If you can determine the function of the line connecting the rear roof blob (technical term) to the aft port (HA!) wheel, you will probably be able to answer your question.
At first I thought it may be tracking wheel rotation to determine distance, but distance without heading not much good, and GPS would be much easier.
I’m guessing it has something to do with an automated car.
I think it’s much more likely that it has something to do with Apple mapping/3D street view or something like that. In fact, it cannot be an automated car because “analyst” Rob Enderle was the first person to suggest it was an automated car (his only reasoning was that it had a lot of cameras), and it is an established scientific universal concrete fact that Rob Enderle is always wrong about everything he says about Apple.
Yeah, for us it was the mysterious bee that hovered in front of the house after my father revealed state secrets and then my friend looked on the internet and showed me how the government had spent millions to send up a satellite to take a picture of me, and I swear all I was doing was watering the pansies.