Division 1.4.1

The warning referred to in point 1.2.1. shall be noticeable by the driver and be provided by either of the following:

1. (a)

   at least two warning means, to be chosen between optical, acoustic and haptic;

2. (b)

   one warning means, to be chosen between haptic and acoustic, with spatial indication about the direction of unintended drift of the vehicle.