safety signs mean like no digging or be aware of wires.
What is a hazard? a hazard is some thing that can hurt you or someone else or something.
a prohibitive sign is a sign that tells you not to do something.
a mandatory sign is telling you to do something.
a hazard sign is saying to watch out.
a mandatory sign is telling you to do something.
a hazard sign is saying to watch out.
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