Communicating with Symbols

Today i read about a book that's based on communicating with symbol.It's trying to say you can communicate with every single symbol because it represents something.You can use sign language to communicate with others who have problems hearing.You can tell people what the road is going to be like for example a curve symbol, no trespassing,Restricted areas and a stop sign.Signs guide you and help you when your lost because it'll say how many kmph you can go on the motor-way and telss you were you've been and where you're going.Also if there is a school crossing then there'll be a sign because sings guide you to good and bad places.But there is a choice because people might of turned it around and you might end up lost

Here are some photos of symbols