Robert,
ALL of the major industrial area's have ways of moving freight at one will call the most efficient means. Oz probably does not have too many track trains. As here in the NA, they criss cross all over and are the choice for moving 100's if not 1000's of tons at a time. In OZ, it seems the best way to cross the continent is by truck train of 3-5 trailers. I doubt you will ever see such a creature here. Nor do I believe you see those types in Europe. Maybe Asia in Russia or China. Not too many other places.
Actually, while typing, A few states around Nevada, Oregon etc, allow triples, IIRC the max length is 120'. So you will not see three typical 60' trailers hooked to the same tractor. But you could see three 30-40' trailers, or 2 60' trailers attached to ea other in those area's. I see two smaller trailers frequently around my area. With the railroads, no need for larger double ro triple trailer setups for the most part.
ALL of these area's have to build roads to meet the lbs per inch width/sq etc put on the roads. I'd have to do some figuring to see if those trucks posted would truly meet our regs. With that in mind, I have seen pics of upwards of 500 ton setups being moved on our roads. Again as I said above, one needs lots of permits etc.
Best to realize, EVERY corner of the world has different specs and needs to traveling etc.
Altho, some of the smaller RV setups in OZ would be nice to see in this part of the world.
marty