On Tracey Towers, Bronx, NY
"In Tracey Towers, the exterior walls are not curved for structural reasons at all, but because the site plan and traffic movement dictated an easing of the corners. They are also curved in order to lead the eye around the towers, thereby emphasizing their three-dimensionality. They are also curved because they give a heightened sense of security to the occupants of a very high building, and one looks out and sees these walls, which seem like huge columns, closely rising from the ground. However, they are not columns, but walls, but they are read as columns, which is as intended for psychological reasons.
The geometry of the car is curvilinear and is, in this case, related to the rectilinear organization of the building itself. It is the result of two dissimilar elements coming together."
Cook, John Wesley. Conversations with Architects : Philip Johnson, Kevin Roche, Paul Rudolph, Bertrand Goldberg, Morris Lapidus, Louis Kahn, Charles Moore, Robert Venturi & Denise Scott Brown. New York: Praeger, 1973. p. 120.