The sad truth about self-driving cars
Unless you completely remove non-self-driving vehicles and other minor inconveniences like wildlife, wheather or indeed pedestrians, there will always be moral cases where a choice needs to be made between porentially crashing the autonomous vehicle (with possible consequences for it's occupants) or merrilly zipping over an unexpected obstruction -or possibly both, as a recent Tesla "incident" showed. The question is, when this situation occurs, do we want some computer to make the call, especially as it may not have been programmed with the most ethical views in mind ("Hey Steve, can you ring PR and ask them how many kids we can run over before it becomes more expensive than losing a car?").
The only way to make safe driverless vehicles would be to put them on special lanes, perhaps specifically designed to avoid sharp angles; possibly with a system to keep them on trajectory at all times, like, some manner of metal railing? We could even mitigate the risk of collisions by having a bunch of them physically attached to each other. Oh, and then we could cut costs by devoting the propulsion function to a specialized unit. I think I'm on to something there, I'd better patent the idea before the Internet steals it!