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March 4, 1939


Author Affiliations

New Haven, Conn. Bureau for Street Traffic Research.

JAMA. 1939;112(9):869-870. doi:10.1001/jama.1939.02800090079026

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To the Editor:—  A recent interesting note (Fabing, H. D.: A Neurologic Note on Traffic Lights, The Journal, Sept. 24, 1938, p. 1166) stressed the need for biologically, physiologically and psychologically sound technic for making our machine age civilization fit the human being who has to use and enjoy it. Quite rightly it was held that traffic is one of the important fields in which such technics are necessary. This principle can and should be applied to the various problems arising from traffic facilitation and control. It is unfortunate, however, that the article goes on to recommend as biologically sound a type of traffic signal which has been tried out and discarded.The type of signal recommended was of the clock type in which a hand indicates how much time the red, yellow or green will remain showing. This type of signal and its variations have been discarded for several

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