OSHA Signs are used to indicate and define specific hazards that, without identification, may lead to accidental injury to workers and/or the public or to property damage, per OSHA Specifications for Accident Prevention Signs and Tags, 1910.145.
OSHA has specific guidelines regarding use of Danger and Caution signs. Danger signs indicate immediate danger and that special precautions are necessary. Caution signs are used to warn against potential hazards or to caution against unsafe practices.