They changed the shape of the ’braille blocks’ on the inner part and outer part of the railroad crossing to make them (visually impaired people)know that they are in the inner part of the railroad crossing (the part between the two tracks).
They changed the shape of the ’braille blocks’ on the inner part and outer part of the railroad crossing to make them (visually impaired people)know that they are in the inner part of the railroad crossing (the part between the two tracks).