Signage is designed to convey information primarily to assist passengers with decision-making, therefore factors such as clarity, visibility, safety, accessibility, applicability and style are important elements to take into account in signage design. Good signage communicates with passengers effectively by using clear messages, appropriate shape and size, recognisable symbols and infographics, legible typefaces/fonts and clearly contrasting colours.
The study gathers information from 28 CoMET and Nova metros and looks into their guidelines for signage design, as well as good examples that have been implemented by metros. These examples are presented by exploring six key objectives: signage for clarity, signage for branding and identity, signage for safety and security, signage for wayfinding and navigation, signage for accessibility, and signage to encourage good behaviour. The enhancements carried out by metros to improve clarity, visibility and legibility of signage are also discussed in the report. Currently, metros are exploring various approaches to complement their static signage with new types of dynamic information to encourage greater passenger awareness and decision-making. This includes dynamic information for crowd control, passenger flow, and incident response, leading to an increasing use of digital signage, and other mobile applications.