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I recall an anecdote where some
American town with a large Irish population flipped its traffic lights, so that green was on top, but this had to be undone because the orientation of the lights must be consistent for colorblind people. But if this were the only way for them to distinguish the lights,
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How about a mention of the fact that the most common form of colorblindness (1 in 14 males) can't distinguish between red, yellow, and green? I once read that green lights are blueish-green in order to be distinguishable for those with red-green colorblindness. Is this universal? Regulated? Since
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In Hanoi i've seen green light color differ slightly across modules, some are green-yellow while others are green-blue (but still not blue as Japan) but still could not find any document about that, do you still remember where did you read about that
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I'm interested in opening a discussion about potentially changing the title of this article to 'traffic signal'. This is the terminology used in transport planning and engineering circles at least in my field.
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Yeah all horizontal traffic light (at least in my country) have red at the end of the horizontal bar and green near the vertical pole
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Garrett Morgan invented the modern 3-way traffic light, yet it is nowhere on this page nor is it linked to his
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I work in the industry and have never heard of this happening. Perhaps it is specific to a certain area or a rumour.
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on 17 September 2016. For the contribution history and old versions of the redirected page, please see
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Just a couple of things I'm curious about; and I imagine there might be more to say on the topic.
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on
Knowledge. If you would like to participate, please visit the project page, where you can join
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wouldn't they have to stare at the lights rather than relying on peripheral vision?
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Standard meanings for traffic lights in the United States (MUTCD, Chapter 4)
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