What is the order of the traffic lights from left to right at the intersection?
The nearest to the road is the red light. The green light is by the side of the road. The yellow light is in the middle.
If it is horizontal, no matter whether it is on the left or right of the road.
The top must be the red light, the yellow light and the green light
This setting is designed to allow people to see the red light first, which is not easily obscured
