That shell petrol tanker arrangement is a fairly common sight out west. There are lots of little towns with hundreds of kms in between, and they all have servos that need fuel, so the road trains do the run.
You should try overtaking one of those suckers. Can be quite a job on a dirt road, but you dont want to sit behind one either. They leave a dust cloud two miles long.
They may say everything's bigger in Texas, but 'they' obviously havent been to Australia.