Just to expand the explanation, blue and green were both just “ao” in Japanese until relatively recently (relatively still being a fairly long time), when “midori” started becoming more popular to refer to green.
As for why the traffic light is still called “blue” despite being green, one need only ask why there is a very popular rhyme scheme in English that goes “roses are red, violets are blue…” when violets are violet.
You’re going too fast at that point
So, how fast would you have to go to get green?
Ok never mind I looked it up. 197,640,000 km/hr
According to: https://sciencenotes.org/fast-go-make-red-light-look-green-relativistic-doppler-effect/
You would probably be out of frame by the time the speeding camera takes the picture, if it triggered at all xD
The preceding shockwave would annihilate it first anyway.
Kind of relevant xkcd what if video
Ah yeah, I remember that what if on the site way back.
Yeah, you’ve overshot and ended up in Japan.
Edit: Explanation: the Japanese word for “green light”, “aoshingou”, means “blue light” even though their lights are green too.
Just to expand the explanation, blue and green were both just “ao” in Japanese until relatively recently (relatively still being a fairly long time), when “midori” started becoming more popular to refer to green.
As for why the traffic light is still called “blue” despite being green, one need only ask why there is a very popular rhyme scheme in English that goes “roses are red, violets are blue…” when violets are violet.