This does not necessarily mean they are totally blind, as in, they do not see anything. They may have enough useful vision to identify colors or large shapes, or they may have light perception. But “blind” is an acceptable term for those who identify as such. There are also people who identify as low vision, meaning that they may have more useful vision than someone who is blind, but still not enough to, for instance, read a standard print menu without assistance, or drive a car. When in doubt, asking the person or people in question what they would prefer is always a good way to go. Now that we have that out of the way: accessible design for people who are blind or low vision. It starts with a few things that are covered by the ADA Standards and the California Building Code (CBC); namely, accessible signage, truncated domes (or detectable warnings), and protruding objects. While the ADA Standards and the CBC include many accommodations for people with mobility disabilities, there really are only a few for those with visual disabilities. Tactile signs, covered by the ADA Standards at 703 and by the CBC at 11B-703, are perhaps the main item that people think of when they think of accessible design for people who are blind. However, even many of the signs for sale described as “accessible” fall short of standards and may be illegible or just plain wrong. (As in, the raised print text and the braille don’t match. The sign might say “Community room” in print, but “restroom” in braille. You can imagine how this would cause confusion and inconvenience.) Tactile signs may be the one piece of writing in many buildings that a blind person encounters that is accessible to them, so it is important that the signs meet standards for legibility and have correct, matching braille. Placement of accessible signage also matters. People who are blind are taught where to look for accessible signage (typically to the latch side of a door to the room the sign identifies). Keeping an 18”x18” clear floor space centered on the tactile elements of the sign, outside the swing of the door, ensures that someone who is blind or low vision can get close enough to read the sign by touch or by sight, and that they will not be hit by the swinging door in the process. Informational signs, such as No Smoking signs, are not required to be tactile and have braille, because there is no standard location for them. A blind person would not know where to look for such a sign, so may never even encounter it. Section 705 (ADA Standards) and 11B-705 (CBC) cover detectable warnings, or truncated domes. Truncated domes have been developed as a “warning to indicate the presence of a vehicular way,” according to the California Access Compliance Advisory Reference Manual (available from the DSA website). “Advisory 11B-247.1.1 General. Detectable warnings are provided for the benefit of persons with visual impairments to indicate transitions to potentially hazardous areas.” This is why you will see them at areas like curb ramps, blended transitions, road crossings, and transit boarding platforms. Detectable warnings indicate potential hazards in two ways: one is tactile, and one is visual for those with some useful vision. Bright yellow is a color that is easier for people with low vision to see, even at night. Maritza Calderon, a colleague of mine with low vision, states that the bright yellow color helps her know where she may be crossing into a hazardous area. She does not care for the tactile element; she knows, as we do, that the truncated domes can cause difficulty for people using wheelchairs, canes, or crutches, and she worries about slipping on the potentially slick surfaces in the rain. Frank Welte, a blind colleague, has a different take on the age-old point of contention that is the detectable warning. According to Frank, curbs used to be a perfectly fine indicator that you were about to cross into a dangerous area. When curb cuts were introduced, so were potential hazards to blind and low vision people. The compromise was to introduce detectable warnings. People with mobility disabilities could navigate the world independently because of the curb cuts and people with visual disabilities were still warned of hazardous areas. “What we [blind and low vision people] lose in safety [from curb cuts] is far outweighed by what others gain in mobility accessibility.” Frank also points out that he is strongly in favor of the use of detectable warnings when they are used appropriately: names as a warning that one is about to cross into a vehicular area. Proper placement of detectable warnings allows them to serve as guideposts and help people who are blind or have low vision stay safe. Finally, regulations pertaining to protruding objects (Section 307 of the ADA Standards and 11B-307 of CBC) protect blind people from running into things. Cane detectable railings under stairs are one good example of this, keeping blind people from pulling what is referred to in the blindness community as a “head-banger.” Unfortunately, there are still plenty of places that head-bangers occur; think of low hanging tree limbs in a sidewalk area, large sculptures that overlap walking spaces, etc. It is not so easy to duck under or avoid a protruding object when you can’t see it. With a little thought and foresight, architects and designers can create spaces that go above and beyond the scope of what is covered in the codes. Have you ever thought of incorporating highly contrasting colors into your walls and floors, for instance, to make it easier for someone with low vision to find their path? Or how about using sliding doors on cabinets to prevent head-banger situations? Maybe use a textured wall on one side of a hallway and a smooth wall on the other, so you can more easily give someone directions? (third door on the textured wall) What creative ways can you think of to improve accessibility for people who are blind or low vision? |