Prohibition signs are common safety signs that are designed to prohibit certain actions or behaviours that are likely to cause potential danger. By law, prohibition signs are required to be red, with these signs depicting an action within a red circle with a diagonal line across it. A prohibition sign depicts only what or who is forbidden, and are usually accompanied by a short ‘no’ or ‘do not’ instruction. Popular examples of prohibition signs include: ‘no access’, ‘do not run’, ‘no dogs’, and ‘do not use mobile phones’. These various prohibition signs are often used in areas to prevent certain actions which may cause harm, or to limit undesirable behaviours.
