Alexander Hamilton Bridge

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Alexander Hamilton Bridge
Alexander Hamilton Bridge crossing the Harlem River in November 2007
Coordinates	40°50′44″N 73°55′43″W / 40.8456°N 73.9287°W / 40.8456; -73.9287
Carries	8 lanes of I-95 / US 1
Crosses	Harlem River
Locale	Manhattan and The Bronx in New York City
Maintained by	NYSDOT
Characteristics
Design	Open-spandrel deck arch bridge
Total length	2,375 feet (724 m)
Width	[1]
Longest span	555 feet (169 m)
Clearance below	103 feet (31 m)
History
Opened	January 15, 1963[2]
Statistics
Daily traffic	177,853 (2016)[3]
Toll	none
Location

The Alexander Hamilton Bridge is an eight-lane steel arch bridge that carries traffic over the Harlem River between the boroughs of Manhattan and the Bronx in New York City. The bridge connects the Trans-Manhattan Expressway in the Washington Heights section of Manhattan with the Cross Bronx Expressway as part of Interstate 95 (I-95) and U.S. Route 1 (US 1).

The bridge opened to traffic on January 15, 1963, the same day that the Cross Bronx Expressway was completed. For 2011, the New York City Department of Transportation, which operates and maintains the bridge, reported an average daily traffic (ADT) volume in both directions of 182,174, having reached a peak ADT of 192,848 in 1990.^[4]

The total length of the bridge, including approaches, is 2,375 feet (724 m). Its parallel main spans are 555 feet (169 m) long and provide 103 feet (31 m) of vertical clearance over the Harlem River at the center and 366 feet (112 m) of horizontal clearance.^[5]

The bridge design included a set of spiraling ramps (officially known as the Highbridge Interchange and colloquially known as "The Corkscrew") to connect to and from the Major Deegan Expressway (completed in 1964) and a viaduct ramp connecting to Harlem River Drive, both of which are over 100 feet (30 m) below the level of the bridge, and access to Amsterdam Avenue.^[5]

After the George Washington Bridge, which connects Manhattan and New Jersey was completed in 1931, vehicles traveling between New Jersey and The Bronx would travel over the Washington Bridge, which crosses the Harlem River just north of the present Alexander Hamilton Bridge.^[6] The Alexander Hamilton Bridge was planned in the mid-1950s to connect Robert Moses' proposed Trans-Manhattan and Cross-Bronx Expressways and to accommodate the additional traffic resulting from the addition of the six-lane lower level to the George Washington Bridge.^[5][7] With the Interstate designation, 90% of the $21 million in construction costs were covered by the federal government. The bridge opened on January 15, 1963.^[2]

Starting in 2009, the bridge underwent a full renovation at an estimated cost of $400 million.^[8] While the traffic jams created from the construction had not been as bad as local officials had anticipated, inbound delays at the Hudson River crossings increased after the project began.^[9] In July 2014, Governor Andrew Cuomo announced that the bridge renovation was complete.^[10]

• Transport portal
• Engineering portal
• New York (state) portal
• New York City portal
• List of bridges documented by the Historic American Engineering Record in New York (state)

Wikimedia Commons has media related to Alexander Hamilton Bridge.

• New York State Department of Transportation - Alexander Hamilton Bridge Project
• NYC Roads: Alexander Hamilton Bridge
• Historic American Engineering Record (HAER) No. NY-302, "Alexander Hamilton Bridge, Spanning Harlem River between Bronx & Manhattan, Bronx, Bronx County, NY", 1 photo, 1 photo caption page
• Alexander Hamilton Bridge at Structurae
• Bridge and Tunnel Club pictures of the Alexander Hamilton Bridge
• Nautical Chart #12342^{[permanent dead link‍]} NOAA.