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Prior to the study conducted by the USCG and the NYSDOT, options to ameliorate the issue included a new rail tunnel under the Hudson River, the rehabilitation of the Poughkeepsie Bridge, the use of the North River Tunnels, a cross-harbor rail ferry, the use of low-profile piggyback equipment and the use of the Harlem, New Haven, and Hudson Divisions through the removal of clearance restrictions.
The vertical clearance is 8 ft 11 in (2.72 m). The IRT Lexington Avenue Line of the New York City Subway , carrying the 4 , 5 , 6 , and <6> trains, runs parallel to the Park Avenue Tunnel in two tunnels below it.
Alexander Hamilton Bridge in May 2024. 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.
In civil engineering, clearance refers to the difference between the loading gauge and the structure gauge in the case of railroad cars or trams, or the difference between the size of any vehicle and the width/height of doors, the width/height of an overpass or the diameter of a tunnel as well as the air draft under a bridge, the width of a lock or diameter of a tunnel in the case of watercraft.
When closed, the bridge provided 28 feet (8.5 m) of vertical clearance, and when opened, two shipping channels of 124 feet (38 m) and 123 feet (37 m) in the east and ...
Vertical clearance: The minimum vertical clearance under overhead structures, such as bridges, is 16 feet (4.9 m), including both paved shoulders and an allowance for extra layers of pavement. Through urban areas, at least one routing is to have 16-foot (4.9 m) clearances, but others may have a lesser clearance of 14 feet (4.3 m).
NYT Strands Spangram Hint: Is it Vertical or Horizontal? Today's spangram is horizontal (left to right). Related: The 26 Funniest NYT Connections Game Memes You'll Appreciate if You Do This Daily ...
The current bridge was constructed between 1957 and 1962 to replace the second span. It contains a navigable channel 304 feet (93 m) wide. The bridge provides 136 feet (41 m) of vertical clearance when it is in the open position and 25 feet (7.6 m) of vertical clearance in the closed position.