I must apologies because the first reports from SA were talking of building special roads to use for S D Cars which harks back to the wiring that was used in the early S D Cars
They do apparently have to make extensive improvements to the GPS bandwidth.
I have a Garmin GPS which is a fairly good quality unit and I have had to have a few augments with "the voice" when it has wanted me to do a left turn off a freeway overpass or do a turn into a river at one stage so there will need to be improvements made
It does also raise the matter of hacking for someone to take control of your car