The worlds first traffic light was born in the UK in 1918!

The world's first traffic light was born in the UK in 1918!

At the beginning of the 19th century, in York City in central England, red and green clothes represented different identities of women. Among them, the woman in red dress said that I was married, while the woman in green dress was unmarried. Later, the carriage accident occurred in front of the London Parliament Building, and people were inspired by the red and green. On December 10, 1868, the first member of the signal light family was born in the square of the London Parliament Building. Designed and manufactured by the British mechanic De Hart at that time, the lamppost was 7 meters high, and there was a red and green lantern on the body - the gas traffic signal, which was the first signal light on the city street. At the foot of the lamp, a policeman with a long pole can pull the belt to change the color of the lantern as he pleases. Later, a gas lampshade was installed in the center of the signal light, and two red and green glass were alternately blocked in front of it. Unfortunately, only 23 days of gas lamps suddenly exploded, causing a police officer on duty to ruin the sex.

Since then, the city's traffic lights have been banned. It was not until 1914 that Cleveland in the United States took the lead in recovering traffic lights, but it was already an "electrical signal light."

The first three-color lamp (red, yellow, and green) was born in 1918. It is a three-color circular four-sided projector that is installed on a tower in Fifth Street, New York City.

The inventor of the yellow signal light is Hu Yuding of China. He went to the United States with the ambition of "scientific saving the country" and worked as a staff member at the General Electric Company of the great inventor Edison. One day, he stood at the bustling crossroads waiting for the green light signal. When he saw the red light and was about to pass, a turning car screamed and passed away, scaring him into a cold sweat. Back in the dormitory, he repeatedly pondered, finally thought of adding a yellow signal light in the middle of the red and green lights to remind people to pay attention to danger. His suggestion was immediately confirmed by the relevant parties. Therefore, the red, yellow and green signal lights are a complete family of command signals, covering the land, sea and air transportation fields all over the world.