Traffic lights are electronic devices that They emit traffic control signals using lights of different colors, which indicate a specific action as it occurs.
For both drivers and pedestrians, it is essential to know what each color of the traffic light means, since the main intention is to avoid any type of accident.
Red
Red means. The choice of this color is such because it equals danger, drawing the attention of users to stop and wait.
Yellow
The yellow is. It is the color used between green and red, having the characteristic of presenting itself as a flashing light, this way users know that the traffic light is about to change.
Green
Green means. This indicates that the path is clear to advance, being a color that contrasts with red, so there should be no confusion.
Blue?
If you see a traffic light that has blue among its lights, you are probably in Japan, a country where these devices with red, yellow and blue lights are found. In this case, blue replaces green, so it represents exactly the same thing in terms of road and pedestrian traffic, that is, moving forward or crossing.