What colour light is displayed to oncoming traffic when both the green circle and the green filter light are on?

When both the green circle and the green filter light are illuminated, the light displayed to oncoming traffic is red. This signaling indicates that despite the green aspect being visible for vehicles in a different direction, oncoming traffic must stop. The presence of the green filter light typically provides a specific instruction or priority for particular movements, such as turning, but it does not override the basic traffic controls represented by the red signal.

Red is widely recognized as the universal signal for vehicles to halt, ensuring safety by preventing conflicts between opposing traffic flows. The illumination of this light reinforces the importance of adhering to traffic signals, ensuring that all road users understand their obligations in different scenarios.