Although they may seem redundant, buttons on pedestrian crossings are vital for disabled people to know when it is safe to cross.
Most UK crossings beep when it's safe to cross (for the blind), and have small jagged cones[1] on the bottom that can be felt spinning around in your hand (for the deaf and blind).
Most UK crossings beep when it's safe to cross (for the blind), and have small jagged cones[1] on the bottom that can be felt spinning around in your hand (for the deaf and blind).
[1] http://ichef.bbci.co.uk/news/660/media/images/67872000/jpg/_...