New York City is home to over 2,000 bridges and tunnels. Several agencies manage this network of crossings, including the New York City Department of Transportation, Metropolitan Transportation Authority, Port Authority of New York and New Jersey, New York State Department of Transportation and Amtrak.
Nearly all of the city's major bridges, and several of its tunnels, have broken or set records. The Holland Tunnel was the world's first vehicular tunnel when it opened in 1927. The Brooklyn Bridge, Williamsburg Bridge, George Washington Bridge, and Verrazano–Narrows Bridge were the world's longest suspension bridges when opened in 1883, 1903, 1931, and 1964 respectively.
A bridge is a structure built to span physical obstacles such as a body of water, valley, or road, for the purpose of providing passage over the obstacle. There are many different designs that all serve unique purposes and apply to different situations. Designs of bridges vary depending on the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, the material used to make it, and the funds available to build it.