Let's assume it's on a freeway then in NSW. The Road Rules 2008 state:
177 Stopping on a freeway
(1) A driver must not stop on a freeway unless:
(a) the driver stops in an emergency stopping lane, or
(b) the driver’s vehicle is permitted to stop on the freeway under another law of this jurisdiction.
Maximum penalty: 20 penalty units.
Note 1. Driver’s vehicle is defined in the Dictionary, and emergency stopping lane is defined in rule 95.
Note 2. Rule 178 sets out when a driver can stop in an emergency stopping lane.
(1–1) This rule does not apply to:
(a) the driver of a truck while stopped in a truck parking area, or
(b) the driver of a public bus used to provide a public passenger service, while stopped:
(i) in a bus parking area, or
(ii) in a bus zone or at a bus stop to drop off or pick up passengers, or
(c) the driver of a vehicle who is authorised to maintain facilities in a bus parking area, while stopped in the bus parking area for that purpose.
Note 1. Bus parking area, public bus, public passenger service, truck and truck parking area are defined in the Dictionary. Bus zone is defined in rule 183 (2). Vehicle is defined in rule 15.
Note 2. This subrule is an additional NSW subrule. There is no corresponding subrule in rule 177 of the Australian Road Rules.
(2) A freeway is a length of road to which a freeway sign applies.
(3) A freeway sign on a road applies to a length of road beginning at the sign (including any road into which the length of road merges) and ending at the next end freeway sign on the road.
So I would say, no he can't stop there. But, if he is claiming he is fatigued and a possible danger to himself and others, then a duty of care would prevail and make the officer liable to a degree. So, if he drove off, had and accident and survived, was able to identify the officer and convince the judge that he is telling the truth (because the officer will probably claim he did no such thing) then he may be able claim compensation form the state under the law of tort. My thought only
Yes i'm bored tonight