Point of impact
16 In written submissions in support of this part of this appeal, it was said that the trial Judge's methodology was to take as his starting point a piece of evidence which he regarded as non-contentious, namely that the respondent's vehicle had come to rest on the southern side of Stoney Creek Road, approximately opposite the mouth of Staples Street. By reference to the damage to the respondent's vehicle and expert opinion, his Honour concluded that the respondent's vehicle could not have travelled more than one hundred metres following impact and, accordingly, the impact occurred on a curve approximately in line with the eastern kerb alignment of Wolli Street. It was submitted by counsel for the appellant, Mr Maconachie QC, that:
"While the appellant generally accepts that it was open to his Honour to follow that reasoning process, he challenges his Honour's start point, ie that it was not in dispute that the respondent's vehicle came to rest opposite the mouth of Staple [sic] Street. This was a contested issue, and his Honour was wrong to commence his process of reasoning on the basis that this had been established as an undisputed fact."
17 In his submissions, Mr Maconachie, conceded that the collision did not occur where the appellant claimed in his evidence, namely on a flat and straight stretch of Stoney Creek Road outside the Bexley Golf Course Clubhouse. Further, Mr Maconachie accepted that it was open for the trial Judge to find that after the collision the respondent's car was in such a state, notably with the front driver's side wheel at least partially detached and facing towards its right with the tyre partially removed from the rim which was damaged, that it could not continue to travel for a very great distance. Judge Cooper observed:
"One does not have to be an engineer to appreciate that this would make steering of the car impossible and would also cause the car to veer towards its right at a reasonably sharp angle, subject to the effects of its pre impact forward motion."
18 Mr Wiltshire, an engineer engaged by the respondent, described the bar protruding from the front driver's side corner of the damaged car as "the tyre [scil tie] bar which is part of the suspension and locates the wheel to the chassis." He confirmed that with this damage there would be no ability to steer the car. His Honour said:
"54 … He [Mr Wiltshire] also pointed out that the steering linkages are towards the back of the wheel and, whilst they cannot be seen, he would expect that if there is as much damage to the front of the suspension as is shown in the photograph, then there would be damage to the steering mechanism. It was his opinion that that front driver's side wheel would be unable to rotate freely because of the pressure of the body damage upon it and this would give rise to tyre marks on the roadway and the dragging of the vehicle sideways to its right.
55 In his report of 2 October 2003, part of Exhibit G, he states that he inspected the accident site on 14 September 2003. He measured the distance from the centre of the golf club house to the centre of Wolli Street at 120 metres, and from the centre of Wolli Street to the centre of Staples Street at 110 metres.
56 In an attempt to determine the more likely of the two alternative collision zones, he calculated the drag co-efficients for the two zones and conducted tests to measure the drag co-efficients of vehicles with front-side damage similar to the collision damage sustained by the plaintiff's vehicle. By comparing the calculated co-efficients and the results of the tests, he concluded that the test results were consistent with the collision having occurred in the region of Wolli Street and not outside the club. In his report he also points out that, based on the photographic evidence, he would expect that the vehicle's braking ability would be greatly reduced, if not ineffectual. He concluded that, whereas it is possible for the collision to have occurred near Wolli Street, it is extremely unlikely for it to have occurred outside the clubhouse. I should mention here that his views are supported not only by mathematical calculations but also by the results of tests performed with four other similarly damaged vehicles which he described in his report.
57 A report from Mr Booth, dated 10 February, 2000, part of Exhibit G, after considering the photographs, the nature of the road surface, the grades and curves involved and performing some mathematical calculations, expressed the opinion that the plaintiff's vehicle would not travel 200 metres after the point of impact due to its probable stopping distance, nor could it negotiate the curve in Stoney Creek Road due to the loss of steering control. It concludes, having regard to the level of damage and the combination of camber and grades, the probable point of impact was east of the exit side of the curve in Stoney Creek Road as the plaintiff proceeded east."
19 The appellant did not challenge the conclusions the trial Judge drew from Mr Wiltshire's report beyond saying in ground 2 of his notice of appeal:
"That his Honour erred in the blanket rejection of the opinion of the Appellant's expert, Mr Jamieson, including his 3D simulation of the accident, in that his Honour failed to appreciate that the 3D simulation depicted how a prime mover and trailer would move if crossing onto the incorrect side of the road, ie by way of a broad parabola rather than by way of a sharp, serving movement."
20 The trial Judge said:
"61 It is clear from the damage to both vehicles that, at the time of the impact, they were very close to being in line. I agree with the conclusion of Jamieson Foley in its report of 27 May, 1999 that -
'It is quite evident that the Holden impacted the right front corner of the semi-trailer engaging its bulbar, its right front wheel, fuel tank and twin drive wheels at a shallow angle, with an overlap of no more than 200 mm to 300 mm.'
62 Jamieson Foley then conducted a 3D computer simulation of 2 different scenarios one where the plaintiff's vehicle was on its correct side of the centre line and the other where the defendant's vehicle was on its correct side of that centre line.
63 In effect, Jamieson Foley delegated to a computer the very task which they were required to perform. One does not know all of the information which they fed into the computer, nor does one know the methodology applied by the computer program to give its result. Such simulations may be interesting but they are only as good as the data fed in and the methodology applied by the operating program. With certain exceptions these are not known."
21 Neither the appellant's written nor oral submissions threw the slightest doubt upon his Honour's process of reasoning. In short, once the evidence of Senior Constable Mood and Buddy Hadid was accepted that the respondent's vehicle came to rest opposite the mouth of Staples Street, inevitably on all the calculations the point of impact must have been in the area of the mouth of Wolli Street where, travelling west as the appellant was, the road was climbing and turning away to the left before it came to the straight and flat piece of road outside the golf clubhouse. As his Honour said, the distances measured were relevantly, moving in an easterly direction down Stoney Creek Road, 120 metres from the centre of the golf clubhouse to the centre of Wolli Street and 110 metres from the centre of Wolli Street to the centre of Staples Street. In my opinion, on the evidence, the trial Judge's findings about the point of impact and about where the respondent's car eventually came to rest were not only open to him but were inevitable. Nothing said in the submissions put to this Court raised any doubt about these findings.