Re: Learn from aviation
"If you really need green arrows pointing the way around the car in front, you shouldn't be driving."
Judging by the view out of the windscreen, which is what the driver should be using as the primary information source, I'd say that green arrow in the picture is a turn or lane assist notification. The clue is in the road signs on the gantry. It never even crossed my mind that the car navigation system might be telling the driver when and how to overtake.