> A warning sign should be instinctive to most of the population. Isn't it good to also have standarized signs for warnings that are meaningful for a smaller s

> A warning sign should be instinctive to most of the population. Isn't it good to also have standarized signs for warnings that are meaningful for a smaller subset of the population (e.g. "rapid movement of workpiece in press brake machine")? It's not like you're going to see this sign on the street anyway. And if you happen to see the sign somewhere and don't understand it, at least you understand that it's a warning sign and know that you should ask someone what it means.