This is why I say that self-driving cars will never work until humans are removed from the equation. Hell, even then there will be crashes caused by sensors going bad, mechanical failure, etc. etc.
Las Vegas' self-driving shuttle service marked its return by getting into a minor collision, according to local NBC station KSNV News 3. French startup Navya's autonomous electric vehicle shuffles at around 15 MPH on a 0.6 mile circuit in the downtown Fremont East district. But, just an hour into its year-long trial (which follows a successful stint in January) the shuttle was hit by a delivery truck that was backing up.