I get rear ended about twice a year in LA traffic by 4500 lb SUVs going 40-50 mph. I've learned to adjust the headrest on my seat properly so my head only jerks

I get rear ended about twice a year in LA traffic by 4500 lb SUVs going 40-50 mph. I've learned to adjust the headrest on my seat properly so my head only jerks back an inch or two and I don't get whiplash anymore. I think collisions below 40 mph are quite survivable if they're not two-way head on/overlap and the cars are below a certain weight and designed to bounce against each other. They just need to make every autonomous car on the road 1500-2000lb and install rubber bumpers. The neural net will figure it out itself after a few million real world collisions and daily commutes will gradually become less jarring and eventful.