Why do we have red, amber and green on traffic lights and not any other colours?
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Why do we have red, amber and green on traffic lights and not any other colours?
 
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UbiquitousGeek
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Because it's simple, and most people are stupid. I would not want to drive around stupid people when traffic lights aren't simple. |
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seasoned tea
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These colours are chosen because they can be seen from afar in day and night. Red is a colour of caution and gives a warning feeling to people. Green on the other hand, has a soothing effect, signalling okay to go. When the first traffic light came about, there were only 2 colours - red and green. Amber came about as a transition between the 2 colours. It had to be a colour that is easy to differentiate between red and green. white was a first choice but there were worries that there might be confusion with the street lamps. Thus, the next colour is amber. |
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Jackie A
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primary colors? were you educated on earth? |
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happyseventeen
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red stands for danger.
amber stands for might be dangerous
green stands for safe.
i guess is a universal colors understood by many |
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Coconuts
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because they are easy to see even in dark and conditions where there is a glare they are easy to pick out. i had some one tell me that most people that are color blind can distinguish those three colors |
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Rim
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Due to wave length of light, red is the highest, we can see from far -it means stop , then yellow - it is ready to go , at last Green- it is all clear |
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Dave
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Because it is easier to see...traditionally if you see "red" you know danger.
Yellow or amber is always caution...
Green has meant go. These are the easiest to see. |
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dinosaur
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universal standard color spectrum and easiest to understand purpose of the three colors nationaly . |
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Capndon
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Red is visible from a distance & also globally accepted as a color to signify something of importance or danger.
amber is a soft color visible over shorter distances & a soft psychological jolt to wake up & start kicking.
Green is accepted as a color signifying freedom or the synonymous.
I think ;) |
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