A road authority that constructs or reconstructs a road creating a section safely negotiable only at restricted speeds is under a duty to warn the motoring public of the advisory speed by appropriate signage. Failure to do so constitutes misfeasance, not nonfeasance, because the authority has caused the danger by its execution of road works. Where a significant hazard created by the authority forms part of a complex of factors producing an accident, a just and reasonable application of causation principles requires that factor to be regarded as a contributing cause, even if it cannot be shown to have caused the initial loss of control.
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