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My work
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The back area of the shop I work at has R&D stuff which includes traffic signal equipment. On the bench is a Case Sign with "NO TURNS" on all four sides. LEDs are being developed to replace the flourescent lights in them. Which is funny because alot of the newer intersections with case signs dont have wire strung to the sign. They are always dark. Low Quality Picture taken with my phone.
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Some of the newer case signs are thinner too.