These are split second decisions and people wheel out philosophical problems?
In the vehicle, is it still the fault of the driver, or the software company? Or insurance?
Is someone driving into you? Not much physically you can do to avoid it no matter who/what is driving.
Semi-autonomous cars can easily be blamed on the driver, because they're still in charge of the car, just being assisted, not commanded.
Is the car taking unlawful actions on it's own? Should propably fix that on the maker side. Why should any company be exempt when their product is not up to spec? The price increase to make it compliant is necessary, not a nice to have.
And with the trolley problem, you often can't compute philosophical questions with pure logic because of their fractal nature, but you can make it a legal argument. Does the car have the right to kill? If it doesen't, it can't and won't choose. It will be an accident just like any other would be.
Never mind what a person could do; the AI car will have a different expectation. And remember, there's the chance of suing Google when your mailbox is run over. Not just some schmuck.
-I, robot
Our roads aren't built so you can 'not exceed...stopping distance'. Sure in good conditions with dry road and clear shoulders and a wide ditch, you can come up with a figure. But that's not where accidents happen. They happen in town, at intersections, driveways.
Every AI car already has to make the 'trolley car' decision, and you can bet the programmer put something in there. If something is in the road, does it dodge around? Yes or no. That's the gist of it.
The good news is, when an issue is found then all the cars can be updated. The bad news is, conflicting decisions about right behavior. The trolley car problem springs to mind - can an AI car leave the road to avoid a collision? What if somebody is on the shoulder and could be hit? Which accident should the AI choose?
Different municipalities/states/judges will have different ideas. It'll be a madhouse until some groundrules are in place e.g. "An AI car shall not leave the road". Call it the 'Laws of automotive Robotics'.