Louis I. Kahn. (American, born Estonia. 1901–1974). Traffic Study, project, Philadelphia, Pennsylvania. Plan of proposed traffic-movement pattern. 1952. Ink, graphite, and cut-and-pasted papers on paper. 24 1/2 x 42 3/4" (62.2 x 108.6 cm). The Museum of Modern Art, New York. Gift of the architect.

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