The title tells you 2 things. First, don’t worry about the color (be Color Blind), and second, be “blind”
Notice that the stoplights are separated in a grid. You’ll need to look close. That separation is important.
The stoplights are separated into groupings that have 2 columns of 3 rows. Look for something that uses 2 columns of 3 rows to represent letters.
Difficulty 
A little puzzle to pass the time while sitting at a stop light. No, seriously, you shouldn’t be doing this in the car if you are driving.
Please DO NO POST THE ANSWER.
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That is the correct answer.
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Sorry. That is not the correct answer.
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Well it’s not quite that easy. But your thinking is sound.
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Puzzle published 3/24/2020. Enjoy!