Is LIDAR not susceptible to this? I guess it might be more robust against random hiccoughs (though I have no basis for this whatsoever), but is it also protected against malice?
Still I wonder if it has failure modes that humans lack, which could result in situations where it does inexplicable things.
Almost certainly :)
This isn't a perception issue. It's an insufficient model for the world, and the software is obviously biased towards obeying critical traffic controls at lower confidence levels. It would be interesting to see what would happen if a (higher) speed limit sign was flashed in the same way.