Traffic Signal Installation Standard

With the improvement of people's quality of life, the traffic lights on the roads can maintain the traffic order, so what are the standard requirements in the process of installing it?
1.The traffic lights and poles installed should not invade the road clearance limit.
2.In front of the traffic signal, there shall be no obstructions in the scale of 20° around the reference axis.
3.When determining the orientation of the device, it is convenient to communicate and coordinate the site decision to avoid repeated.
4.There should be no trees affecting the signal appearing or other obstructions above the lower edge of the signal light on the roadside of the first 50 meters of the device.
5.The reverse side of the traffic signal must not have colored lights, billboards, etc., which are easy to mix with the lights of the signal lights.If it is the basic orientation of the cantilevered vehicle light pole, it should be far away from the power line ditch, the well, etc., together with the street light pole, electric pole, street tree and so on.