the alllowable configurations are also determined by what area of the state,u operate in around here in my area, a 6x 4 prime-mover is allowed to tow 2 trailers , net pay load is 50tn, referred to as a long vehicle, down where aussie is the road trains are allowed will try and find some information and post the allowable lengths and config been too many changes since i got my licence
, everything has got bigger