People with vision loss find wayfinding easiest where interior layouts are straightforward and logical, and changes in direction are set at right angles. Avoid changes in floor elevation, such as daises placed in the centre of a room. If elevated surfaces are necessary, provide tactile warning indication through the use of a change in flooring. Use a border (such as carpeting or tiled surfaces) for raised surfaces that extends two or three steps around the perimeter of the dais.
Similarly, sunken floors, like those used in many restaurants and bars, can create a major hazard. If sunken areas are used, install railings or other barriers to prevent people with vision loss from inadvertently walking into the sunken area.
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