Live data from Hacker News

Why Japan has blue traffic lights instead of green

rd.com

31–40 of 268 posts

Re: Why Japan has blue traffic lights instead of green

#31

They speak of this as if it was a Japan-only thing. The blue-green distinction is a late feature of most languages. Even Greek and Latin did not have as clear a distinction as we have today.

That's the same in Vietnamese as well, it's "xanh" for both. You have to add some extra precision if you really want to differentiate them.

Re: Why Japan has blue traffic lights instead of green

#32

Maybe Korea also had blue traffic lights in the past. But they still call green traffic lights 'blue' even though all of them use a green coloured light. I think the use of blue to mean both blue and green has also been present in Korea for a long time. I wonder where it came from? In my limited experience if Korea and Japan share something culturally it often has its common derivation in Chineese tradition.

Both come from the Chinese term 青 which in modern Chinese would by itself refer to colors anywhere between sky blue and grassy green

青天 - clear skies

青草 - green grass

清葡萄 - 청포도 - white grape

Re: Why Japan has blue traffic lights instead of green

#33
post #17

I used to wonder, as a kid, why most traffic lights in my region of Germany were red, orange-yellow and obviously turquoise. I remember drawing traffic lights (I loved drawing road layouts when I was young) without any use for the green pen. Nowadays, they all seem to be very much green, at least the new LED ones.

I’d say here in the US the LEDs skew much more blue than the incandeswnts they replace. Almost a teal.

Re: Why Japan has blue traffic lights instead of green

#35

They speak of this as if it was a Japan-only thing. The blue-green distinction is a late feature of most languages. Even Greek and Latin did not have as clear a distinction as we have today.

> They speak of this as if it was a Japan-only thing. Which other countries have blue traffic lights?

In China, for example, the word for green 綠 is used for the light

綠 is used in Japanese for the color of green tea, but they use 青 for the green light

There's also 翠 in Japanese to mean a bright green, which in Chinese also has a blue connotation (based on the color of the kingfisher who dives 淬 to catch fish)

Re: Why Japan has blue traffic lights instead of green

#36

They speak of this as if it was a Japan-only thing. The blue-green distinction is a late feature of most languages. Even Greek and Latin did not have as clear a distinction as we have today.

what's interesting is that the chinese characters used for blue and green ended up being backwards between China and Japan

Re: Why Japan has blue traffic lights instead of green

#37
post #5

Earlier quoted context omitted.

Traffic lights are still fine for colour-blind people aren't they? The order of the lights doesn't change.

Horizontal lights are not consistent across countries. The linked article has an image of a Japanese horizontal traffic light with red on the right, whereas an American traffic light would have red on the left.

And some countries don't have horizontal lights at all.

https://youtu.be/sXbHdKJ1D78

Re: Why Japan has blue traffic lights instead of green

#38

They speak of this as if it was a Japan-only thing. The blue-green distinction is a late feature of most languages. Even Greek and Latin did not have as clear a distinction as we have today.

How do you come, that they had no distinction between blue and green?

The Greek had no word for blue, which is the reason Homer described the sky with different words. But I never heard that the sky was green-isch.

While on the other side the Greek had more similarities between green and yellow.

Re: Why Japan has blue traffic lights instead of green

#39
post #35

Earlier quoted context omitted.

> They speak of this as if it was a Japan-only thing. Which other countries have blue traffic lights?

In China, for example, the word for green 綠 is used for the light 綠 is used in Japanese for the color of green tea, but they use 青 for the green light There's also 翠 in Japanese to mean a bright green, which in Chinese also has a blue connotation (based on the color of the kingfisher who dives 淬 to catch fish)

I'm not doubting that multiple languages have that aspect to it, but as far as I know that does not result in blue traffic lights. I have not heard of an instance of a blue traffic light in China to go with your Chinese example.
Post reply on HN