Where must a commercial motor vehicle transporting hazardous materials display placards?

A commercial motor vehicle that is transporting hazardous materials is required to display placards in a specific manner to ensure safety and compliance with regulations. The correct answer, which states that placards must be displayed on the front, rear, and both sides of the vehicle, reflects the need for visibility from all directions. This requirement ensures that emergency responders and other motorists are adequately warned of the hazardous materials being transported.

The placement of placards on all sides of the vehicle is crucial for effective communication. In the event of an accident or emergency, having placards visible from multiple angles can help emergency personnel to quickly assess the situation and determine the necessary precautions to minimize risk. This visibility is not only a regulatory requirement but also a vital safety measure that informs others of the potential dangers that the vehicle may pose.

Consequently, proper placarding enhances situational awareness and aids in the safe handling of hazardous materials during transport, clearly demonstrating why the option for requiring placards on the front, rear, and both sides is the correct answer.