Comment by ClumsyPilot

If they enormously different, what are you going to call South Korea, Armenia, China? I mean is anything comparable?

The real point I was trying to make is that they achieve similar outcomes, in passenger safety comfort.

And if we really do believe that legislation is so different, then is there any point of arguing about an innovation in the physical parameters of the system, after all you can only make a tram 20% lighter, but you can make the legislation 300% worse or 300% better