Sign

We will talk about some sign's meaning.
1. What is this mean?

It means you cannot use the bicycle here.
Usually, there is this sign on the pavement.






2. What is this mean?

It means you should park back in parking only.
Usually, there is this sign at parking lot.






3. What is this mean?

It means please donnot touch this.
Usually, there is this sign at the elevator or dangerous things.






What else other sign? If you know others, please tell me this time.

Thank you~