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Tuesday 19 November 2013

Throgs Neck Bridge,New York:

Throgs Neck Bridge,New York:


The Throgs Neck Bridge is a suspension bridge opened on January 11, 1961, which carries Interstate 295 over the East River where it meets Long Island Sound. The bridge connects the Throggs Neck section of the Bronx with the Bay Terrace section of Queens. It is the newest bridge across the East River and was built to relieve traffic on the adjacent Whitestone Bridge which opened in 1939.The Throgs Neck Bridge is the easternmost bridge off of Long Island. Due to this and its proximity to both the Cross Bronx Expressway and the New England Thruway, it is the preferred route from Long Island to New Jersey via the George Washington Bridge, upstate New York, Connecticut and other points north and east. Heading northbound, there are views of the Trump Towers in New Rochelle, Westchester County, and heading southbound on a clear day, one can see the Manhattan skyline.

The Throgs Neck Bridge was planned and managed by Robert Moses. His first plan for a Throgs Neck span dates back to 1945, six years after his previous project, the Bronx–Whitestone Bridge, was completed two miles (3 km) to the west. This bridge was one of the few not intended for the Belt System of highways wrapping around Queens and Brooklyn. Moses commissioned famed New York City bridge designer Othmar Ammann. Ammann was the man behind the George Washington, Bronx-Whitestone, Verrazano-Narrows, and Triborough Bridges. This was Ammann's first long span job after 1940, which saw the collapse of the original Tacoma Narrows Suspension Bridge in the state of Washington. Instead of employing a rather streamlined-looking plate-girder system, Ammann constructed his bridge with 28-foot (8.5 m) deep stiffening trusses under the deck. These would weight the bridge and allow any wind to simply blow through, instead of against, the bridge.Ammann designed the bridge with long, curved approaches (increasing the length of the roadway) in order to allow for water traffic beneath the span. The shores of Bay Terrace and Throggs Neck are rather low, so to build a bridge right over the water without approaches would leave almost no clearance under the bridge. Deck-raising began at each tower until crews met at the center, extending out to the approach viaducts.The span is 1,800 feet (549 m) long, with an anchorage to anchorage total length of 2,910 feet (887 m). The bridge was designed without non-motorized access of any kind. There are also no regularly scheduled buses.

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