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color blindness people has difficulty to tell to the color. Therefore, an approach to overcome this issue to use the brightness and darkness of the color to tell message of the signal the difference instead of just the variety of color to show the direction. Our design concept is to use the difference of light brightness and darkness to replace pure use variety of colors to tell the difference of the traffic signal representative control. Therefore, the color blindness will be easy to distinguish the traffic light signal by the light brightness degree. However, The majority of people wont have trouble to tell the signal as well, so it will