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Why are caution signs yellow?

Updated: 9/22/2023
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11y ago

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Because scientifically it has been proven that to the human eye, black on a yellow surface is easier to see than any other color combination. Caution signs are obviously meant to be noticed and therefore they are often yellow with black writing or pictograms.

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Q: Why are caution signs yellow?
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What is the noun form of cautious?

caution like on those yellow signs


A flashing yellow light at an intersection?

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