What must vehicles carrying explosives have?

• A. Placards on all four sides that read '1.1D' and two fully charged B/C type fire extinguishers mounted on the vehicle.
• B. Placards on all four sides that read '1.1D.' Be in compliance with DOT and all local regulations, and two fully charged B/C type fire extinguishers mounted on the vehicle.
• C. A single placard reading '1.1D' on the rear of the vehicle and no extinguishers required.
• D. Placards on all sides reading '2.0' with three extinguishers.

Answer: (B)

Vehicles carrying explosives must clearly communicate the hazard to anyone who might respond in an emergency and follow strict safety rules. The best approach is to have placards on all four sides of the vehicle displaying the correct hazard class and division, here 1.1D, so the danger is visible from every angle. In addition, the shipment must be in compliance with DOT and local regulations, which cover placarding, routing, shipping papers, and other safety requirements. To handle potential fires during transport, two fully charged B/C type fire extinguishers should be mounted on the vehicle. This combination provides clear hazard communication, regulatory compliance, and practical emergency readiness. The other options fall short by misplacing placards, using the wrong hazard class, or omitting or misrepresenting required extinguishers.