On Mon, 25 Feb 2019 18:00:57 +0000
RJH wrote:

On 25/02/2019 17:16, Rob Morley wrote:

Risk compensation by drivers. It's been measured by at least one
proper study. Obviously there's still the element of a driver
misjudging speed and/or distance badly enough to hit you, but the
reduction in error margin is real.


OK, thanks - is that the heart rate variability study of 2011? it's
the only one I can find - "helmet users reported higher experienced
risk and cycled slower when they did not wear their helmet"?

Well no, because that would be risk compensation by cyclists not
drivers, and it has nothing to do with measuring passing distances.