Correct answer
They identify the hazard posed by the goods.
Transport units carrying dangerous goods must display, on a vertical plane, two rectangular retro-reflective orange panels containing a hazard identification number. The hazard identification number consists of two or three figures and may indicate hazards such as radioactivity or corrosiveness of the transported material.
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They indicate the maximum speed the vehicle can reach.
They indicate the vehicle's maximum authorised mass.
They identify the hazard posed by the goods.
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