The system is based on a sound signal to be placed in the immediate vicinity of the lorry’s existing flashing light.
As soon as the lorry is moving below a particular speed and the right-hand indicator is switched on the signal unit mounted on the lorry will produce a short
At the same time, the side-marker lights will flash.
In this way, the lorry will make clear to the road-users across its whole length that it intends to change direction.
The driver, too, hears the sound signal and is thus made aware in time of the possible danger of turning.