A width limit is shown inside a red ring in feet and inches with the metric figure alongside. It applies where a gap, bridge or gateway is too narrow for wide vehicles.
Like height limits it includes any load, including mirrors on some vehicles.
What this sign means
Vehicles wider than the figure shown must not pass. The restriction is often physically enforced by a narrowing or bollards.
It appears at village pinch points, under bridges and at the entrances to residential streets.
What to do when you see it
Judge your width honestly and take the alternative route if in doubt.
- Fold mirrors on a wide vehicle where advised.
- Approach slowly and centre the vehicle in the gap.
- Give way if the gap only takes one vehicle at a time.
- Look for oncoming traffic already committed to the gap.
How this sign is tested
Questions group width, height, length and weight limits together and test that a red ring means prohibition.
Common mistakes
Squeezing through and damaging bollards or mirrors.
Entering the gap when an oncoming vehicle is already committed.
Test yourself on this one
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Practise road sign questionsFrequently asked questions
Does the limit include mirrors?
Where a physical narrowing is fitted, mirrors matter. Always allow clearance.
Are width limits legally enforceable?
Yes. A red ring makes the restriction mandatory.
Who gives way at a narrowing?
Follow the priority arrows if shown, otherwise the driver with the clearer path waits.