Risk of grounding sign

What it means

Long low vehicles may ground on a humped crossing ahead.

The picture shows a low vehicle stuck on a hump in the road. It warns that long, low vehicles may be at risk of grounding, usually at a level crossing.

Drivers of such vehicles must phone the signal operator before crossing, using the phone provided.

Where you'll see it

On the approach to level crossings with a humped road surface.

Rules to know

• Long low vehicles may be at risk of grounding. Drivers of such vehicles must phone before crossing.

  Know Your Traffic Signs, p. 29

• At automatic level crossings, drivers of large or slow vehicles must phone before and after crossing.

  Know Your Traffic Signs, p. 29

Common mistakes

• Mistake: Assuming it only matters for lorries.

  Instead: Any long low vehicle, such as a low-loader or a car transporter, can ground on a hump.

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?

• AFrail pedestrians likely to cross
• BTraffic may be queuing ahead
• CLong low vehicles may ground at the crossing
• DTest your brakes

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