Toes14 t1_iy4trl9 wrote
Reply to comment by Fred2718 in Eli5 why do traffic lights have red, yellow and green color? Why not use other colors so that even colourblind people can drive. by [deleted]
I didn't say that the more that the horizontal layout wasn't used. But in the United States, stop lights that are laid out horizontally always have green on the right.
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