Indeed! Positional is critcal and useful.
D
On 5/12/22 2:07 PM, Gregg Eshelman via Emc-users wrote:
Go traffic lights in Japan used to be blue. There may still be some blue ones
in out of the way places. When the country adopted the international color
standard for traffic light colors, supposedly their department in charge of
such things chose the bluest shade of green they could get by with.
The plain old traffic light can be a bother for people who are red-green color
blind. They have to note the position of the light rather than the color. Might
be more of an issue with horizontally positioned ones, especially when at a big
intersection with multiple lanes and lights.
What you don't want to do is drive with red sunglasses that are the perfect
shade to 100% block the color of stop lights. Can't tell they're on at all so
you have to know that when you see no lights, the red one is on.
On Thursday, May 12, 2022, 08:21:29 AM MDT, Chris Albertson
<albertson.ch...@gmail.com> wrote:
On Wed, May 11, 2022 at 3:03 PM gene heskett <ghesk...@shentel.net> wrote:
I suppose in some circles that bleached red could be called brown. But
blue has never been ground on this side of the pond. Which is odd, in
electrical wireing, black is hot, white is neutral/ground, a static
ground is green. Inside a radio, black is ground.
Yes, that is how it works in the US. But they did other things
differently in the US too. Like using inches and yards to measure
distance. At about 60+ I might be the youngest to remember US units like
feet used in engineering work. When I was in school they still had us do a
few of the problems in US units. They stopped using that soon after and
from the 80s all work was metric.
There might be a cultural reason for using blue for ground. My wife
sometimes slips up and in English calls the "GO" light in a traffic signal
"Blue" even though the color is green worldwide. Her first two
languages, when she grew up were Japanese and Chinese.
In English Green, Ground and Go all start with "G", so I'd guess that is
why we used green. But that coincidence only works in English.
Chris Albertson
Redondo Beach, California
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