Roads & Traffic Authority of NSW v Dederer & Anor

The High Court of Australia considered an appeal by the Roads and Traffic Authority of NSW (RTA) against a decision of the New South Wales Court of Appeal. The dispute concerned the liability of the RTA for injuries sustained by Ms Dederer, who dived from a bridge owned and maintained by the RTA into shallow water, suffering severe spinal injuries. Ms Dederer alleged negligence on the part of the RTA in failing to warn of the danger of diving from the bridge.

The central legal issue before the High Court was whether the RTA owed a duty of care to Ms Dederer in relation to the risk of injury from diving into the water from the bridge, and if so, whether that duty had been breached. The Court was required to consider the scope of the duty of care owed by a public authority in relation to risks associated with its property, particularly where those risks might be obvious or voluntarily assumed by individuals.

The High Court, by majority, found that the RTA did owe a duty of care to Ms Dederer. The Court reasoned that the RTA, as the owner and controller of the bridge, had knowledge of the propensity for people to dive from it and was aware of the inherent dangers associated with diving into shallow water. Despite the obviousness of the risk, the Court held that the RTA's duty extended to taking reasonable steps to prevent foreseeable harm, which in this instance included providing adequate warnings about the danger. The principles of negligence, particularly concerning the foreseeability of harm and the reasonableness of precautions, were applied.

The High Court dismissed the RTA's appeal, upholding the decision of the New South Wales Court of Appeal. Consequently, the RTA was found liable for the injuries suffered by Ms Dederer.