Icing Road Warning  Signals are graded into three levels: yellow, orange and red.

                 a）Icing Road Warning  Yellow Signal

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Meaning: The icing road may affect traffic in 12 hours.

                  b）Icing Road Warning  Orange Signal

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Meaning: The icing road may affect traffic severely in 6 hours.

                   c）Icing Road Warning  Red Signal

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Meaning: The icing road may affect traffic very severely in 2 hours.