@__d @juliette I think the impact is comparable. About 50% fatal injury reduction based on this source https://worldmetrics.org/seat-belt-effectiveness-statistics/

@juliette Agreed, I see what you bring up as a strong point. On the other side, there is a lot of comments here suggesting "helmets don’t really do much". Here is a study which reports that "Head injuries were found to be reduced significantly with helmet usage by 60 percent, brain injuries by 58 percent and facial injuries were reduced by 4 percent. [...] Fatal injuries were shown to decrease significantly by a prominent 73 percent" https://www.nature.com/articles/s41598-023-35728-x Saying helmets don't work is harmful