GB/T 15566-1995

This standard establishes the fundamental principles and requirements for applying graphical signs in public information systems, including design, placement, and maintenance guidelines. It is primarily used in China for creating consistent signage in public spaces such as transportation hubs, hospitals, and commercial buildings to ensure clear communication across different user groups. The standard applies to both static and dynamic sign systems, providing a framework for testing and evaluating sign effectiveness in real-world environments.