u/Low-Secretary5101

Anyone know what the he'll this is? It's on an old signpost at a street corner in downtown Oakland, there is an identical one on the other side of the post they are made of metal like a streetsign, I haven't seen any others around. I have tried reverse image searching it and even asking AI but nobody knows what the he'll this is, I've also gone on Google street view as far back as I can to like 2006 I think, back to when there was a sign at the top of the post, the property it sits outside of is just a gravel lot that someone uses to store old trailers. Anyone got a clue?🫠​​