4 ms·
Related, why in Japan they use blue for semaphore lights https://steemit.com/science/@tendenciaglobal/why-japan-has-no-green-light-at-their-traffic-lights-and-h
by makz 5y ago
Related, why in Japan they use blue for semaphore lights https://steemit.com/science/@tendenciaglobal/why-japan-has-no-green-light-at-their-traffic-lights-and-how-they-know-when-to-cross https://steemit.com/science/@tendenciaglobal/why-japan-has-n...
- throw0101a 5y agoGiven the relative prevalence of red-green colour blindness this is probably a general good idea.