ADA Accessibility Guidelines for Buildings and Facilities (ADAAG)
The whole scoop if you really want to delve into the particulars of the ADA as it pertains to signage. Find it
Revised 2010 ADA Guidelines from the DOJ
These most recent documents can be found
We manufacture our ADA signs using the Raster™ Braille method and UV printed Braille - preferred by the latest ADA regulations.