This is an interesting example of public display, which is quite common in Tokyo. These are steps leading to Ginza subway line at Shibuya station. As you dash toward the station gates during the rash hour you can check how long it takes from Shibuya to station you need to go, written in green, as well as how much it would cost.
Money part used to be important becasue if you know in advance how much change you need to prepare you would not slow down others at the ticket machine. These days, however, everyone is using electronic cash (i.e. Suica) and you do not need to know how much you have to pay. Its all done automatically.