In Gauteng the tolling will apply to much of the huge existing freeway mileage in the province.
It's also a nationwide issue. The planning for the new N2 freeway though the Wild Coast area of the Eastern Cape would be part funded by a new toll plaza on the N2 in Durban's southern suburbs...
The local government in Durban are resisting this strongly, and it is the same in the Western Cape where SANRAL wants to toll the N1 and N2 north/east of the R300.
On the other hand, I think the N2 does badly need upgrading between East London and Port Shepstone. In that part of the country the coastal plain disappears and rugged terrain stretches right down to the coast (that's why it is known as the Wild Coast) and so the N2 is deflected up to 100km inland on quite a detour and becomes quite winding. It is 350 km between East London and Port Shepstone as the crow flies but 540 km by road.
I wonder what the economic impact of tolling is. My feeling is that tolling is politically easier, but doesn't provide as much stimulation to the economy as roads that are free to use paid out of general taxation, because a person or company will use a free road more as they have already paid for it.East London to Port Shepstone - Google Maps
Back to the GFIP and there are some nice before-after comparisons where new and old satellite views are stitched together: Western Bypass - Google Maps