Traffic road sign cmyk

Quick answer：

Cmyk refers to the color model used in printing, which stands for Cyan, Magenta, Yellow, and Key (Black). In the context of traffic road signs, cmyk might refer to the colors used in the design of these signs, typically black and white for visibility. Traffic road signs are designed to convey information clearly and safely to road users, following specific design standards that ensure legibility and comprehension regardless of lighting conditions.