The monitoring of running a red light is public. You can see if there is any red light monitoring at the intersection. The appearance of the monitoring of running a red light is roughly as follows. Because of the objective need of shooting, it is necessary to shoot the color signal lights of vehicles before and after the stop line and when crossing the stop line at the same time, so it is installed in the sky a few meters behind the stop line at the intersection. The direction of the monitoring head is roughly opposite to the stop line, and each corresponding lane has a monitoring head.