From the history of the development of talk about the origin of much money much light

In England in the early 19th century, the central city, there are three kinds of traffic light colors represent different separation, the significance of red, green, on behalf of women of different separation conditions. At the same time, women wear red that I have been married, and unmarried women wear. Later, the English often sudden

in the early 19th century, in central England city, there are three different colours, red and green represent different women separation condition. At the same time, a woman who is wearing red clothes said I'm married, and unmarried women wear. After that, the British used frequently in the carriage rolled in front of the parliament building in London, so everyone is green and red. On December 10th, 1868, members of the tribal council's highest of light was born in London. Then mechanical moral street square in the UK, plans to build a 7 meters high light, hanging in a light red and green traffic lights, lanterns and gas is this city street lamp at the top of the lamp. At the foot of a lamp, with a long pole sent someone to touch with light color. According to the gas chimney, the front of the lamp has two pieces of red and green glass, rather than a shadow. Unexpected as long as 23 days of gas explosion destroyed themselves, Russia sent people on duty, ruin the day. The inventor of the yellow light is China's President hu jintao, he was very rude, but he isn't. Science; Association hopes to study in the United States, the great inventor Thomas mead; Edison, chairman of general electric company is an employee of the United States. One day, he stood at a busy intersection waiting for green light signal. When he saw the red light, he was about to pass by, hear the sound of the car after, gave him a big jump. Back to the dormitory, he thought it over and over again, finally think of danger in the center of the red and green light and yellow light, suggest you consult. He must be attention immediately. Red, yellow and green colors light clan have a perfect command signal, a wide range of empty land, sea and air transport to all over the world. In 1928, the first traffic light appeared in the British concession in Shanghai. Since then, the city's traffic lights were abandoned. It was not until 1914 that Cleveland LanCai back to the first traffic light. However, this time. The light; 。 In cities like New York and Chicago, the lights started from the beginning. With the development of various vehicles and traffic demand, the real trichromatic lamp ( Red, yellow and green symbol) Born in 1918. Installed on fifth avenue in New York since the beginning of the three color wheel projector, greatly improve the city traffic. Starting in the 1950 s, when the earliest hand-held electric control is implemented, the signal light on the traffic lights constantly updated, in the form of scientific and automation from computer controlled to modern electronic monitoring. 。