The prohibition signs forbid a certain action. They indicate certain actions that users are not allowed to do.
“No entry” signs. These are “No admittance” signs to unauthorised personnel, usually shown as a red circle with a white rectangle across its face.
“Wrong way” signs. These signs indicate that one should not go beyond the sign-in that direction where the sign is placed.
“Road closed” signs. These signs can be used on roads, in complexes, parks, schools, on co, etc where