The completion of the Alexander Hamilton Bridge in 1963 diverted much of the traffic away from the Washington Bridge.
In 1977, US 1 was moved to Webster Avenue and the Cross Bronx Expressway, crossing the Harlem River using the Alexander Hamilton Bridge.
A study was completed, in which the tunnels would be rehabilitated and reused temporarily for traffic diverted from a reconstruction of the Trans-Manhattan Expressway and the Alexander Hamilton Bridge.
Crossing under the Alexander Hamilton Bridge, the Harlem River Drive crosses through High Bridge Park before turning away from the Harlem River in Tenth Avenue, which is the northern end of the Harlem River Drive.
The Trans-Manhattan Expressway, a portion of High Bridge is the oldest bridge in New York City still in existence, crossing the river just south of the Alexander Hamilton Bridge at 175th Street in Manhattan.
The Cross Bronx Expressway begins at the eastern end of the Alexander Hamilton Bridge as a continuation of the Trans-Manhattan Expressway and officially designated as both I-87 ) for Yankee Stadium and points upstate.
The Alexander Hamilton Bridge was planned in the mid-1950s to provide a direct connection between Robert Moses's 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.
The "'Washington Bridge "'carries six lanes of traffic, as well as sidewalks on both sides, over the Harlem River in New York City between the boroughs of Manhattan and the Bronx, connecting U . S . Route 1, which now travels over the Alexander Hamilton Bridge.