Is the traffic indicator connected in series or in parallel?
C the red light is connected in parallel with the green light after the yellow light is connected. The D green light is connected in parallel with the yellow light and then connected with the red light in series
A red light, yellow light, green light, B red light, yellow light and green light are connected in parallel
The traffic lights can change through different colors of lights, only the traffic behavior of vehicles and pedestrians can be inferred from your understanding of traffic lights
