Vehicle markings

Spontaneously combustible substance

What does this vehicle marking mean?

A diamond plate identifying a substance that can ignite without an external source of heat or flame. Damage to the packaging or exposure to air can be enough to start a fire, which is why a collision involving this class is treated so seriously. Do not attempt to move packages or open containers under any circumstances. Move people away and upwind, then call for help.

Highway Code references

• Rule 284 from Breakdowns and incidents (275 to 287)

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