This reminds me of when I was driving in rural Texas a few months back and came across an apparently very recent accident involving a jack-knifed truck. The firefighters had just arrived on scene. While slowly and carefully driving around the accident, a firefighter got out seemed quite upset with me and seemed to be yelling something at me as loudly as he could, but I couldn't make out a word. I still have no idea if I did something wrong. Driving is 99.9% routine and boring and that .1% is ambiguous and quite potentially life threatening. I share the skepticism of self driving cars.
I had someone go in front of me while circling his flashlight as if to proceed. When I did, he casually walked in front of me. He wasn't actually paying attention and was just flinging his light for directing traffic without thinking about it.
Yeah, the .1% can be really ambiguous and dangerous.
Cars are made to be completely quiet inside them, which means there is limited way to communicate with those inside and also that horns are obnoxiously loud.
