Do you have an obligation to stop the tram on the line marked by triangles, if another vehicle was to approach the transverse road?

The visible vertical sign A-7 "Give way" requires the driver to give way to vehicles on the intersecting road. It is supplemented by the P-13 road marking, a line composed of triangles, which designates the location for a conditional stop. In the situation described in the question, i.e. when a vehicle with right of way is approaching, it is mandatory for the tram to stop at this line in order to give way safely.