How do guide dogs distinguish between traffic lights? Let’s find out

Guide dogs are actually "color blind". In their eyes, the world is black, white and gray. There is only a difference in the brightness of black and white, but they cannot have colorful colors.

In addition to being able to see black and white, guide dogs can actually feel long-wave red and yellow light and short-wave blue light, but they cannot see it. As for green light, guide dogs cannot recognize it, so guide dogs cannot actually distinguish between red and green. The reason why guide dogs can learn to see traffic lights is because guide dogs have strong photosensitivity and can distinguish different levels of colors by relying on the brightness of the light, instead of directly distinguishing traffic lights by distinguishing red and green light.

In addition, if there are pedestrians at the intersection and most people choose to pass, the guide dog will convey a passable signal to the owner, and will move forward after receiving feedback. Otherwise, it will continue to wait. Moreover, the trained guide dogs will also observe the traffic flow on their own and confirm whether there are any obstacles in the passing direction when there are no pedestrians around. Therefore, in order to make guide dogs and their owners safer, pedestrians should also give them a helping hand. They should not run red lights in a "Chinese style" of crossing the road, and they should be courteous to disabled people when they see them while driving.