Design specifications of road traffic signals:

1. The design of road traffic signals must conform to the requirements of "road traffic light setting and installation specification" and "urban road traffic planning and design specification".

2, road traffic signal design, want to combine road intersection layout (such as intersection, tee junction, y-shaped junction and dislocation intersections, etc.), traffic flow, traffic accidents and other conditions.

3, design code of road traffic signal lamp, road traffic signals shall be dedicated power supply circuit design, outer ring road in the city level crossing, the best configuration is special transformer, day and night in order to ensure safe and reliable power supply.

4, road traffic signals shall be synchronization with road design, implementation, as far as possible to avoid repeated construction of power supply and distribution system, reduce the part of the journey, the excavation work, and can prevent the traffic accident caused by the traffic signal facilities lag, has obvious social and economic benefits.

5, the broad road, can be divided into four lanes, will be one of the three lanes for traffic lanes, each side chooses three sets of LED auto lights (each group includes a red light, yellow light, green light), respectively, according to turn left, go straight, turn right, choose long arm bracket (12 m to 14 m) basic are in place to ensure that each set of signals to the appropriate lane. For a relatively narrow road, it can be divided into four lanes, with two lanes for traffic lanes, and two LED traffic lights on each side, control left and right turn respectively. For narrow lanes, a group of LED traffic lights can be mounted on each side to indicate whether the vehicle is passing or stopping.