Placement and Hierarchy
ADA identification signs are not just meant to stand alone in the environment but be part of a hierarchy of visual cues that support navigation by the blind and visually impaired. The ADA has a series of specific rules that govern the placement of signs, as well as how information is meant to be displayed on signs. In this case, it is important to understand when reading the ADA what the spirit of the guidelines are in addition to the letter of the standards. Like with visual and tactile characters, the spirit of the ADA encompasses two mantras: If You Do it Once You Do it Every Time – The Blind and Visually Impaired Have Different Needs. [line]
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