designer's own words:Have you ever gone down the stairs as you close your eyes? Fear and anxiety which the blind feel in public space. The biggest part that the blind feel fear on the street is using stairs. Using the stairs as we cannot see just ahead accompanies with a sense of unsease. Being seized with fear and anxiety when we reach the end of the stairs can be the component to raise the possibility of danger. On this factor, the blind can recognize the dangerousness an grasp the number of stairs through the 'Safety Dot'. Moreover, they can prepare for danger and secure the trust in public services as they feel a sense of security when they reach the end of the stairs.