You'll find articles written by Sharon Toji on the SignWeb site, along with an ADA message board. Check it out often!
SignIndustry
SignIndustry has an active message board dealing with the ADA. In addition, there are articles about ADA signs.
Talking Signs™
Talking Signs has developed, in partnership with Smith Kettlewell Institute, an infrared system of audible signs. The signs are installed around the facility, and the receiver is carried by the user, who scans the environment for a sign. San Francisco has many installations of Talking Signs.
Accent Signage Systems is the producer and patent-holder of the Raster™ Braille system, which creates Braille characters by inserting spherical beads into a hard substrate. They also produce and distribute a number of other tools and materials for ADA sign-making.
