What is the most common type of trailer used for transporting hazardous materials?

The most common type of trailer used for transporting hazardous materials is the tanker. Tankers are specifically designed to carry liquids, including hazardous substances like chemicals and fuels, and are equipped with safety features to handle the risks associated with transporting such materials. These trailers are built to minimize the risk of spillage and contamination, making them suitable for hazardous materials transport.

In contrast, flatbed trailers, box trailers, and reefers are not designed for transporting liquid hazardous materials. Flatbeds are generally used for heavy equipment and goods that can withstand exposure to the elements, while box trailers are suitable for dry goods and do not offer the containment necessary for liquids. Reefers, or refrigerated trailers, are utilized primarily for transporting perishable food items that require temperature control, not typically for hazardous materials. Therefore, tankers remain the most appropriate and frequently used option for this purpose.