Driverless cars outside of highly controlled roads, such as modern motorways, will be a long time in coming to NZ. At the moment its just a futurists wet dream.
There are so many drawbacks, such as not being able to work in the rain, see black cars or cyclists. On our roads its going to be a long time before they can operate because of minimal road markings.
The existing fleet is not going away any time soon, there will still be decades of ordinary cars out there, its like the other pipe dream of us all in electric cars.
Imagine driverless trucks on the existing picton to chch run. not a chance. If they do run soon, it will be on things like waikato expressway, controlled motorways easily monitored with regulated and defined road markings.
I think we are suckered in by the promise and not aware of the reality of them at present.