The Sunday Times Metro section has an article on the proposed PWV9 highway between Pretoria and Johannesburg. According to the somewhat breathless piece, the route has been revised to run further west than originally planned, between Sandton and Hartebeespoort, rather than parallel to the Ben Schoeman Highway.
I don't have enough information about the route to make a definite comment, but I do hope that this new highway doesn't become a road for the elites to zip between their golf estates and workplaces, leaving the poorer western parts of Pretoria and Centurion without a good transport link to the province's economic hub.
