I suspect it would be more like hyoer-local traffic or even weather conditions reports. Perhaps a car might broadcast that it just had a collision or airbags w

I suspect it would be more like hyoer-local traffic or even weather conditions reports. Perhaps a car might broadcast that it just had a collision or airbags went off etc. I can't imagine autonomous hard braking etc though - perhaps these sorts of messages would just be used by cruise control systems to discretely create more space between vehicles ahead, or put up a "traffic/accident reported ahead" warning for humans to decide what to do.