Road numbering
If you need more information about the various routes (R's), metropolitan routes (M's) and National Roads (N's) in South Africa, check out this useful link. I will update this blog with more sites on this topic as I stumble on them.
I expect that some streets that will have their names purged soon (major roads in many places are named after the likes of DF Malan, and Hendrik Verwoerd), and knowing road numbers will make navigation easier.
Unfortunately, I doubt that the authorities will learn their lesson, and choose politically neutral names, so I can expect my hypothetical grandchildren to go through another round of street renamings in around 80 years.