How about:
"This Fox has every right to be on the road, if not more, because it is delivering the goods YOU require, and the driver is doing the best he can considering how difficult it is to wheel 40 tonnes of heavy vehicle through city traffic... now we don't expect you to have ANY comprehension of how difficult and frustrating this is, so just sit back, relax, and enjoy staring at my shiny metal arse. "
It would be a big sticker.
Yes I drive heavy vehicles.