Practice question

What does tunnel category A mean for dangerous-goods traffic?

  1. No ADR tunnel restriction; there is no extra panel letter on the prohibition sign
  2. All dangerous goods are banned, including UN 2919 special arrangements
  3. Only Class 9 may pass, and only at night
  4. The tunnel is reserved for tanks of petrol

Answer: A — No ADR tunnel restriction; there is no extra panel letter on the prohibition sign

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