DISPOSITION
27 I would grant leave to appeal and uphold the appeal for reasons which can be shortly stated.
28 There was simply no evidence that the respondent would have been deterred from the course he took leading to his accident by the erection of a sign. The onus lay on Mr Kitt as plaintiff to satisfy the trial judge, on the balance of probabilities, that if a sign suitably worded warning of the danger had been erected either at the commencement of the track or near the blind corner, Mr Kitt would have either (a) refrained from driving on the track at all, or (b) would have done so more slowly so as to avoid the accident that befell him when he turned the blind corner.
29 There was no precise evidence as to the distance of the mound from the blind corner beyond the evidence from Mr Kitt. His evidence was that he first noted the pile when "roughly "20 to 30 metres from [the mound]". This rough estimate was, moreover, made when travelling at 40 to 50 kilometres on a rough and muddy dirt track on his trail bike. The fact that he was approaching a blind corner should have alerted him to an obvious danger and caused him to slow down earlier. That danger was that there could be an obstruction of whatever kind in that semi-rural area, one which he would only be able to see after he turned the corner.
30 Recently the Court of Appeal in Wyong Shire Council v Vairy; Mulligan v Coffs Harbour City Council [2004] NSWCA 247 considered the principles applicable to signage in circumstances of obvious danger or risk. That danger was from diving into water in a creek of unknown and variable depth, which turned out to be too shallow. I shall give a summation of those principles as they were articulated by Tobias JA, with whom Mason P and Beazley JA agreed:
(1) A danger is obvious where both the condition and the risk are, in the individual circumstances of the case, apparent to, and would be recognised by, a reasonable person in the position of the plaintiff exercising ordinary perception, intelligence and judgment; [161].
(2) The risk was defined as that of striking a "transient dune" naturally occurring on the bed of a tidal creek of variable depth, where the water was of unknown depth; [200].
(3) In those circumstances, this was an obvious danger; [201], [211].
(4) In the application of the Shirt calculus the fact that a danger is obvious is merely one factor to be considered when determining the scope of the owed duty. However, in a given circumstance, the presence of an obvious danger may be determinative especially where the only breach alleged is a failure to warn; [72]-[73], [168], [195].
(5) The circumstances were such that the knowledge of the relevant danger on the part of the occupier-defendants, whether actual or assumed, was neutralised by the obviousness of the risk of injury attaching to diving into water of variable and unknown depth, given that such risk was apparent to the plaintiffs. In these circumstances the scope of the occupier-defendants' duty did not involve a duty to warn or prohibit diving; [206],
(6) In the circumstances the failure to warn, or to take any other steps, did not constitute a breach of any duty of care owed to the plaintiff. The plaintiff failed to take proper care for his own safety in the face of a risk that was obvious in the circumstances; [202], [209], [215].
31 These principles can be directly translated into the obvious danger to a trail-bike rider of approaching a blind corner at considerable speed, in no way moderated by the wet and muddy conditions that stopped his companion. It should have been obvious that there was a risk of encountering some obstruction around that corner, and of being unable to stop safely in time, even if the nature of that obstruction could not be reasonably foreseen. That is very different from the circumstances encountered by a parent whose child wandered off in a picnic area and fell down a cliff, where the risk of concealed cliff edges was not obvious, and there were no warning signs; Ah Tong v Wingecarribee Council [2003] NSWCA 381. There was held to have been no carelessness on the part of the parent in relation to that concealed danger, lacking warning of any kind. There was also direct evidence (overlooked by the trial judge but emphasised by Giles JA and Ipp JA on appeal) of what the parent would have done had there been such warning signs placed in the picnic area alerting users to the existence of cliff-faces nearby. The father would never have exposed his young child to any risk at all, even just a bush walk. The Court of Appeal upheld an appeal by the parents, concluding that the evidence "did not justify a finding that there was an obvious risk that dangerous cliffs or quarries might be relatively near the picnic area on the track along which [the plaintiff] and his children walked"; Ipp JA at [63]. Here there was simply no such evidence to ground an analogous conclusion.
32 Nor is this a case where there could be any justification for eliding the requirement to establish causation. The plaintiff retains the onus of establishing on the balance of probabilities that the injury would not have occurred had an appropriate warning sign been erected. It was never satisfied.
33 Recent UK authority has in particular and exceptional contexts taken a different approach, excusing proof of causation. The basis for doing so has been where exceptional circumstances render this necessary to "accord with one of the most basic aspirations of the law, namely to right wrongs" (Lord Steyn in Chester v Afshar (2004) 3 WLR 927 at 936 [25]. But Australian Courts, exemplified by Mason P in TC v The State of New South Wales & Ors [2001] NSWCA 380 at [58] have not taken that aspirational approach.
34 But in any event, the exceptional contexts which have so far led courts in the United Kingdom to go further in eliminating or lowering the causation hurdle, are far from the circumstances here. Thus in Fairchild v Glenhaven Funeral Services Ltd [2003] 1 AC 32, the context was of an employee who suffered mesothelioma which must have been incurred in the course of employment at one of three employers. But it was not possible to determine from which employer the fatal ingestion of asbestos fibre occurred, though cumulative exposure increased risk and each employer was careless. The House of Lords concluded that denial of a remedy against any employer would be unjust.
35 More recently in Chester v Afshar (supra), the House of Lords concluded by majority that in the case of a failure to warn of a surgical risk albeit of slight magnitude, it was not necessary for the plaintiff to establish that, warned of the risk, he or she on balance of probabilities would not have undertaken the operation. Various reasons grounded in policy were cited. These included the danger of unfair discrimination against an honest plaintiff who could not say with sufficient certainty whether or not he or she would have undertaken the operation had the warning been given of the particular risk involved.
36 The circumstances here are not in any way comparable. The issue is simply whether a warning notice would have deterred the plaintiff from undertaking an obvious risk in travelling around a blind corner at the speed he did. That the risk was obvious obviated any real likelihood that a warning sign would have had any effect, a conclusion more easily reached in the absence of any evidence to the contrary from the plaintiff. Moreover, there was simply no evidence of what kind of sign would have been appropriate or where. One cannot even begin to answer the unavoidable question, what would the plaintiff have done had warning been given, without such evidence.
37 Since preparing these reasons I have had the advantage of reading the judgment of Giles JA and agree with his observations.