The legislation governing digital tachograph fitting and use (1360/2002) says that the overspeed trigger point will be set to the maximum authorised speed of the speed limitation device for that class of vehicle. For most trucks the set speed of the speedlimiter will be 85 km/h, the vehicle is allowed to ‘free power’ to 90 km/h. The ‘overspeed warning’ trigger will be set to 90 km/h.
The trigger speed can only be set using a Workshop Card (calibration centre) if the overspeed trigger is set higher than the legal value, the vehicle will be issued with a a Prohibition Notice.