What types of vehicles are commonly used to transport hazardous materials?

The correct answer highlights the vehicles that are specifically designed or modified to safely transport hazardous materials. Tankers, bulk carriers, and cargo vans are equipped to handle the unique requirements of carrying hazardous substances, which may include special materials to contain spills, climate control for sensitive items, or enhanced safety features to prevent accidents during transportation.

Tankers are designed to carry liquids, such as chemicals or fuels, and often include specialized safety features to minimize spills. Bulk carriers transport solid hazardous materials in a dry form and can be structured to prevent contamination and exposure. Cargo vans, while more general-purpose, can be modified or used in a way that adheres to safety regulations for moving hazardous goods.

The other vehicle types listed do not have the necessary design features or regulations required for safely transporting hazardous materials. Standard pickup trucks might not have the capacity or necessary safety measures, public transportation buses are not intended for transporting hazardous materials, and bicycles and motorcycles lack the required structural integrity and safety features. Therefore, only the combination of tankers, bulk carriers, and cargo vans meets the stringent safety and regulatory standards for hazardous material transportation.