Limiting the maximum speed of a vehicle, and in the case of a road train, limiting the maximum speed of any of the vehicles of the road train .
Limiting the maximum speed of a vehicle, and if it is a road train, it should not take into account the limitation of the maximum speed of a towed vehicle .
Limiting the maximum speed of a vehicle, and if it is a road train, it must take into account only the limitation of the maximum speed of a towed vehicle .