Isolated cyclepaths is the answer. This will (mostly) prevent cyclists to be hit by cars and smashing their heads on curbs.

You do understand that people can fall off their bike without cars hitting them, right?

Yes, and as i mentioned, generally speaking that will not kill you if you wont go too fast. Like with an omafiets, you don't go that fast.

I mean, we can go back and forth here all you want. You can look up the data yourself or visit the Netherlands and look around ...