A notice and sign would be two details from placard.
What is the importance of placards?
A placard, also known as a little card, sign, or plaque, is a message that is posted in a public area. It can be hung from or affixed to a structure or vehicle to display details about the building or vehicle's occupants or contents.
It can also refer to notices or signs made of paperboard that picketers or protesters carry.
The sort of risk that the hazardous substance being delivered poses is identified on placards. They are a crucial part of a global system of hazard notification that also includes specifications for shipping paper, package marking, and labelling.
A poster or notification intended for public exhibition. 2. a little plaque or card. transitive verb.
