19 The main points that arise from these observations are: first, that on any view it can be said that grass, reinforced or not, is more slippery than asphalt; secondly, that that is particularly so when the grass is wet; thirdly, that on any view these works will result in there being two quite different surfaces within the carriageway - namely, reinforced turf on one side and asphalt on the other; and fourthly, that throughout the length of the reinforced turf there are pegs, some of which are raised above surface level. Finally, from the point of view of the user of the carriageway, I do not think that there is serious room for doubt that reinforced turf is inferior to the existing asphalt carriageway. That is not to say that it may not be possible to have reasonable access to the dominant properties over a reinforced turf carriageway, but that, for the purpose of use of the carriageway, there is very little room for disputation that asphalt is a superior surface to reinforced turf.
20 Against that background, I turn to the legal position. Some of the relevant principles are clearly established. First, a servient owner has no obligation to construct a right of way granted over its land. Its obligation is limited to the negative one of not obstructing the dominant owner's reasonable use of the right of way [Spear v Rowlett [1924] NZLR 801].
21 Secondly, a dominant owner is entitled to construct a road over the site of a right of carriageway [Newcomen v Coulson (1877) LR 5 Ch D 133, 143-4 (Jessel MR); Mills v Silver [1991] Ch 271, 286-7 (Dillon LJ); Gerrard v Cooke (1806) 2 Bos & Pul (NR) 109; (1806) 127 ER 565; Senhouse v Christian (1787) 1 Term Rep 560; (1787) 99 ER 1251; Zenere v Leate (1980) 1 BPR 9300 (McLelland J); Butler v Muddle (1995) 6 BPR 13,984; [1996] ANZ ConvR 147; (1995) NSW ConvR 55-745 (Young J); Kirkjian v Towers (NSWSC, Waddell CJ in Eq, 6 July 1987, unreported); Sertari Pty Ltd v Nirimba Developments Pty Ltd [2007] NSWCA 324, [9]; Lawrence v Griffiths (1987) 47 SASR 455]. This is an ancillary right of a dominant owner: incidental to a grant of a right of way, the grantee may enter on the easement to do whatever is reasonably necessary to make the grant effective - including, in the case of a right of carriageway, not only repairing it but making a road so that there is a serviceable carriageway over which vehicles can pass in poor conditions as well as in good weather. These cases establish that the right to construct a road includes a right to pave.
22 Thirdly, however, that right is limited to what is reasonably necessary for the effective and reasonable exercise and enjoyment of the easement [Zenere v Leate; Prospect County Council v Cross (1990) 21 NSWLR 601, 607-8 (Bryson J); Butler v Muddle]. This is, in substance, the same concept as that of non-excessive user [cf Sertari Pty Ltd v Nirimba Developments, [11]-[20]].
23 Fourthly, a servient owner retains, in respect of his or her property the subject of a right of carriageway, all those rights of ownership that are not inconsistent with the exercise by the dominant owner of the rights expressly given or implicitly confirmed by the grant [Zenere v Leate; Prospect County Council v Cross]. The corollary is that a servient owner's rights are diminished to the extent that they are inconsistent with reasonable exercise by the dominant owner of its rights.
24 Fifthly, where an easement permits of the exercise of the rights granted in a number of different ways, generally the dominant owner is entitled to choose the manner of its exercise, and even to change that use from time to time. This may be illustrated in the context of a right of way that runs along the boundary of a property to which it is intended to give access and where there are multiple points from which access might be had from the right of way into the dominant land: in those circumstances, the dominant owner is entitled to select a reasonable number of points for that access, and even to change those points from time to time [Trewin v Felton [2007] NSWSC 851, [19], [36]; Butler v Muddle; Chiu v Healey [2003] NSWSC 857 ].
25 Sixthly, in a case of a private right of way such as the present one, only a substantial obstruction - that is to say a "real substantial interference with the right of way" - is actionable [Pettey v Parsons [1914] 2 Ch 653; Powell v Langdon (1944) 45 SR (NSW) 136, 139 (Roper J); Keefe v Amor [1965] 1 QB 334, 347 (Russell LJ); Prospect County Council v Cross, 608-610]. However, a substantial interference can be occasioned not only by physical impediment, but also by the existence of a state of affairs which creates a danger, or a risk, or a cost associated with user, such as to present an impediment to the dominant owner's freedom of decision to exercise, or to continue to exercise, the right of way [Prospect County Council v Cross, 610].
26 There is no evidence before me that expressly addresses the condition of the right of carriageway when it was created by registration of the Deposited Plan in 1971, but there is an available inference - from the apparent age and condition of the right of way depicted in the photographic evidence, and observed on the view held in the previous proceedings (to which the parties agreed I could have regard now), and from conventional planning practices, that the carriageway was probably constructed in its present form at the time of and in connection with the subdivision. On any view, the asphalt carriageway has been in place for many years. There is no evidence that there has ever been the slightest suggestion that its existence represented an excessive user, or was unreasonable.
27 Frasers Lorne has substituted for it something which I have found to be inferior, though it may still afford reasonable access to the dominant properties. Mr Hale SC, for Frasers Lorne, submitted that the real question was whether the alternative substituted by Frasers Lorne would meet the requirements of the grant and afford reasonable access in accordance with the terms of the grant; if so, the dominant owners were entitled to no more.
28 Attractive as this submission so stated is, I am, nonetheless, convinced it is wrong for the following reasons. First, it would be inconsistent with the right of the dominant owner to construct a carriageway on the site of the easement, if, the dominant owner having constructed a carriageway which was not excessive, the servient owner could unilaterally disrupt that carriageway and substitute an inferior one, even though it would still afford reasonable access. The right to construct a carriageway must include, for example, the right to select the contractor who will build it, the right to select the particular form of paving which will be used, and so on. It would make nonsense of this right if the servient owner could then decide that he or she did not like the particular form of paving and substitute an inferior one.
29 Secondly, as I have indicated by reference to the example of selection of access points from a right of way running along the side of a dominant property, authority indicates that, where there are multiple potential means of reasonable user, the choice is that of the dominant owner, not of the servient owner.
30 Thirdly, if Mr Hale's proposition were correct, the consequence would be that, from time to time - indeed as often as the servient owner pleased - the servient owner could contend that reasonable access could be gained by some construction other than that currently in place, and substitute that alternative construction. This would introduce into this area of property law instability and uncertainty, where certainty and stability are important.
31 Fourthly, and most importantly, the way the law operates in this area - as indicated by McLelland J in Zenere - is that the rights of the servient owner are diminished to the extent that they are inconsistent with the rights of the dominant owner. If what the dominant owner has done in constructing a carriageway is within the terms of the grant and not an excessive user, then anything the servient owner does inconsistent with what the dominant owner has done must be inconsistent with the dominant owner's valid exercise of his or her rights, and thus to that extent inconsistent with the grant. The servient owner's rights are extinguished or diminished by the grant to that extent. It is, therefore, not open to a servient owner to deconstruct a road constructed within the terms of the grant by the dominant owner, and to substitute some inferior construction - even if the inferior construction would still afford reasonable access - because to do so would be inconsistent with the dominant owner's valid exercise of its rights under the grant, including the right to construct the carriageway.
32 Finally, it is implicit in the grant of a right of carriageway that the surface of the carriageway, whether natural or constructed, will not be disrupted or degraded by the servient owner. Once a road has been constructed over the site of the right of carriageway, for the servient owner to dig it up in whole or in part and/or replace it with an inferior structure, is a disruption or degrading of the right of carriageway inconsistent with the grant.
33 In my judgment, therefore, and absent any special provision in the grant, a servient owner is not entitled unilaterally to change the surface of the carriageway to an inferior one, or otherwise to disrupt or degrade the surface of the carriageway. To do so would be inconsistent with the rights of the dominant owner to construct a carriageway to the extent reasonably necessary for the proper enjoyment of the grant (so long as the construction is a non-excessive user), and to enjoy access over the carriageway so constructed.
34 Accordingly, I have concluded that Frasers Lorne had no right to disrupt and change the surface of the road constructed on its part of the easement. To do so was inconsistent with the plaintiffs' right to have the constructed road over the easement persist in its current form.
35 The plaintiffs argued, quite apart from these considerations, that the removal of the asphalt and the installation of the reinforced grass was an actionable obstruction. If it were necessary to decide this - and for the reasons I have advanced I do not think it is - I would not accept that, save for the period during which the construction works took place, there is now any physical impediment. One can still drive over the access way, and it is unnecessary for pedestrian access for which the remaining sealed portion is ample.