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Briefly use the hazard warning lights
Switch on the hazard warning lights continuously
Switch on the headlights continuously
Briefly use the rear fog lights
Explanation: The only time you are permitted to use your hazard warning lights while moving is if you are on a motorway or dual carriageway and you need to warn other road users, particularly those behind, of a hazard or obstruction ahead. Only use them long enough to ensure your warning has been seen.
Category: Hazard Awareness
References: The Official DVSA Guide to Driving: Section 3, Highway Code: Rule 116
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