Curious about maximums for "road trains" and found this info.
"Australian road trains, also known as long combination vehicles (LCVs), have specific maximum length and weight regulations depending on the type of road they are traveling on. A proper "Road Train" consists of two or three normal trailers connected by converter dollies, with a total length between 36.5 and 50 metres.
With a special permit, an A-B quad can be up to 53.5 metres long, which is the maximum allowable on normal roads.
However, on private roads and mining roads in Outback Australia, even longer rigs can be found.
In terms of weight, Australian road trains can weigh up to 200 tonnes (197 long tons; 220 short tons).
Additionally, Higher Mass Limits (HML) schemes in Australia allow trucks to carry additional weight beyond general mass limits, with some roads permitting up to 136 tonnes (134 long tons; 150 short tons).
On private property, such as mines, there may be no restrictions on trailer length, weight, or count."
