Only on the national highway, there are no cameras at the traffic lights in the city.

At present, there are mainly three kinds of cameras on the road, which are used for public security management at one time. These cameras are constantly shooting videos and monitoring road conditions. The other is to shoot red lights, one-way streets, illegal parking and so on. There is also a speed camera, which is radar speed measurement. When the moving object reaches the speed measuring radar area, the camera is automatically triggered, and the speed of the moving object is calculated by radar principle.