Any directional or informational sign or text about the permanent room or space that is identified with raised characters and Braille does have to follow the rules for visual signs.
Some signs have tactile sections and visual sections. For instance, a room identification sign might have a tactile room number (with Braille) to identify it, and then have its function in visual format. If the function might change from time to time, it can be printed on an insert. It’s important to remember that the vast majority of people who have various kinds of vision conditions that limit their ability to read signs are able to see. Only a small percentage of the population has no usable vision at all, and an even smaller percentage read Braille. That is the purpose of the tactile characters.
The ADA was passed to help everyone in our society have access and to be safe in our communal and public spaces. Wayfinding, safety, and identification signs that are readable by everyone, by those with reduced vision from any special condition, and those who need easy-to-read signs because they don’t hear verbal directions, or even by those who are color blind, help us realize the promise of this important Civil Rights Act.
—Sharon Toji, “ADA Sign Lady”