Do you know? In fact, traffic lights predate the invention of the automobile 18 years ago, which is not breathtaking, especially surprising.
The first car was invented in 1886, but the first traffic light appeared in 1868, which is not particularly magical, like a match and a lighter.
In 1886 and before, horse-drawn carriages often hit people in London Square, England, and accidents were often very serious, and people had a very difficult time getting around. Therefore, the London government tried to make some changes to traffic accidents, so it came up with the idea of using lights to make traffic rules, but the color did not know what color to use instead.
However, at this time, two colors were very popular in Britain, one was a red conservative women's clothing, and the other was a green elegant women's clothing. Red is worn by married women, while green is worn by unmarried women, and thinking of this, the British government adopted these two colors to make traffic lights, and the effect was so remarkable that traffic lights were passed down.