The decision of the primary judge
11 The primary judge's findings with respect to Mr Berryman's contributory negligence are contained in the following passages from his judgment (described by Gummow and Callinan JJ in their joint judgment (at 1244 [61]) as comprising "generous findings in favour of Mr Berryman"):
"In this case I believe I am required to examine the Plaintiff's capacity to judge the condition of Miss Joslyn, over a period which started well before he went to bed on Sunday morning and continued up till the time she commenced to drive. That includes his exposure to Miss Joslyn for the best part of one hour whilst they travelled to Mildura and back. The evidence I have recited shows that in that time he ought to have recognised her capacity to drive was affected by her excess consumption of alcohol and the other factors referred to by Professor Starmer which included fatigue and lack of experience.
Having made the decision, along with others, before the party commenced, to stay overnight at the party, the Plaintiff should have had in contemplation that he might have to later become a passenger in his own motor vehicle because of the alcohol he anticipated consuming. Although I think he did not give the matter consideration, he should have contemplated his vehicle might be driven by Miss Joslyn who was his companion for the evening and ought to have considered the prospect of a journey such as that undertaken to Mildura. He did not do so. He had no regard to the consequences of his own alcohol consumption but more significantly, as it turned out, despite saying in evidence he would not have allowed Ms Joslyn to drive, because of his knowledge of her alcohol consumption, he did just that. It was obvious to him before he went to sleep that Miss Joslyn would not be fit to drive on the following morning. I believe, at the time of changeover of drivers, he did not consider that issue, but should have done so and was capable of so doing. The failure to take these matters to account was contributory negligence. The Plaintiff ought also to have realised the lack of experience and qualifications of Miss Joslyn particularly given his knowledge of the propensity of his vehicle to roll over.
My assessment of the degree of the Plaintiff's contributory negligence has been reduced from what it would otherwise be because I find, on the basis of the evidence to which Mr Barry referred and I recorded earlier, at the time of the hand-over Miss Joslyn exhibited none of the obvious signs of intoxication which one would expect to be present. That, it seems to me, could have influenced the Plaintiff if he had properly put his mind to the issue of Miss Joslyn's capacity. It warrants a reduction in the assessment of his contributory negligence which, but for that factor, I would have fixed at 33?%. The level of reduction would be the same against both defendants there being no real difference in their arguments and in the defences pleaded on this issue. I find it appropriate to reduce the Plaintiff's verdict by virtue of his contributory negligence by 25%. His verdict against both defendants will be reduced accordingly…"
12 It will be appreciated from the foregoing that the primary judge generally adopted an objective approach in his determination of whether Mr Berryman was guilty of contributory negligence as well as in his assessment of the percentage by which his verdict should be reduced as a consequence thereof. This Court in the original appeal had held that the primary judge erred in so doing upon the basis of the subjective features relating to Ms Joslyn of which Mr Berryman was aware at the time he handed over control of the vehicle to her. In particular, this Court held that Mr Berryman was not guilty of contributory negligence because it found that he was not aware that Ms Joslyn's ability to drive the vehicle was impaired at the time that he became a passenger. As McHugh J observed at 1236 [14]:
"They [the Court of Appeal] evidently took the view that, at least in a case like the present, the contributory negligence of a plaintiff has to be evaluated by reference to what the plaintiff knew or could have observed when he or she became a passenger."
13 All the justices of the High Court were of the view that neither the common law test (which governed the issue between Mr Berryman and the Council), nor s 74(2) of the Motor Accidents Act (which governed the position as being between Mr Berryman and Ms Joslyn) was so limited but, on the contrary, the proper test was an objective one. Accordingly, the fact that Mr Berryman was unaware of Ms Joslyn's impaired ability to drive did not necessarily prevent a finding that he was guilty of contributory negligence under either s 74(2) or at common law.
14 McHugh J stated the issue in the following terms (at 1241 [38]):
"Hence, the issue is not whether a reasonable person in the intoxicated passenger's condition - if there could be such a person - would realise the risk of injury in accepting the lift. It is whether an ordinary reasonable person - a sober person - would have foreseen that accepting a lift from the intoxicated driver was exposing him or her to a risk of injury by reason of the driver's intoxication. If a reasonable person would know that he or she was exposed to a risk of injury in accepting a lift from an intoxicated driver, an intoxicated passenger who is sober enough to enter the car voluntarily is guilty of contributory negligence. The relevant conduct is accepting a lift from a person whose driving capacity is known, or could reasonably be found, to be impaired by reason of intoxication."
15 It was suggested during the course of the remitter hearing before us that it might not be in every case that the "ordinary reasonable person" who is a passenger must be assumed to be completely sober. What, for example, would be the position of a mildly inebriated person who decided to call a taxi? It is, however, unnecessary to pursue that issue further as it was accepted by all parties that it was appropriate to make that assumption in the circumstances of the present case. Accordingly, McHugh J considered ([39]) that:
"…the fact that the passenger's intoxicated condition prevents him or her from perceiving the risks attendant on driving with an intoxicated driver does not absolve the passenger from complying with the standard of care required of any ordinary reasonable person."
16 His Honour then considered that the primary judge was correct in finding Mr Berryman guilty of contributory negligence at common law. He expressed his reasons for that finding in the following terms (at 1242):
"40. Once it is accepted that the relevant circumstances were not confined to what Mr Berryman perceived or should have perceived when he became a passenger in his vehicle, a finding of common law contributory negligence on his part is inevitable. The relevant facts which an ordinary reasonable person would know or would infer point overwhelmingly to Mr Berryman's lack of care for his safety in becoming a passenger. First, Ms Joslyn had lost her driver's licence and probably had not driven for some time. Second, she was insisting on driving a vehicle whose speedometer did not work and which had a tendency to roll over and she had no experience of driving the vehicle. Third, Ms Joslyn had been drinking for about the same length of time as Mr Berryman who was unfit to drive. Fourth, the amount of alcohol consumed by Ms Joslyn, the time that had elapsed since she stopped drinking and her lack of sleep confirmed that she also was probably unfit to drive. Mr Berryman's inability to keep awake and his agreement to stop driving increased the probability that her drinking and lack of sleep made her unfit to drive.
41. Upon these facts, a reasonable person would have foreseen that, as a passenger in a car driven by Ms Joslyn, he or she was exposed to a risk of serious injury as the result of the defective nature of the vehicle, her drinking, her lack of sleep, her probable lack of recent driving experience and her lack of experience of driving this defective vehicle. Moreover, there was no reason why the hypothetical ordinary person, as the owner of the vehicle, could not have parked it by the side of the road until he or Ms Joslyn was capable of driving. In those circumstances, the learned trial judge was correct in finding Mr Berryman guilty of contributory negligence at common law."
17 In their joint judgment, Gummow and Callinan JJ considered that this Court erred in substituting a subjective test of the reasonableness of Mr Berryman's conduct for the objective test that s 74(2)(b) of the Motor Accidents Act required and that the common law, which posited the standards of a reasonable person, also required: see 1247 [73]. Their Honours also considered that this Court had "manifestly erred in fact". They said (at 1247 [75]):
"Both Mr Berryman and Ms Joslyn were undoubtedly intoxicated from at least 4am on the day of the accident until, and after the accident. Despite that evidence was given that Ms Joslyn was not in fact manifesting obvious signs of intoxication not longer after the accidents, it seems to us to be highly unlikely that signs would not have been there to be seen by those able to see, or not otherwise distracted by more pressing concerns. However, in view of the clearly objective test posed by s 74(2)(b) of the Act, of what the injured person ' ought ' to have known, it is unnecessary to explore that matter any further."
18 Kirby J evaluated the factual issues in the following passages of his judgment (at 1259-1260):
"144. The mere fact that, at the time Ms Joslyn took the keys and accepted Mr Berryman's express or implied invitation to drive his vehicle, she did not appear to be affected by alcohol intoxication is much less significant in this case than it might be in other factual circumstances. If, for example, a passenger without knowledge of a driver's insobriety, accepted an invitation to trave in a vehicle, the initial appearances of the driver could be very important to the statutory question of what was "just and equitable in the circumstances of the case". Similarly, it could be important to what a court thinks is "just and equitable having regard to the claimant's share in the responsibility for the damage".
145. Such considerations were scarcely determinative in Mr Berryman's case because, before he became seriously inebriated as he did, he was able to, and did, observe Ms Joslyn engaged in a similar pattern of extended consumption of alcohol. Although Mr Berryman went to sleep at 4.00 am, and may not have seen Ms Joslyn, as described, "staggering drunk" at about that time, it cannot seriously be suggested that it was not open to the primary judge to infer that Mr Berryman was aware of her extensive drinking. Her deceptive appearance of sobriety at the time he offered her his keys and exchanged positions with her at the wheel, whilst not irrelevant, could not in the circumstances enjoy the factual significance which the Court of Appeal assigned to them. Other witnesses who saw her after the accident might say that she showed no signs of intoxication. But Mr Berryman knew differently. This will commonly be the case where a driver and passenger have engaged, together or close by, in an extended bout of alcohol consumption over a continuous interval."
19 Hayne J agreed that the appeal should be allowed but considered that no error had been shown in the primary judge's apportionment of responsibility to Mr Berryman at 25%. However, his view on this issue did not command a majority as the other justices did not decide that issue but remitted it to this Court for determination.