handy wrote:
I haven't said - anywhere - that kinetic energy was the only one to consider, except as in this hypothetical comparison where ALL OTHER THINGS (such as the potential likelihood of a collision - a deduction based on safespeeds claims) REMAIN EQUAL.
I have never denied that in the real world all other things are not equal.
I even agree - mostly - with the safety elements of the messages here, and that policy is generally overweighted towards a single issue.
But, as you say, things don't remain equal in real-life, and other factors compound things even more.
Which is why narrowly controlling one
physical factor, like speed, has little or no effect - the hypothetical effect of controlling that single factor is completely swamped by variations in the myriad of other factors, which are mostly random and beyond the drivers control.