The following rules generally apply: High visibility clothing should be worn when a person’s visibility needs to be increased. The main objective of this is to make the wearer as visible in his or her environment as possible, ensuring that he or she is visible from all angles and in all weather conditions. This primarily applies in work situations, where there is a risk of being overlooked during the day or night. Typical areas in which high visibility clothing is used include: Road works, municipal utilities, haulage, rubbish collection, runway control, railway work.