Highway Fog Warning System
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1999-04-01
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Alternative Title:TechBrief Highway Fog Warning System
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Abstract:The need for a highway fog warning system has long been internationally recognized. With such a system, motorists can avoid tragic pile-up accidents caused by dense or patchy fog. The development of a cost-effective highway visibility sensor that measures the density of roadway fog and is linked to traveler information systems could substantially reduce fog accidents. With this in mind, FHWA conducted a study - summarized in this brief - to develop a low-cost, reliable fog sensor.
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