What type of placard is required for vehicles carrying nonflammable compressed gas?

The correct placard for vehicles carrying nonflammable compressed gas is green. This color specifically signifies that the cargo consists of nonflammable gases that do not present a fire hazard, as opposed to flammable gases which would require a different color designation. The green placard is part of a standardized system used to communicate the nature of the hazardous materials being transported, ensuring safety for responders and those who may come into contact with the vehicle.

In the context of this system, the other colors—white, yellow, and orange—designate different types of hazards or materials and do not apply to nonflammable compressed gases. White typically indicates a division for materials that do not present a specific hazard. Yellow often represents radioactive material, while orange might denote explosive substances. Each color serves a critical role in the quick identification of hazards, which is vital for both safety and regulatory compliance during transportation.