“(3) There is a requirement that at the geographical point where the motorist exceeds the speed limit the requisite signs could reasonably be expected to have conveyed the limit to an approaching motorist in sufficient time for the motorist to reduce from a previous speed to a speed within the new limit.”
“[Where no such system of street or carriageway lighting as is mentioned in section 82(1) is provided on a road], but a limit of speed is to be observed on the road, a person shall not be convicted of driving a motor vehicle on the road at a speed exceeding the limit unless the limit is indicated by means of such traffic signs as are mentioned in subsection is mentioned in section 82(1) is provided on a road], but a limit of speed is to be observed on the road, a person shall not be convicted of driving a motor vehicle on the road at a speed exceeding the limit unless the limit is indicated by means of such traffic signs as are mentioned in subsection (1) or subsection (2) above.”