An owner or occupier of land adjoining a road has a duty of care to the relevant road authority, infrastructure managers, works managers and road users—
(a) not to do anything on or in relation to the land which affects; or
(b) not to allow the condition of the land to affect—
the support the land provides to the road to the extent that the stability of the road, the safety of road users or the condition of any infrastructure on the road is affected.