Strong disagree that this is all non-issue/obvious. There are plenty of cases where it's better to not communicate rather than try and communicate in a way tha

Strong disagree that this is all non-issue/obvious. There are plenty of cases where it's better to not communicate rather than try and communicate in a way that is likely to be misinterpreted. Regarding your "just make the LEDs dimmable", this just adds more opportunities for confusion; humans will have no idea how the distance-brightness relationship is calibrated, it will appear different depending on the lighting conditions, etc. Just like consider how many gauges you have ever seen that communicate a continuous variable based on the brightness of the display. (Very few or none). No one is throwing up their hands. Human-autonomous-vehicle communication is a whole research field. Waymo has every incentive here to both make the vehicles safer and to make pedestrians feel safer (holding actual safety fixed). The ultimate test is not your first gut reaction as to whether they have done "enough", but rather it's whether the vehicles are safer than human-driven ones, and the evidence so far strongly points to that being the case.