@bruces I've seen some people here doubting these signs are real. I can't say if they are, but they do look real enough. For contrast: here is an image of a sign in Labeaume in France (April 2023). Fifteen years ago, it was still mostly visible (and readable) and the pole was still partially visible. Now both sign and pole are barely visible, the sign is not readable, but you can still see where the tree grew around it.