Or drive at whatever speed and still not pay fines. Aarto fines are like etoll statements. It is simply the government wasting taxpayers money on useless pieces of paper.
You only need to pay the fine if the trafic cop actually stop you and hands you the hand written fine that includes a summons, and even then I suggest waiting for the warrant of arrest, many times in the past the good traffic officers that has stopped me has either forgotten to hand in their paperwork and the fine never got onto the system and from time to time they write off outstanding fines. I can't even remember when last I really had to pay one.
The avarerge speed nonsense and all the illegal camera directly after the speed change on the hiway to Durban is even more ridiculous. 140-160 all the way and smile and wave for the photo.