These are situations where failure is not suppose to happen when the driver is paying attention. Given that the auto-pilot is always paying attention when operational, this becomes an unacceptable failure mode because it failed in the most rudimentary way - failure to perceive stationary obstacles and a display of complete lack of situational awareness.
For emergency responders on highways, there are means to reduce the risk of additional collisions by increasing visibility to oncoming drivers (markers, lights, etc.). If the auto-pilot is not able to perceive these even when paying attention, we do have a problem.
These are situations where failure is not suppose to happen when the driver is paying attention. Given that the auto-pilot is always paying attention when operational, this becomes an unacceptable failure mode because it failed in the most rudimentary way - failure to perceive stationary obstacles and a display of complete lack of situational awareness.
For emergency responders on highways, there are means to reduce the risk of additional collisions by increasing visibility to oncoming drivers (markers, lights, etc.). If the auto-pilot is not able to perceive these even when paying attention, we do have a problem.