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RestrictOnTheHanger

Flashing yellow diamond

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A few minutes ago I spotted a number of new fixtures (for lack of a better word) in the s/b tunnel between 7 ave/53rd St and 50 st on the (E). On each of the fixtures were 2 large yellow LED diamonds, and one of the diamonds was flashing on each fixture. 

Is this some sort of new signal that is being tested?

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