Highway speed limits can range from an urban low of 60 km/h to a rural high of 120 km/h.
The general speed limits are regulated in terms of the National Road Traffic Act, 1989.
Metropolitan routes in South Africa numbered "Mxy" have a speed limit ranging from 60 km/h to 100 km/h, with some parts at 120 km/h It has been proposed that the national speed limit throughout South Africa should be reduced.
This would be implemented with South Africa's new road demerit system.
[6][7] The Department of Transport proposed that the baseline top speeds across the country's roads should be reduced by 20 km/h.