I have found previous discussions around these issues somewhat contradictory. My interpretation of the discussions would be something like:
I just want a car that can drive itself. I want to be able to set it to go faster than the posted speed limit 'because everyone drives fast and its dangerous to make others have to pass you'.
The legal position must be that the speed limit is law, so you must abide by it.
So then the argument drifts off into countries having different approaches to speed limits, but some people start to give up already and say 'well if the auto driving only goes at the speed limit, I'll never use it'. Others reason that 'because autonomous cars are safer, it will be fine to raise speed limits' - presumably, following this logic we allow higher limits until we are back at an arbitrary level of deaths / injuries that we can live with.
That seems like a very human determination, unless we reach the point where we are fine abdicating responsibility for such decisions as to 'how much death is it worth so I can drive at whatever speed I want?'
That question is very problematic because ultimately the objective becomes for the machine to make 'whatever I want' possible.
We are SO far away from that happening that it isn't worth thinking about. For as long as a human has an input into the design, operation or maintenance of a machine, then ultimately there is a point of responsibility and a risk. Life itself carries risk. Insurance is just a business built around risk, which nowadays has to be a measurable, statistically predictable risk for mass markets. It is also established that there are limits to the insurance carriers obligations, often dictated by points at which blame can be placed elsewhere.
We already have safe, predictable transport (in theory at least) with public transport, but it is usually inconvenient to a greater or lesser extent. This debate seems to come down to bringing personal mobility closer to being public transport.
Trouble is, many of us appear to be not so good at sharing or accepting compromise. It's funny that in considering how a machine can completely take over from a human, it ends up being about 'having whatever you want without compromise' which isn't how nature works!
I actually enjoy taking responsibility for things I have control over. That is where I feel I have some freedom. I want my car to have driver controls and retain the right to use them how I deem safe.