Our life is full of signs. Do this, don’t do that, don’t ever, ever even think of doing the other. Etc. Some signs state the bleeding obvious, others give a degree of unintended ambiguity. My wasted favourite, although it may ever have existed was the sign in a park frequented by school children; “It is forbidden to throw stones at this sign”
Some signs are superfluous, some have achieved their objective. This includes the one in the picture. At some point parking presumably was an issue. The sign has clearly done its stuff!