The Guide to ADA Standards provides some info: > The required location of tactile signs is relatively uniform (i.e., beside or, where permitted, on doors) to

The Guide to ADA Standards provides some info: > The required location of tactile signs is relatively uniform (i.e., beside or, where permitted, on doors) to make them easier to locate without vision. The height is limited to a specific range (48 inches – 60 inches) to facilitate reading by touch. So a blind person touches a door frame, and gets a cue to feel for a sign. https://www.access-board.gov/ada/guides/chapter-7-signs/ https://www.access-board.gov/ada/guides/chapter-7-signs/