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There's real data out there that while a helmet has better survival rates than not; but cars give more room to bicycles without helmets, so the incident rate is lower.


Appearing like a woman buys you even more space than riding without a helmet

https://www.eta.co.uk/2011/04/01/safest-bicycle-helmet-has-b...

https://pubmed.ncbi.nlm.nih.gov/17064655/


The only data I’ve seen on that is one guy who self-sampled and self-reported. I’d be happy to see more.


Appears he did self sample, but reporting was quantitative with a ultrasonic sensor.

In the UK.

https://drianwalker.com/overtaking/

https://www.scientificamerican.com/article/strange-but-true-...


Where’s that data?


It's in the UK, using ultrasonic sensors. Dr. Ian Walker has provided follow-up as well

https://drianwalker.com/overtaking/




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