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A numbered coloured disc per line.
Also known as: Seoul metro line marking, Line number disc Korea
The Korean urban rail convention identifying each line by a number set in a distinguishing coloured disc.
Identifies each line of a Korean urban rail network by number in a coloured disc.
Contexts: Road signage, Public information
Combines number and colour so a passenger can use either, which matters on a network where a colour-blind traveller and a non-Korean reader need different halves of the same mark.
Contexts: Road signage, Public information
A filled circle carrying a line number, the fill colour differing between lines.