category 1
Stores or museums may post these signs if they don't want people eating inside the building.
No food allowed.
A teacher might put this sign up in her class because she wants you to focus on what she is saying, not your text messages.
This sign is posted around cliffs, construction sights, or any other place where people may be easily hurt.
Danger.
All building have these signs to help you know which way to go to get out.
Exit
You may see this sign in building or on the side of the road. In buildings they are posted to let people know it is an exit only. Along the road they mean your car cannot go down this road.
Do not enter.
This sign tells you where the bathrooms are
Restroom
Buildings will post this sign if they don't want your furry friends inside.
no pets.
This sign is important for the flow of traffic, especially at four-way stops.
Stop
You can usually see this sign along the side of roads or highways. You look for them when you are hurt and need to go get help
hospital