Warning sign
Overhanging building sign
What does the Overhanging building sign mean?
A plate under a headroom warning, showing that the low headroom is caused by an overhanging building or structure.
Also known as: Overhanging structure plate
What it means
Reduced headroom ahead is due to an overhanging building.
The plate goes under the maximum headroom warning triangle. It shows that the low headroom comes from an overhanging building or structure, not a bridge.
'Building' may be varied to 'buildings' or 'structure'.
Where you'll see it
Under headroom warnings near buildings that overhang the road.
Rules to know
Where reduced headroom over a road is due to an overhanging building or structure, a plate may be added below the warning triangle ('building' may be varied to 'buildings' or 'structure').
Know Your Traffic Signs, p. 26
Common mistakes
Mistake: Assuming only bridges are low.
Instead: Buildings can overhang the road too. Check the headroom.
Test yourself
Recalling the answer helps it stick. Pick an answer to see how you did.
Question 1 of 1
What does this sign mean?
Ready for more? Take the Warning Signs Quiz
Download this sign
© Crown copyright. Free to reuse under the Open Government Licence v3.0, as long as the sign is reproduced accurately and not in a misleading context.
Related signs
Used with
Maximum headroom
Warning sign
The warning triangle the plate goes under.
More warning signs
All warning signs
Share this sign
Pinterest (opens in a new tab)Facebook (opens in a new tab)X (opens in a new tab)WhatsApp (opens in a new tab)EmailSources
- Know Your Traffic Signs (Department for Transport, Sixth edition, 2023), Low bridge signs, p. 26
Sign image: Department for Transport, Traffic sign images (diagram 530.1). © Crown copyright, reused under the Open Government Licence v3.0.
Last reviewed 11 October 2026. This page explains the sign in our own words; for the full rules, see The Highway Code. How we source and check content