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➥ Imagine a situation : If people could not see colours, then how would traffic lights work ? Design a traffic system that does not rely on colors.
Answers
Color blindness very rarely means complete monochromatism. In almost all cases, color blind people retain blue–yellow discrimination, and most color-blind individuals are anomalous trichromats rather than complete dichromats. In practice this means that they often retain a limited discrimination along the red–green axis of color space, although their ability to separate colors in this dimension is severely reduced.
Dichromats often confuse red and green items. For example, they may find it difficult to distinguish a Braeburn apple from a Granny Smith and in some cases, the red and green of traffic light without other clues (for example, shape or position). The vision of dichromats may also be compared to images produced by a color printer that has run out of the ink in one of its three color cartridges (for protanopes and deuteranopes, the magenta cartridge, and for tritanopes, the yellow cartridge). Dichromats tend to learn to use texture and shape clues and so are often able to penetrate camouflage that has been designed to deceive individuals with color-normal vision.
Traffic Lights and Color blindness:
Traffic light colors are confusing to some dichromats as there is insufficient apparent difference between the red/amber traffic lights, and that of sodium street lamps; also the green can be confused with a grubby white lamp. This is a risk factor on high-speed undulating roads where angular cues cannot be used. British Rail color lamp signals use more easily identifiable colors: the red is blood red, the amber is yellow and the green is a bluish color. Most British road traffic lights are mounted vertically on a black rectangle with a white border (forming a "sighting board") and so dichromats can look for the position of the light within the rectangle—top, middle or bottom. In the Eastern provinces of Canada horizontally mounted traffic lights are generally differentiated by shape to facilitate identification for those with color blindness
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If people could not see colours, then how would traffic light work. This question is a common query for most of the people who want to contribute society by trying to help blind people. We see that in most of the cases of colour blindness people are prone with not being able to see red and green colour. The design of the traffic system is as follows ::
This new design is according to my opinion which is quite helpful for the colour blind people to detect the traffic lights. This is completely sensor and sound based system. The system consists of wireless audio plug that is to be connected in ears of the person who is colour blind. This wireless audio plug consists of sensors which detect the presence and colour of light. We already are aware of some types of light - based sensors which work in presence of specific type of lights. The most common being the LDR (Light Dependent Resistor) Sensor which works only when it comes in contact with light. A similar type of sensor can be used to detect the colour of light. The audio plug should also have a speaker and in built sound for three colours similar like (Traffic light is '____') where the colour can be programmed. When this sensor detects the colour then it should produce sound like the above statement. On hearing to this sound the person will get aware that what the traffic signal is and he/she can get aware regarding the same. This idea is for the ones who aren't able to see any specific colours.
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★ More to know :-
As already we know that most of the colour blind person are prone to not being able to see red or green colour. So the colours of traffic light shall be changed from Red to Maroon and of Green to Dark Green this will work for the colour blind person of respective colours.