The Danger Signs
Danger warning signs are usually diamonds and triangle. They are generally classified into Aa (triangles) and Ab (diamonds). Those coded with Aa have white backgrounds, black symbols and red borders. Ab or the diamond shaped have yellow backgrounds, black borders and black symbols. Some warning signs also have flashing yellow light to call more attention. If there is an exclamation on the sign, it means it is a general danger. However, if there is an additional panel, it means exact danger. In some countries, words are placed on the signs.
