(based upon original ADAAG guidelines)
Room identification signs are signs that identify permanent rooms and spaces. These signs include raised text, braille, and pictographs or symbols.
Directional and informational signs are signs that direct you to and from rooms, and inform about rooms/spaces. These signs may include text, symbols, and directional arrows.
This category of signs are used to identify, direct to, and inform about accessible features and elements.
This category of signs are a type that are not required to comply.