Actually, it is. Literally, and not in the way my daughter uses it. It's exactly what you were asking about
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Quote:
Originally Posted by AlanTheBeast2
Really looking for a "sign" with universal meaning.
Maybe time to design something and promote it internationally?
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It's a standard sign that warns traffic coming up behind you that you're likely to be slower than other traffic. It's required on vehicles that can't get over 40mph. Drop "international slow vehicle sign" into Google images and that's what you get.
If you're looking for something different, use a different question.