In europe apparently 50% of brain injury is caused by motor vehicle crashes.
That's pretty sound evidence for extra secure roll cages, motorsport helmets, five point belts, cup seats, neck bracing collars, nomex suits and lowering driving speeds all around.
Is this ever going to happen? Absolutely not. Why not? Because it would inconvenience the car driver. But you are allowed to inconvenience the cyclist, since that's for their own good, and think of the children and of course they aren't really people. They are cyclists.