Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Tactile Map(also: Raised Map, Touch Map)
- A map designed to be read by touch, using raised lines, textures, braille labels, and other tactile elements to represent geographic or spatial information for blind and visually impaired users. Tactile maps can represent indoor spaces (floor plans), outdoor areas (campus maps,…
- Tactile Paving(also: Tactile Ground Surface Indicators, TGSI, Detectable Warning Surface)
- A system of textured ground surface indicators installed on footpaths, train platforms, and building floors to assist pedestrians who are blind or have low vision with navigation and hazard detection. Tactile paving typically uses two patterns: raised dots (truncated domes) to…
- Tactile Signage(also: Tactile Signs, Touch-Readable Signs)
- Signs designed to be read by touch, typically featuring raised lettering, Braille text, or tactile symbols. Required in many jurisdictions under accessibility legislation such as the Americans with Disabilities Act (ADA), tactile signage is placed at standard locations like room…
- Tactile paving(also: Tactile ground surface indicators, TGSI, Detectable warning surface)
- A system of textured ground surfaces installed on footpaths, transit platforms, and pedestrian crossings to provide navigational cues to people with visual impairments through the sense of touch underfoot or via a white cane. Standardised patterns include raised dots (warning of…
- Talking Signs(also: Talking Sign)
- An assistive technology system that uses infrared (IR) frequency modulated voice signals to transmit spoken information about signage to people with vision loss. Developed by the Smith-Kettlewell Eye Research Institute in 1992, Talking Signs broadcast recorded messages that can…
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