Maybe it can't be done in the US, for various cultural, bureaucratic, and legal reasons, but it has been done successfully in other parts of the world. http://

Maybe it can't be done in the US, for various cultural, bureaucratic, and legal reasons, but it has been done successfully in other parts of the world. http://ontheworldmap.com/japan/city/tokyo/tokyo-rail-map.jpg http://ontheworldmap.com/japan/city/tokyo/tokyo-rail-map.jpg