At present, there are more or less the use of the wrong traffic lights lamps and lanterns, damage the seriousness of the traffic signal.

The composition of the signal lamp is not standardized, the use of composite light. "Road traffic signal lights" (GB14887-2003) regulations, motor vehicle signal lights each set by the red, yellow, green three geometric location of the discrete unit. The same direction of red, yellow and green three color direction indicator lights should be for three geometric location discrete unit in the use of composite traffic signal lamp, color blindness, or other special slow traffic participants cannot by geometry resolution color light signal and determines whether can pass, once an error of judgment can easily lead to accidents.

LED traffic signal lamp shape is not correct.

Traffic signal lights, traffic signs, traffic line markings shall comply with the road traffic safety and smooth flow of requirements and national standards, and remain clear, eye-catching, accurate and in good condition. In does not meet the national standard and the rule of law, the signal lamp does not have the proper legal effect, once an accident occurs, it is difficult to determine the legal responsibility, to the traffic police's law enforcement work brings hidden trouble. At the same time, special shaped lamp is not conducive to the normal identification and judgment of the field traffic participants, increase the burden of operation, and even affect the efficiency of traffic.

No signal lamp set.

At present, there are still some cities did not set the conditions set LED traffic lights. One has to set up traffic lights intersection, road traffic lights is not set, a large number of traffic flow disorder through the intersection, road will cause the traffic conflict, causing traffic jams on the roads, and even lead to traffic accidents. Second, did not achieve the set intersection traffic signal lamp conditions, set up road the traffic lights, the intersection, road traffic stream due to less, excessive security but also causes the traffic efficiency reduce, also easy to increase the red light running, bring traffic safety hidden danger.