What is used to convey information in international road signs?

International road signs primarily use symbols to convey information. This approach allows for quick and universal understanding across different languages and cultures. Symbols are more effective than words because they can be easily recognized and understood by drivers regardless of their native language, facilitating safer navigation.

While letters, colors, and diagrams do play roles in communication on the roads, symbols have the distinct advantage of offering clear, immediate recognition of road rules, warnings, or directions. For example, a stop sign universally depicted with an octagonal shape and red color carries the same meaning to drivers from various backgrounds, eliminating the potential confusion that may arise from text. Additionally, although colors can indicate specific types of warnings or convey urgency, and diagrams can provide context or an illustration, symbols are the primary means of communicating essential information quickly and clearly in road signage worldwide.