5. The Sign System is Designed as a Modular System of Panels to Make Any Kinds of Subway Signs

As described in the manual, the sign system consists of a series of modular signs of specific dimensions for 3 types of prescribed signs- 1’x2′ for information, 1’x4′ for direction, and 1’x8′ for station identification. These are all made by juxtaposing 1’x1′ panels that can be used in different combinations.