Why are the traffic lights used in three colors, red, blue, and yellow?

These three colors are determined as an international standard

There are quite a few things that you usually don't understand, even if you usually treat or look at it.The same is true for cars.Why is the color of the signal as a simple thing that gets super?

Naturally, the color of the signal is red, yellow, and blue.For pedestrians, it flashes instead of yellow, but other colors are not used.The three colors are determined as an international standard by the International Lighting Committee (CIE), and the meaning is the same worldwide.

Then, why the three colors were selected, we don't know the exact reason for this, but the No. fifth seam in New York, which was considered the world's first signal in 1918, is already red.It was yellow and blue.It is somehow imagined that red and blue can be intuitively judged to be dangerous and safety, and the intermediate impression is naturally received for yellow.The visibility in stormy weather is also good.

The arrangement is red, yellow, and blue from the right, and red comes to the center of the road because it appeals to the danger.However, in fact, it is unknown why green is not exactly the exact reason, and there are several theories, such as because blue is easier to call than green.

In Japan, traffic arrangement by hand was performed from Taisho to the early Showa era, and in 1930, a signal made in the United States was set up in Hibiya, Tokyo for the first time in Japan.However, most people don't know how to move according to the color, so it's a laughter now that police officers were organizing by hand signals.

Six months later, domestic traffic lights were set up in Kyoto and spread all over the country.Surprisingly, 10 years later, it could be said that the evolution was surprisingly fast due to the comprehensive control of press button -type signals and multiple signals.

Even after the war, in 1963 (Showa 38), a traffic light of a sensitive type appeared, and in 1966 (Showa 41), a wide -area control using an electronic computer was implemented.In 1971, the current traffic control center started operation.

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