Originally Posted by
John Forester
Please inform us of why the mass of a vehicle determines the way in which its driver should, for example, make a left turn, or should act with regard to a traffic signal, or any other of the rules of the road. I know of no way in which mass makes that difference, either physically or by law.
Your comment is therefore irrelevant to the discussion.
Mass, speed (and for some reason you "forgot" the "speed" part),
impact.
Vulnerability, too. Remember the parable of the heavy weight champion vs. me? I may dodge and duck for a while, but once I'm hit, it's aaaaall over.
It's not bike vs. car, nor cyclist vs. driver. Drivers are protected inside their cars. Cyclists are not protected. So they're a lot more vulnerable. Cars are on an equal footing with each other, but not with cyclists. They are different, and the laws must recognize this as far as possible.
Was this really necessary?