What is the minimum size requirement for placards per side?

The correct answer indicates that the minimum size requirement for placards per side is 9.84 inches. This measurement is based on the regulations set forth in the Hazardous Materials Regulations (HMR), which dictate how hazardous materials should be identified during transport. The size of 9.84 inches is specifically chosen to ensure that the placards are visible from a distance, enabling emergency responders and personnel to quickly identify the type of hazardous material being transported.

This size not only enhances visibility but also adheres to international standards for hazardous materials transport, providing consistency across different modes of transportation. Adopting this specific measurement helps promote safety by ensuring that everyone involved in the transport and handling of hazardous materials can easily recognize and understand the risks associated with the materials just by observing the placard from afar.