Some Aussie roadtrains

This is what is known as a pocket roadtrain because it isn't as long as a full size outback roadtrain. They are used for hauling grain in rural areas. Previously only B trains were allowed but more and more routes are being opened up for these type of A trains. They have the same capacity as 2 full size semi trailers.

 

I came across this website that pretty well explained it all
http://www.vintageroadhaulage.com.au/faq/what-is-a-road-train/
The intakes are up high partly to keep out dust, they're away from engine heat (our engines are always working hard because of the weights we haul) and they look cool.

 

I'm only guessing but I think it's around 30 metres, so strictly speaking it's borderline pocket but definitely not full size 36.5m. It was registered in Victoria too, and they don't allow roadtrains there, though they've got Super Bs running around Portland. They carry 2 x 40' containers with a quad axle under the first trailer.

 

This is a brand new tri-drive A-B Double at the Perth, Western Australia 2015 Truck Show. It is a B train towing a trailer with a converter dolly. It is one of a fleet used for hauling bulk ammonium nitrate to the mines in the north west.
This combination can go right into the Perth industrial area.
If they want to, they can add yet another trailer and dolly once they get to the 53.5 metre road train route, but as far as I know they aren't doing that at the moment.
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I came across this video by one of our truck mags where they road test a new Kenworth T909 hauling triples. Not a bad indication of what goes on over here.