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Journal Article

Citation

Drory A, Shinar D. J. Saf. Res. 1982; 13(1): 25-32.

Copyright

(Copyright © 1982, U.S. National Safety Council, Publisher Elsevier Publishing)

DOI

unavailable

PMID

unavailable

Abstract

Drivers were stopped 200 m (656 ft) after passing a warning sign and tested for their recall and recognition of the sign. An average of 5 to 10% of drivers registered the sign under various conditions, but these results were independent of specific sign content or roadway environment. Both objective and subjective measures of fatigue were related to the probability of seeing a sign on a straight and level road but not on a hilly and winding road. It was concluded that under normal daylight conditions warning signs are either redundant (contain information directly available) or irrelevant to the driver's perceived needs and the driving task. Before ruling out their usefulness, warning signs should be evaluated under conditions of degraded visibility.

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