American National Standard Z535.2 states "A visual alerting device in the form of a sign, label, decal. or other marking which advised the observer of the nature and degree of the potential hazard(s) which can cause an accident. It may also provide other directions to eliminate the hazard and may advise of the probable consequences of not avoiding the hazard"

Promote safety with ANSI compliant signs, Make it clear that your policy promotes safety first. Set the tone for a clean and accident-free working environment. Communicate the importance of avoiding accidents. Be committed to improving conditions for workers. ANSI recognizes the importance of posting high quality safety signs in all hazardous and unsafe areas of a work environment.These safety signs are intended to indicate the potential, type, and degree of the hazard that may lead to accidental injury and property damage. Accident Prevention Signs are intended to convey a clear and rapidly understood message of the specific hazards