There is a Blue Traffic Light here, know what it means!

Blue Traffic Light:  Why are Traffic Lights Blue in Japan: If you have seen the traffic light setup in India, then it has only three colors. These include red, yellow, and green. However, have you ever seen a traffic light in which blue color has been used instead of green? In most countries of the world, like India, only green, yellow, and red colored traffic lights are used, but do you know that in Japan, blue light is used for Go and not green? 

Why does Japan have blue traffic lights?

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.

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 of 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.