[FireBeyond]

It's stupid to come to a gradual slowdown with hazard lights, but it's not stupid to keep blazing away at speed, with an obviously inattentive (or perhaps completely disabled) driver? I'm confused - even you acknowledge it has that fallback, but it's 'stupid' to enact it after a couple of failed warnings? When should that threshold be crossed, then?

[kirkbauer]

That is exactly what it does; apparently the accident happened before it could complete its "slow down and stop with the hazard lights on" process.