Why must placards be visible from all four sides of a placarded vehicle?

Pick an answer

1. This requirement exists purely for aesthetic symmetry
2. Placards are only legally required on the front of the vehicle
3. Responders or others may approach from any direction and need to identify the hazard regardless of viewing angle
4. Four-sided placarding is only required for tank vehicles, not dry vans or flatbeds carrying the same material

Correct!

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