Are you saying that if you were behind the wheel in a self-driving car and it ran a red light, you wouldn't be the first one to sue the auto maker (assuming you survived)? I don't see any way that the auto-maker wins in a court case in that scenario, unless there are laws that explicitly say you have to drive the car and the manufacturer has no-fault protection. If the latter is the case, then what's the point? Am I going to let the machine do the work if I'm solely responsible for when it screws up?
I imagine a traffic utopia where cars drive themselves, no one causes accidents or jams during merging and everyone goes a safe speed during inclement weather. I'm just not sure how we get there with our current legal system. Even if these things are as safe as humanly possible, there will still be some type of failure or accident.