If it's all-way stop there will often be a small placard below the stop sign. If there's no placard there then (usually) cross traffic doesn't stop. Sometimes t

If it's all-way stop there will often be a small placard below the stop sign. If there's no placard there then (usually) cross traffic doesn't stop. Sometimes there's a placard that says "two-way" stop or one that says "cross traffic does not stop", but that's not as common in my experience.