The Cape Metropolitan Council v Noel Raymond Graham

On 26 June 1994, the respondent was seriously injured while driving on Chapman's Peak Drive when his vehicle was struck by a landslide descending from above a rock cut. The accident occurred during a particularly wet period in the Cape winter. By 8 am on Friday 24 June 1994, 221 mm of rain had fallen since the beginning of the month, with 156 mm falling in the preceding week alone. By Monday 27 June, a further 87.4 mm of rain had fallen. The respondent had observed the "falling rocks" warning sign as he proceeded along the drive. At the time of the accident, there was a mild drizzle. The landslide struck his Volkswagen minibus, causing extensive damage and severe injuries. The appellant was a local government body and legal successor to the Western Cape Regional Services Council, which had been entrusted with the management and maintenance of the road. Chapman's Peak Drive had a history of major rockfalls and landslides, including incidents in August 1977, July 1987, March 1989, July 1993, and August 1993. On Saturday 25 June, the appellant's assistant maintenance superintendent, Mr Lamb, was called out to clear rocks that had fallen onto the road. He was called out again on Sunday 26 June morning for rockfalls on the Hout Bay side of the look-out point.

• Whether the appellant owed a legal duty to take reasonable precautions to avoid or minimise injury to users of the road
• Whether the appellant was negligent in failing to provide adequate warning to users of the road about the increased risk of rockfalls and landslides
• Whether the appellant was negligent in failing to close Chapman's Peak Drive prior to the accident given the weather conditions and increased risk of slope failures
• What standard of care applies in determining whether a local government body acted reasonably in managing a road with known risks of rockfalls and landslides

The appeal was dismissed with costs. The trial court's finding that the appellant was liable for the damages suffered by the respondent was upheld.

A local government body entrusted with management of a road owes a legal duty to users to take reasonable precautions to avoid or minimize injury, and breach of this duty constitutes both negligence and wrongfulness. When weather conditions or other circumstances increase the risk of harm to such an extent that existing warning signs no longer adequately convey the true extent of the risk to users, the authority must take additional measures, including temporary closure of the road if necessary. The test for negligence requires balancing: (a) the degree of risk; (b) the gravity of possible consequences; (c) the utility of the conduct; and (d) the burden of eliminating the risk. A local authority is negligent if it fails to establish proper systems for monitoring risk factors (such as rainfall data, weather forecasts, and historical incident records) and fails to assign appropriately qualified persons to make decisions about road closures based on those risk factors. When cumulative circumstances indicate that the risk of major slope failures causing serious harm has increased to an unreasonable level, failure to close the road constitutes negligence, regardless of public inconvenience or financial considerations.

The Court observed that most motorists would ordinarily accept the risk of rockfalls indicated by warning signs without demur and would generally be aware that the risk is intensified in wet weather. However, the Court noted that the local authority is in a far better position to assess that risk given its knowledge of particular problems, historical incidents, and access to rainfall and weather data. The Court commented that while a possible solution to eliminate danger altogether would be to construct a concrete roof over the road, the prohibitive cost and technical problems rendered this not a feasible option (and the respondent did not contend negligence for failing to adopt such a course). The Court acknowledged that deciding when to close and when to reopen a road is not easy, particularly as slope failures can occur at all times of year, but observed that difficulty in deciding when to reopen is no justification for keeping it open when circumstances require closure. The Court noted sympathetically the dilemma faced by the appellant's engineers, including that road closure is inevitably greeted by public outcry and that there is another route available involving a detour of approximately 14 km, though this is merely an inconvenience rather than a serious hardship. The Court also observed that the risk of rockfalls on Chapman's Peak Drive is not uniform and that the road presents greater risks than newer mountain passes built with modern technology.

This case is significant in South African delictual law as it establishes important principles regarding the liability of local government bodies for injuries occurring on roads under their management. It clarifies the scope of the duty of care owed by such bodies and the standard of reasonableness required in managing known risks. The judgment emphasizes that local authorities must have proper systems in place for risk assessment and decision-making, including consideration of weather data, historical incidents, and expert knowledge. It establishes that static warning signs may become inadequate when circumstances significantly increase the risk beyond what ordinary users would expect. The case demonstrates the application of the balancing test for negligence in the context of infrastructure management and shows that financial considerations and public inconvenience do not override safety obligations when risks become unreasonably high. The judgment is also notable for its recognition that authorities are not required to exercise "prophetic foresight" but must act reasonably based on information available or which should have been available to them.