The devil is in the detail and each state is different.
NSW.
You are obliged to carry your licence
You are obliged to stated your name and address and specimen of signature if required.
You are obliged to provide a breath test, or a urine/blood sample if it is so required.
You are obliged to provide your version of events in an accident.
You are obliged to surrender your licence, number plates or car if so directed.
It goes on and on. The Road Transport legislation has some of the widest ranging powers that police have.
Supplying details of your passengers, whereabouts etc are not required, unless it involves an indictable offence.
So if you get stopped for a RBT, it can involve a lot of powers.