From the hot discussion of the new version of the traffic light: the world's first traffic light has killed the police

According to media reports, recently, various cities have gradually implemented the new version of traffic lights. The "new version of the red and green lights" has also become a hot topic.

In fact, the history of traffic signal lights can be traced back to more than 150 years ago, and earlier than the popularity of motor vehicles. In 1868, the world's first traffic light in London became a landmark for people to check in, but the subsequent accidents also caused a police officer to die.

Today, let's take a look at those things in the history of traffic lights.

New version of traffic light

In the 19th century, the British Industrial Revolution was completed, Britain became the most developed country in the world, and London's population increased rapidly. Although the road was mainly carriage on the road, traffic issues began to appear.

In October 1859, a British spinning worker came up with a way to control traffic with light colors. Unfortunately, this invention did not attract the attention of the government. After a few years, because a carriage crashing accident often occurs on the cross road at the British Parliament, people feel that it is necessary to set up a traffic signal light.

The world's first traffic signal lamp appeared on December 10, 1868. This red and green gas lamp designed by the British mechanical division Hart, which appeared at the crossroads in front of the parliamentary building. Essence A policeman holding a long rod to affect the belt to convert red and green: red lights stop, green lights.

Why choose two colors of red and green? There are two types of explanations: the first is that the married women in the UK at that time were more red, and the unmarried people were in green to distinguish it. The inspiration of the traffic lights came from this. The second explanation is more scientific, because in the visible light, the red wavelength is the longest, and the longest penetration distance is penetrated in a fog or dusty environment. Red is the most suitable as a warning signal light. At that time, the railway traffic had been used in large areas.

This signal light not only greatly reduced the traffic accidents at the Parliament building, but also attracted a lot of people in London citizens, as well as officials from officials in New York, Paris, and Berlin. Some people specifically rented carriages to pick up visitors and earned a lot of benefits. The hawkers also made business around here. The scene was very lively.

Unfortunately, this traffic gas lamp was only killed for 23 days after the explosion accident, and a policeman was killed in the accident.

The British gas signal lights are flowing in a flash, but with the popularity of electric lights, traffic signal lights ushered in new development. In 1914, for the first time in the streets of Criflan, the United States, a traffic signal light with electricity as an energy source was still controlled by manual control. In 1917, the U.S. Salt Lake City took the lead in using a linkage signal control system. The system can be controlled uniformly ... In the 1950s, the computer was applied to the traffic signal light system, realizing the intelligent management we saw today.

The earliest road traffic light in China appeared in Shanghai British Concession in 1928. At the beginning of the birth of the traffic signal light, there were only red and green colors. Some Chinese materials recorded that the yellow lamp was invented by the Chinese Hu Ruding.

Hu Ruding was born in 1905. He studied in the early years of Cornell University and Massachusetts Institute of Technology in the United States. When serving as a staff member in the United States, the danger of the traffic lights brought the road instantly to pedestrians, and the idea of ​​the red and green light plus a transitional yellow signal light was adopted, and it was adopted.

However, this statement is also controversial. According to reports, as early as 1920, the US police William Pots used a value of $ 37 and control boards to produce the world's first group of red, green, yellow three -color traffic signal lights. And put into use in the United States. Due to the lack of awareness of intellectual property at that time, the invention did not apply for a patent.

The safety and convenience of traffic signal lights to modern transportation is self -evident, but in some places, people are more inclined to cancel signal lights and want to rely on human morality and security consciousness to maintain road order.

In 2006, as a pilot, 7 cities and regions in the Netherlands, Denmark, Germany, the United Kingdom, Belgium and other countries tried to cancel all the traffic lights and signs on the street, allowing drivers and pedestrians to maintain traffic order through self -constraints. The drivers did not rely on traffic lights. They only drove slowly. Pay attention to pedestrians on both sides. The speed became slower, but the traffic was even better than before. (Zong He)

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