Blue Traffic Light: Seeing a blue colored traffic light can really surprise anyone, but there is a place in the world where you can see this sight if you go there

Blue Traffic Light:  Seeing a blue-colored traffic light can surprise anyone, but there is a place in the world where you can see this sight if you go there. 

Blue Traffic Light:  Blue traffic lights are a rare sight, but they are used in some special places. Usually, traffic lights use red, yellow, and green lights, but blue traffic lights can also be seen in some places in Japan.

why is it used 

Japan has historically referred to the "go" signal as the Japanese blue traffic light for language and cultural reasons. This is because the Japanese word "ao" refers to both the colors blue and green.

what is history 

When traffic lights were first installed in Japan in the 1930s, the Japanese described the 'go' signal as "ao", which covered both blue and green. The Vienna Convention on Road Signs and Signals in the late 1960s aimed to standardize traffic signals (including green traffic lights) internationally. Japan, which did not sign the convention, continued to use the term "ao" for the 'go' signal. 

Under international pressure to deal with this linguistic and cultural challenge, the Japanese government came up with a compromise. A 1973 cabinet order directed traffic lights to use the bluest shade of green, leading some to call it a "serious" light. Today, as you travel in Japan, you'll encounter a variety of Japanese traffic lights, from the standard green to the distinctive blue "go" signal.