposal, often called the "direct route," would have connected with the Interborough Rapid Transit Company (IRT)'s lines under Battery Park, near the current Brooklyn–Battery Tunnel. "Direct Route A" would have utilized a five-section tunnel under the New York Harbor,