Although I agree with this post in that I wear a helmet for the same reason, the data here are from the Netherlands, which famously has many cyclists and lots of segregation. For the UK, the figure is >4x as likely to be killed by a motor vehicle. www.gov.uk/government/s...
Reported road casualties in Great Britain: pedal cycle factsheet, 2024
gov.uk
The fraction of fatal crashes while crashing alone and while a motor vehicle is involved is roughly similar. But, the number of crashes alone that end up in emergency services and hospitalization is much greater than crashes with cars. I will keep using my helmet 😃