Mandatory
This sign, a solid circle of blue, tells you what you must do ... obey. The message or text is printed in white on blue either within a circle of solid blue or in a rectangular panel next to the relevant mandatory symbol.








This sign, a solid circle of blue, tells you what you must do ... obey. The message or text is printed in white on blue either within a circle of solid blue or in a rectangular panel next to the relevant mandatory symbol.