To satisfy the design brief, all the proposals were required to incorporate certain features—parade ground, playing fields, skating pond, at least one flower garden, and a lookout tower, among rather a lot else—and they also had to incorporate four crossing streets at intervals so that the park wouldn’t act as a barrier to east-west traffic along its entire length. What set Olmsted and Vaux’s design apart more than anything else was their decision to place the cross streets in trenches, below the line of sight, physically segregating them from park visitors, who passed safely above on bridges.
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