Prohibition signs: how to read the red circle

Many circular signs with a red border indicate a restriction. The symbol, supplementary plates and position of the sign determine how it applies.

The border warns of a restriction

A red-bordered circle is a common shape for prohibition signs. Depending on the symbol, it may prohibit entry, a turn, overtaking, parking or the passage of certain vehicle categories. The colour alone does not tell you the exact rule: read the central symbol and any wording or supplementary plates. Do not confuse a prohibition sign with a triangular warning sign or a blue mandatory sign.

When you see the sign, check whether it includes a vehicle category, a weight, a time or a distance. A plate may state that the restriction applies at certain times, concerns residents or authorised vehicles, or begins further ahead. The sign’s position in relation to a junction may also matter. If you cannot read it clearly, slow down and do not carry out the manoeuvre until the restriction is clear.

• Read the symbol, not just the red border.
• Take account of times, vehicle categories and distances on supplementary plates.
• Follow the restriction until an end sign or the stated condition applies.

National rules and local orders

Some restrictions are set by the Highway Code and its regulations; others may be introduced by local orders for a road or area. The sign on site communicates the applicable rule and must be read with any supplementary plates. For example, access to a restricted traffic zone may depend on the local council’s hours, permits and procedures. Do not assume you may enter because a similar vehicle has done so.

If you receive a penalty and want to challenge it, keep the notice, the sign’s location and relevant evidence, and observe the stated deadlines. A general explanation of a sign cannot determine whether a specific penalty is valid. For practical questions about traffic arrangements, the road owner or local police can tell you which order applies.

Learn to read the whole sign

A restriction may begin where the sign is placed or be indicated in advance by a supplementary plate; also check for end signs. Before entering an urban area, check the council’s rules and permits, especially for restricted traffic zones or reserved lanes. A sat-nav may not know about temporary exemptions or personal authorisations. If you have a permit, check that it is linked to the vehicle registration and valid at the stated time; do not assume access is allowed just because a barrier is open.

Quiz Patente Ufficiale lets you revise signs by chapter, take timed quizzes and review your mistakes.