Traffic Signals and Depth Perception

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Science  22 Sep 1967:
Vol. 157, Issue 3795, pp. 1464-1465
DOI: 10.1126/science.157.3795.1464


Automobiles approaching red traffic signals at night appear to go beyond them when viewed from some distance to the rear. The phenomenon is doubly illusory because the higher of two objects has been presumed to appear more distant. The illusion is probably limited to small visual angles (about 2 degrees).