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Stop signs are a unique sign on the US roadways. The stop sign is the only sign on the road that is in the shape of an octagon. I could be wrong but I think the stop sign is shaped as a octagon to help aid in identification from a distance.

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7y ago
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14y ago

Because you get more from a sheet of metal. Pure economics.

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9y ago

So it can be recognised even if part of it is covered up (by ice or snow maybe). The stop sign is the only octagonal shaped traffic sign

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Q: Why are stop signs octagon shaped?
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