Design
Mandatory signs are a subset of the regulatory sign group as defined by the United Nations Economic and Social Council in the Vienna Convention on Road Signs and Signals of 1968, and are often seen not just on their own, but used in conjunction with other signs, traffic lights and bollards as a form of visual shorthand within these objects. In Vienna signatories, the mandatory sign is either a light blue circle with a white border or a white circle with a red border. The sign must be at least 60 cm (1.96 ft) across on rural roads, or 40 cm (1.31 ft) in built-up areas, although mandatory signs incorporated in traffic lights, bollards or larger road signs can be as little as 30 cm (0.98 ft) in diameter.
The mandatory sign group is not used in the United States and Canada, who are not signatories to the Vienna Convention; both countries consider them kinds of regulatory signs. Some Canadian provinces differentiate mandatory signs from prohibitive ones by enclosing the symbols in a green rather than red border, although this can indicate either a mandatory or a warning sign, while in the U.S., the only difference between a prohibitory sign and a mandatory one is that a mandatory sign includes the word "only" at the bottom of the plate instead of crossing out the pictogram.
Read more about this topic: Mandatory Sign
Famous quotes containing the word design:
“If I commit suicide, it will not be to destroy myself but to put myself back together again. Suicide will be for me only one means of violently reconquering myself, of brutally invading my being, of anticipating the unpredictable approaches of God. By suicide, I reintroduce my design in nature, I shall for the first time give things the shape of my will.”
—Antonin Artaud (1896–1948)
“Humility is often only the putting on of a submissiveness by which men hope to bring other people to submit to them; it is a more calculated sort of pride, which debases itself with a design of being exalted; and though this vice transform itself into a thousand several shapes, yet the disguise is never more effectual nor more capable of deceiving the world than when concealed under a form of humility.”
—François, Duc De La Rochefoucauld (1613–1680)