Point detail

When the axle or axle group passes from a high adhesion surface (kH) to a low adhesion surface (kL) where kH ≥ 0.5 and kH / kL ≥ 2, with a control pressure at the coupling head of 650 kPa, the directly controlled wheels shall not lock. The running speed and the instant of applying the trailer brakes is so calculated that with the anti-lock braking system full cycling on the high adhesion surface, the passage from one surface to the other being made at approximately 80 km/h and at 40 km/h.