Warning sign
Arch bridge: high vehicles use middle sign
What does the Arch bridge: high vehicles use middle sign mean?
At an arch bridge, high vehicles must use the middle of the road, where the arch is highest. Give way to them.
Also known as: Arch bridge plate
What it means
High vehicles should use the middle of the road under the arch.
The headroom under an arch bridge is greatest in the middle. Road markings guide high vehicles through the highest part.
Drivers of all vehicles should give way to oncoming high vehicles in the middle of the road when there is not enough room to pass.
Where you'll see it
At arch bridges with limited headroom at the sides.
Rules to know
Road markings guide high vehicles through the highest part of the arch. Drivers of all vehicles should give way to oncoming high vehicles in the middle of the road when there is insufficient room to pass.
Know Your Traffic Signs, p. 26
Common mistakes
Mistake: Not giving way to a high vehicle coming through the middle.
Instead: Wait for it: it needs the highest part of the arch.
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© 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 sign for the headroom.
See also
Overhanging building
Warning sign
Another low-headroom plate.
More warning signs
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- Know Your Traffic Signs (Department for Transport, Sixth edition, 2023), Low bridge signs, p. 26
Sign image: Department for Transport, Traffic sign images (diagram 531.2). © 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