Which type of vehicle is typically used to transport hazardous materials?

Tank trucks or box trailers are specifically designed for the safe transportation of hazardous materials, making them the most suitable choice for this type of cargo. Tank trucks have a cylindrical design that allows for the secure containment of liquids and gases, minimizing the risk of spills or leaks. Their construction often includes features such as reinforced walls and specialized valves, which enhance safety during transport.

Box trailers, on the other hand, are utilized to carry solid hazardous materials or packaged goods that need protection from external elements. These trailers can be equipped with special handling equipment and shelving to keep hazardous materials secure and properly organized.

While open bed trucks, vans, and pick-up trucks may be used for transporting a variety of goods, they do not offer the specialized containment and safety features necessary for hazardous materials. Such vehicles can expose the materials to the elements or result in unsafe spillage, which is not acceptable when dealing with dangerous substances. Therefore, the correct answer emphasizes the importance of using purpose-built vehicles for the transportation of hazardous materials to ensure compliance with safety regulations and the protection of public safety.