No, it's not similar (in my corner of the world anyway). To me, that sign looks like the symbol Prince changed his name for a while. It wouldn't help me unless I could stop and study it first.
For the record: I think roundabouts would make perfect sense in an AI controlled traffic pattern; just not a human one. They're not intuitive to a lot of people. Perhaps if we were all born somewhere they were commonplace it would be different. *shrug*
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