series of lights red green amber indicating a machine operation

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Size: 4912px × 5904px
Photo credit: © robert hyrons / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: amber, authority, control, danger, electric, equipment, forbidden, front, green, horizontal, image, isolated, light, lighting, multiple, orange, people, red, regulate, row, safety, sequence, sign, stoplight, stree, street, view, warning, white