It means that the vehicle is carrying Hydrochloric Acid.
If you mean a diamond on the lane, that means that that lane is for BICYCLISTS ONLY, if you mean as a shape of a sign such as a "slippery when wet" sign, that usually tells you important things. I looked it up in my "Virginia Driver's Manual" and it says a diamond shaped sign is a warning sign.
1789 when james madison sign the constitution so in 1789
it means that the chemical or substance is poisonous
a lemon doesent have a hazard sign because it is a natural thing
warning sign...warning you of road hazards or upcoming objects. There is diamond type symbol found on the seals found from pre-historic Harappan Civilization in South Asia. the decrypted text shows it as a sign of currency.
The flammable sign was standardized by the National Fire Protection Association (NFPA) in the late 1940s. The NFPA developed a system of labeling flammable materials with a red diamond symbol to alert people to the fire hazard.
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I think the "Fallout Shelter" sign
bhenchod
Size of the sign
The hazard symbol for copper sulphate is a white diamond with a skull and crossbones and the letters "T+" inside, indicating it is highly toxic. It also has the symbol "Harmful if swallowed" underneath.
it means you need to charge it and fast or your battery will be SHOT!