What does this picture mean?

It's a Shoshinsha mark or wakaba mark that is a green and yellow V-shaped symbol that new Japanese drivers must display on their cars for one year. Conversely, the orange and yellow "fukushi mark" or "kareha mark" denotes elderly drivers. Both marks are designed to warn other drivers that the marked driver is not very skilled, either due to inexperience or old age. However, in the North American scene, these badges are placed on the back of vehicles for a JDM look as a form of fashion.