Designing user interfaces is hard. It could take months to do and then another couple to find out that it's not working. All the sudden it's back to the drawing board.
So imagine designing one that's more or less permanent. One that isn't digital, but physical. Imagine designing one that is to be used in a whole country. Then design it for blind people.
I encountered this while in Japan. Most sidewalks in between train stations in Tokyo, Kyoto and elsewhere have specially designed yellow paths leading from one station to another. They lead right from train exit doors and ... Read More