Drivers of special vehicles that are required to use the V-2 signal — when must they use it?

The activation of this V-2 signal must be independent of the other lights and must function both day and night when travelling on public roads. This light indicates the position of a vehicle performing a service, activity or work, whether stopped, parked, or travelling at a speed not exceeding 40 km/h. It will also be used by vehicles under special transport arrangements, pilot or escort vehicles, and military convoys. In the event of a failure of this V-2 light signal, they must use the dipped headlight together with the hazard warning signal.