The 'End of Dual Carriageway' sign (520) warns you that the road ahead will revert to a single carriageway. This sign is crucial for safety as it often precedes changes in road layout, potential hazards, or different traffic flow. You should use the advance warning to smoothly reduce your speed, increase your observation, and prepare for the road ahead, which might involve different traffic merging or priority arrangements. This sign is part of the UK's suite of warning signs designed to give drivers sufficient time to adapt.
Prepare for the change in road conditions with this essential warning sign. Master its meaning for your theory test revision and safe driving practice on Great Britain's roads.
This warning sign is used before a hazard or road feature that may require an earlier response than the driver would otherwise make. Its purpose is to give enough time to reduce speed smoothly, increase observation, and avoid sudden braking or steering. The correct practical response depends on the exact location, traffic level, visibility, road surface, and whether pedestrians, cyclists, animals, or crossing traffic may be present. It is listed in the catalogue as code 520.
"End of dual carriageway" gives advance warning of end of dual carriageway. It tells the driver to look further ahead, manage speed early, and prepare for a possible change in priority, road position, visibility, or stopping distance.
Get clear, practical answers to the most common questions about the 520 - End of dual carriageway road sign. Learn how the sign works, what rules it represents, and how it affects real driving situations. This FAQ strengthens your understanding and supports accurate decision making for the British driving theory exam in Great Britain.
The 'End of Dual Carriageway' sign (520) is a warning sign that alerts you that the separated lanes of a dual carriageway are about to merge into a single carriageway. It's an early cue to prepare for this change.
When you see sign 520, you should ease off the accelerator early and begin to adjust your speed smoothly. Increase your observation by checking mirrors and scanning ahead and to the sides. Prepare for potential changes in road layout, traffic flow, or priority.
There isn't a mandatory speed limit change dictated solely by this sign, but the warning implies you should reduce your speed safely and smoothly well before the actual end of the dual carriageway. Your exact speed should depend on visibility, traffic, and road conditions.
A common trap is treating this sign as a last-minute alert. Learners might fail to start slowing down early enough, leading to abrupt braking or poor lane positioning. Always remember this is an advance warning, giving you time to prepare proactively, not reactively.
Yes, absolutely. Supplementary plates or road markings can provide additional information about the distance to the end of the dual carriageway or indicate specific actions required, such as merging directions. Always pay attention to these alongside the main sign.
A clear reference image of the 520 - End of dual carriageway road sign used in Great Britain.

The 520 - End of dual carriageway road sign may also be known by these alternative names or terms.
The 520 - End of dual carriageway road sign is part of the Great Britain Warning Signs category, which groups together signs with similar rules and functions.
Compare this 'End of dual carriageway' sign with similar traffic signs to solidify your understanding and improve recall for the theory test. Effective sign recognition and traffic sign comparison are key to successful revision and safe driving.

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After reviewing the full list of road signs, challenge yourself with practice questions focused specifically on sign recognition. Reinforce your learning and ensure you're fully prepared to identify and understand all traffic signs on the DVSA theory test.
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