Where should safety marks be placed on the truck if they are required to warn of the presence of risky goods?

• A. On the front of the lead trailer
• B. At the end of the trailer or transport unit
• C. On the side of that will be most visible to other vehicles
• D. On each side and each end of the trailer or transport unit

Answer: (B)

Placing safety marks where they will be seen by other road users is essential, and the most effective location for warning drivers behind you is at the end of the trailer or transport unit. This rear-facing placement ensures that following vehicles notice the hazard as you travel, which is the primary purpose of the marks. Front or side placements can be obscured or less visible to traffic behind you, so the end position directly fulfills the requirement for clear rear visibility.