What does a rearward amplification of 2.0 indicate?

Rearward amplification is the tendency of each trailer to exaggerate the lateral motions of the preceding unit. It is caused by the fact that trailers are articulated and can rotate independently of the tractor. This articulation can cause the trailers to swing back and forth, especially when the vehicle is cornering or braking. Drivers can reduce the risk of rearward amplification by avoiding sudden lane changes and braking, and by taking corners slowly.