ISO 3864 specifies international standards for safety labels. These labels are graphical, to overcome language barriers. There is an alternative American standard, ANSI Z.535, which is incompatible with the international standard. The ANSI standard requires an accompanying text, which can pose problems for environments in which people expected to understand the sign may not read the language or may not read at all, including many workplaces in the USA.
ISO 3864-1:2002 establishes the safety identification colours and design principles for safety signs to be used in workplaces and in public areas for the purpose of accident prevention, fire protection, health hazard information and emergency evacuation.
ISO 3864-1:2002 is applicable to workplaces and all locations and all sectors where safety-related questions may be posed.
However, it is not applicable to the signalling used for guiding rail, road, river, maritime and air traffic and, generally speaking, to those sectors subject to a regulation which may differ.