Talk:Traffic light

3-way traffic light: History Section

Garrett Morgan invented the modern 3-way traffic light, yet it is nowhere on this page nor is it linked to his Wikipedia page. Domme2040 (talk) 18:06, 3 July 2023 (UTC)

@Domme2040 then add it Jèrriais janne (talk) 21:13, 8 September 2023 (UTC)

simple traffic lights

description 136.158.103.107 (talk) 00:42, 11 October 2023 (UTC)

Title breaks if table is hidden

Standard meanings for traffic lights in the United States (MUTCD, Chapter 4) 83.168.137.1 (talk) 00:38, 14 January 2024 (UTC)

Colorblindness

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 when?

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, wouldn't they have to stare at the lights rather than relying on peripheral vision?

Just a couple of things I'm curious about; and I imagine there might be more to say on the topic. SSSheridan (talk) 10:10, 23 February 2024 (UTC)

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 blueish-green?

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 Stvk Công Cuối (VN) (talk) 16:13, 26 August 2024 (UTC)

I work in the industry and have never heard of this happening. Perhaps it is specific to a certain area or a rumour. Takerlamar (talk) 22:49, 27 August 2024 (UTC)

Terminology - traffic light vs. traffic signal

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.

I'm aware this may brush up against WP:COMMONNAME. But I think the spinoff terms from this - e.g. 'signal phasing', 'signal controls', etc. - lend themselves to the main article being aligned to these. Takerlamar (talk) 04:03, 6 June 2024 (UTC)