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I hope this is the correct place for this type of question.

I was wondering what the symbol on a US DOT W21-1a Worker Ahead road sign is.

My wife thinks it's a flagger with their flag down. I think it's a person digging.

Unfortunately, even though I can find everything else, including the dimensions of the image, I can't locate a description of what the image is supposed to be doing.

This is the image for reference: image of sign

Official source please, if possible.

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2 Answers 2

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Here's the US Department of Transportation's official description from the 2009 MUTCD:

W21-1 is shown as a diamond-shaped sign with a symbol of a right-facing person with a shovel digging.

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Its a person digging. Its based on the UK roadsign by Margaret Calvert (who inspired roadsigns across the world - see the German or Australian ones for the same).

She is on record as saying she wished she'd made the sign more shovel-like.

She told Frieze: “I now regret that I didn’t put a corner of a spade on the ‘men at work’ sign, it would have stopped all the jokes about a man struggling to put up an umbrella!”

I guess its a salutary lesson about design, if its not 100% clear, its going to be confusing for all of future history!

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    The US version is a slight modification, and doesn't look much like an umbrella.
    – TRiG
    Jul 16, 2017 at 19:52

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