This traffic light is used to regulate the traffic of
Trams and trolleybuses.
Only trams.
The traffic of trams, as well as other public vehicles traveling in separate lanes.✓الإجابة الصحيحة
الشرح
The four white-lunar signals govern trams and can also govern route vehicles using a lane reserved for them. Treating the device as tram-only is too narrow, while applying it to trolleybuses regardless of lane ignores the dedicated-lane condition.
