Table 2.

Normalized covariance matrix for all trucks 2-axle tractor + 3-axle semitrailer based on data from the Kochanow system.

	Load 1 Axle	Load 2 Axle	Load 3 Axle	Load 4 Axle	Load 5 Axle
Gross vehicle weight	0.776	0.942	0.983	0.985	0.984