It's all a matter of the context that humans understand. I've seen stop signs for the left hand turn lane that the main lanes didn't have. I've also seen signs

It's all a matter of the context that humans understand. I've seen stop signs for the left hand turn lane that the main lanes didn't have. I've also seen signs a bit askew (probably from kids messing with the sign) that were angled in such a way that an automated system may think belongs to the wrong street, but a human has no issues with.