indy_cision
indy_cision t1_iy5rim2 wrote
Reply to comment by 2workigo 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]
When it is dark and you driving towards them and cannot see anything other than the one glowing light, how do you know if it is the top or bottom light that is lit if you are red/green colourblind?
indy_cision t1_iy3s06z wrote
Reply to 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]
And now for the missing info. The green is not green, it is a green/blue mix. This is so color blind people can see the difference, especially when driving in the dark (which all of the "green is at the top" people are ignoring - if you are driving at night and can only see the single light, the red and bluey green are still different)
indy_cision t1_iy5ryy0 wrote
Reply to comment by 9600n81 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]
Spoken like someone who hasn't driven in poor visibility conditions or dark enough to not see anything other than a single glowing light...