obvious figure/ground relationship

In this picture the stable figure would be the awareness light attached to the bus. I came to this conclusion to the fact that the light has more of a dominant factor within this image. In addition this awareness would identify as a geometric shape for the obvious appearance to one’s eyes .This object has detailed lines  to the figure at hand.
The journey of this item comes from when more modern buses was made within different eras of time. I truly think this came in place for many factors. One would be to let other drivers know that the bus will be turning. The specific location of this item will be found on different  angles on the bus to allow others to know the movements of the bus. Also the second reason would be for awareness. I believe this bus like many others would be in accidents at night. Due to this misfortunate we’ve installed blinking lights to catch the attention of many from a close and far range.