Subway officials in Shanghai are looking into the feasibility of adding light strips to subway walls that would create flip-book style animations, allowing for advertisements and entertainment.

Static images would be created with lights along the subway tunnel, and as the train moves past the images, it will create the illusion of a moving animation. City trains run on average at a speed of 35 kilometers per hour, so a 15-second animation would require 300 pictures created by 30,000 lights.

A trial program is expected to be set up by the end of the year along Metro Line 2, and officials expect the program to be welcomed on longer lines, such as Metro Line 11 and Line 2, which are both still under construction but will stretch for more than 100 kilometers. Shanghai expects to have 400 kilometers of subway lines by 2010.