In the United Kingdom, a red circular sign containing a white horizontal rectangle means no entry.
The sign prohibits vehicles from entering the road or access at the point where it is displayed. It is commonly used to prevent entry into a one-way street from the wrong direction, although it can also control access to restricted areas.
The design is widely recognized internationally because the white horizontal bar resembles a barrier across the route. It is different from a red circle containing a vehicle symbol, which normally prohibits a particular type of traffic rather than all entry.
Drivers sometimes confuse no entry with no through road. A no-through-road sign indicates that a route does not provide a through connection, but it does not by itself prohibit entry. No-entry signs are also different from temporary road-closed signs used during incidents or works.