look left
check my reply to you on the other post. 4.3m is the maximum. Vehicle dimensions are defined by ADR 43/04 which is managed by a department of DIRD which I believe is in the same building as the ATSB.
As it happens, I'm on the phone to the head of vehicle standards at Vicroads on another matter, but he has confirmed 4.3m is the height limit unless the vehicle has an exemption, where there are restrictions on the roads that can be driven on.
4.6m is the recommended clearance for roads, which is a very different thing.