I think the ADA regulations for signs need some serious attention. The regulations require them beside doors of permanent rooms, but if you're blind, how do you find the room?
If you walk into a commercial office building that's 10 stories tall, the directory isn't braille. So how do you know that Dr. Checkmyeyes is on floor 7? Okay, so someone tells you it's on floor 7. You can navigate into the elevator and to the 7th floor because that's all required to be braille. You step off the elevator. Now what? You need suite 732. Where's that? How do I know what direction to go? Do I have to start at the wall outside the elevator and feel my way around the entire floor until I find it?
It's insane and one of the biggest wastes of money out there. We've done more ADA signs than I can count and I can honestly say that in all my time in buildings, I have NEVER seen a blind person using the signs. I've seen a number of blind people, but none of them using the signs.
Oh, and if you're blind, how'd you get to the building? Most of the time, blind people bring someone with them to get them to their appointments.
And another thing- a lot of those off the shelf braille signs for $13 a pop are WRONG. Look up "RESTROOM SIGNS" and look at them. You'll see various signs, that says "MEN" and you'll see different braille for the same text. The regulation is pretty clear on it, but you'll see more that are wrong that right.