Sighted people can see the (much more convenient) lighted sign that says "cross/don't cross". A tactile device is unnecessary for those people, and it doesn't r

Sighted people can see the (much more convenient) lighted sign that says "cross/don't cross". A tactile device is unnecessary for those people, and it doesn't really matter if they know that it exists or what it is for. As such, I would say the biggest design priority with respect to the sighted majority would be to make sure it's not actively confusing (i.e. it won't be mistaken for the cross button), and visual cues as to its purpose would be above and beyond.