Handicapped Services.

We have come a very long way in Canada by way of offering services to the handicapped. Businesses are required to have wheelchair accessibility.  Every parking lot must have handicapped spaces. Movies and television have closed caption services for the hearing impaired and every elevator has braille on their buttons.  I am proud to live in a country that offers so many wonderful services. But I recently came across a sign in a public bathroom that I really don't understand. Notice the braille on both signs. How do the blind even know these signs exist?