Correct answer
Auto yellow (amber).
Auto yellow (amber), using a device approved under UN Regulation 65 and visible in all directions. Do not confuse it with a white work lamp illuminating an operation or the blue signal of a priority vehicle. V-2 need not use a rotating mechanism: the requirement is a compliant approved warning device. Its use depends on the specified activities and circumstances, not on every tractor always having it switched on.
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Steady red.
Blue.
Auto yellow (amber).
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