Check weighing both axle weights and gross vehicle weights.
Thus a 10 per cent increase in axle weight would increase road damage by nearly a half.
For this reason trucks with a high axle weight are heavily taxed in most countries.
However, due to the high axle weight, the large size and the fact that they were strongly built, the Dr12s were considered to have good adhesion properties.
The reduction in axle weight, as compared to the Bulldogs, allowed for working over the Cambrian section.
The actual amount of weight each axle is carrying is the gross axle weight, or GAW.
The prototype required a special permit for service as the rear axle weight exceeded the allowed 10 tonnes.
The scales are typically connected to a single electronic controller that automatically combines the axle weights to get the gross weight.
In April it was announced that the trains were too heavy to allow standing passengers, since the trains could then exceed the permitted axle weight.
And wear rises disproportionately with the load: Double the axle weight and the damage increases eightfold.