What is "if you see this sign on a two-lane road?

Okay, I need more information! "This sign" is not specific enough. I need to know what the sign looks like or what it says to give you information about it. For example, tell me:

• What are the shapes and colors of the sign?
• What symbols are on it?
• What text does it contain?

Once I have a description of the sign, I can provide the information you requested.