The Road-Trains in the Australian Outback are some of the biggest and longest in the world. Although most road-trains are three trailers long, some can have as many as 7 trailers and carry as much as 417,000 pounds.
A is a B-double.
B is a B-triple.
C is a double road train. A “Pocket road train” is similar, but with shorter trailers and dolly drawbar.
D is an AB-triple.
E is a BAB Quad.
F is an ABB Quad.
G is triple road train.
H is a 2AB Quad.
K represents the largest road trains operating in Australia and the world.