It is important that employers ensure that their employees are aware of and understand the meaning of safety signs and signals either seen or heard during their work, including providing training where necessary. Although most safety signs are self-explanatory, employees (particularly new, young or inexperienced ones) may be unfamiliar with the meaning of some of the less commonly used signs. It is therefore important that the meaning of any sign is clearly explained, and that employees are aware of the consequences of not following the warning or instruction given by the sign. Text supplementing the sign may have a useful role here. GENERAL RULES ON THE USE OF SAFETY SIGNAGE If the hearing or sight of any employee is impaired, for example by wearing personal protective equipment, additional measures should be taken to ensure that employees can see or hear the warning sign or signal, for example by increasing the brilliance or volume. In some cases, more than one typ...