Why are there three colors of led street lights

Cars and pedestrians cross traffic lights, commonly known as ( Traffic lights) The phenomenon of more and more get the attention of the society, from kindergarten began, we knew that; Red light stop, green line; The traffic rules, you know why traffic lights have one; Red yellow green; These three colors?

the phenomenon of cars and pedestrians running red lights, commonly known as the traffic light, has aroused the concern of the society more and more. We can know from kindergarten. Stopped for a red light, green light. Traffic rules, then you know why the traffic lights; Red, yellow and green; This is 3 kinds of color? This should be from: traffic lights; The invention of the start.

it is generally accepted that the world's first traffic lights appear in the UK. On December 10th, 1868, mead, a British mechanical professional moralists; Hart was designed and made a traffic signal lamp, gas lamp 7 meters high, with a light green and red lanterns hanging. At the foot of the lamp and one with a long pole police pulling belt, according to his intend to change the color of the lanterns. Why is red and green? This is associated with the British culture and was wearing. Red dress, 40% of women say they have been married and wear good clothes. Green dress; These women say they are unmarried, so rhett said. Don't get close to; Green said; Can be close to; 。 In fact, the red light and green light has a strong penetrating power, not easy to spread. In addition, as the opposite color, they are easy to identify, also very suitable for as a traffic light. However, initially only red and green lights, and yellow lights just appear late in the United States. After the first world war, the rapid rise of the United States. On the streets of vehicles more and more, the speed of the car began to accelerate. Harder to stop at a red light. As a result, some street lamp manufacturers think of in the middle of the traffic lights and a yellow light, said: be careful; 。 Many Chinese materials mentioned is the inventor of the yellow light Hu Reding, a Chinese when working in the general electric company. However, there are other records show that the world's first red, yellow, green, three colors and four to the traffic light is put into use in October 1920. So far, no matter who is the earliest inventors, and convenient traffic lights brought social order. Of course, on the premise of you and I must obey the traffic rules, obey the traffic rules is the duty of every citizen to our society. This is also our responsibility for family. For the sake of our family, please obey the traffic rules. Traffic lights manufacturers siao traffic equipment co. , LTD. Announced!