Often, when a highway crosses a railroad, the railroad company was still responsible for the design and construction of a bridge to form a grade separation, as opposed to having the road owner design and construct the bridge. Such bridges tend to display unusual design features because as highway bridges they are often lighter weight bridges than bridges built to carry trains, while still displaying a railroad company thinking in terms of bridge design. Surviving examples tend to be significant and worthy of preservation, and the 220th Street Bridge is no exception. The unusual bridge follows a Howe truss configuration whose counter members make it also look like a double-intersection Warren. The description of the bridge as a Howe as opposed to a Double-Warren is made on the basis that the upward-center facing diagonals are much more substantial than their counters. The bridge is an example of a rare truss type, and an example of a railroad-designed highway bridge.
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