Your vehicle has anti-lock brakes. In which conditions may they be ineffective at preventing skidding?

Explanation: In very wet weather, water can build up between the tyre and the road surface. As a result, your vehicle rides on a thin film of water and your tyres won't grip the road. Gravel or shingle surfaces also offer less grip and can cause problems when braking. An anti-lock braking system may be ineffective in these conditions.

Category: Band 2 traffic signs and signals

References: The Official DVSA Guide to Driving: Section 5, Highway Code: Rule 120