If the bus stands still one can see the live CCTV footage from the street. Ass soon as the bus accelerates the CCTV footage cross fades into a sequence of zooming images that relate to the geographical location of the bus. The faster the bus goes the older the displayed images get.

Thus one gets to see varying sequences of images on different bus rides as the speed and acceleration of the bus changes according to the traffic jams and other external infulences.
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