If you stroll the along sidewalks of Hiroshima and maybe in other places in Japan, you will observe a usually colored yellow pavement or lane/line in center. It is the safety line intended for the blind. They call it "truncated dome" or tiny bumper/tiny humps. The bricks are slightly elevated and loosely arranged so that the surface becomes irregular and can be easily noticed. See pictures:
http://www.thats-japan.com/images/sidewalks.jpg
http://blog.jpopdb.org/index.php/blog/japan/curiosities/yellow-safety-lines-in-japan
Along this line, connected on almost all street sides in a City, the visually different society can confidently stroll over the sidewalks, even at the least of none escorted. They will be on safety during their walk as long as they consciously follow the guide.
Such a nice effort on the the side of the authorities of the city/country to create such safety line for the blind. This effort is observed not only in Japan but also in other countries.