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UK Road Signs

Warning sign

Slippery road sign

Slippery road warning sign: a red-bordered triangle showing a car with wavy skid marks behind it
Sign image: Department for Transport, © Crown copyright

What does the Slippery road sign mean?

Warns that the road ahead may be slippery. Slow down before you reach it and avoid harsh braking, accelerating or steering.

Also known as: Skidding car sign

What it means

The road surface ahead may give less grip than usual, so you are more likely to skid. Adjust your speed before you reach the hazard, not on it.

The symbol shows a car with skid marks behind it. A plate underneath may show how far away the hazard is, or how far it continues.

Less grip means it takes longer to stop and it's easier to lose control. Keep further back from the vehicle in front, and brake, steer and accelerate smoothly.

Where you'll see it

Before a stretch of road where the surface may be slippery. The hazard is usually worse when the road is wet or icy.

Rules to know

  • Skidding is usually caused by braking, accelerating or steering too harshly, or by driving too fast for the road conditions.

    The Highway Code, Rule 119

  • In wet weather, stopping distances will be at least double those needed on dry roads.

    The Highway Code, Rule 227

  • On icy roads, drive at a slow speed in as high a gear as possible, and accelerate and brake very gently.

    The Highway Code, Rule 231

  • A plate under a warning sign can show the distance to the hazard, or the distance over which it extends.

    Know Your Traffic Signs, p. 12

Common mistakes

  • Mistake: Braking hard once you're already on the slippery section.

    Instead: Slow down before you reach it. Skids are usually caused by braking, accelerating or steering too harshly, or by going too fast for the conditions.

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?

Red-bordered white triangle showing a black car with two wavy lines behind it

Full road sign quizzes are coming soon. See what's planned

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.

More warning signs

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Sources

Sign image: Department for Transport, Traffic sign images (diagram 557). © Crown copyright, reused under the Open Government Licence v3.0.

Checked against these sources and reviewed by Bikash Thapa, full UK driving licence holder. Last reviewed 4 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