Specific speed limits that are not in line with the general speed limit for any particular road, is set by the municipality. The municipality will take various factors into account, like the road conditions and amount of pedestrian activity within the area.
The National Road Traffic Act, specifically regulation 292, governs the general speed limits applicable to certain types of road. These are:
These are the general speed limits that are applicable. However, where you see a road traffic sign indicating the minimum and maximum speed limit, you need to adhere to the set limit as road traffic signs take precedence over the general speed limit set.