@Niall@mastodon.nz The rough approximation for the increase in damage is the fourth power. So if the axle is carrying twice the load it's causing 2x2x2x2 as much damage. I get that that's oversimplified and our roading construction is different from where that work was done (I've heard they had to call off a similar trial on a test road constructed here because it got too dangerous. The road was degrading even quicker, so whatevs) and I know there's new developments in axle engineering that help. But the exponential approximation actually comes from the physics of how mass and energy relate, so I'm sceptical @Iveyline@mastodon.nz @pezmico@mastodon.nz