In technology terms these displays are replacements of static citylight displays with a built-in portrait-orientated LCD display and depth sensor to enable interactive content to be displayed and to detect user behaviour.

Our idea was to adopt responsive design to such interactive citylight displays. While responsive design usually deals with different screen sizes, designing for Responsive Citylight we researched on passive user behaviour, for example the user`s distance from the screen.

For example, if you are 20 meters away from a normal citylight there is no chance that you can read the small text. Similarly, when you are 50 cm close to it, there is no use of displaying a 2 meters to 1 meter photo. We solved this problem by providing the right layout for every situation. If you are close to it, it provides details, small texts by rearranging the layout. When you get far from it the whole view will change into a large inviting photo with short slogan.

We developed three prototype variations, a bus information application for bus-stop citylights, an interactive poster with rearranging layout and an interactive poster with continuous animation.

We used Awesomium HTML UI engine and Cinder library for C++ to prototype the application.