It's not the first some time some one has thought this. Probably, one of earlier studies regarding that point: http://www.drianwalker.com/overtaking/overtakingp

It's not the first some time some one has thought this. Probably, one of earlier studies regarding that point: http://www.drianwalker.com/overtaking/overtakingprobrief.pdf http://www.drianwalker.com/overtaking/overtakingprobrief.pdf I think it would be interesting if conducted with multiple riders, and different areas. Combine this with the fact there are studies showing increase car and bicycle crashes with helmet wearers. It definitely plausible. There is also an other study I remember seeing that noticed helmet wearers took more risks. So there could be more variables at play. http://journals.sagepub.com/doi/10.1177/0956797615620784 http://journals.sagepub.com/doi/10.1177/0956797615620784