--- title: "You have driven through a patch of fog but th… | Theory Test" description: "You have driven through a patch of fog but this has now cleared. What should you now do with your front fog lights? The correct answer is “Turn them off whils" lang: en json-ld: | [ { "@context": "https://schema.org", "@graph": [ { "@type": "Organization", "@id": "https://fasttrackdrivinglessons.co.uk/#organization", "name": "Fast Track Driving Lessons", "url": "https://fasttrackdrivinglessons.co.uk/", "email": "info@fasttrackdrivinglessons.co.uk", "areaServed": "GB", "description": "Intensive driving courses and driving lessons across the UK with DVSA-approved instructors." }, { "@type": "WebSite", "@id": "https://fasttrackdrivinglessons.co.uk/#website", "url": "https://fasttrackdrivinglessons.co.uk/", "name": "Fast Track Driving Lessons", "publisher": { "@id": "https://fasttrackdrivinglessons.co.uk/#organization" }, "potentialAction": { "@type": "SearchAction", "target": { "@type": "EntryPoint", "urlTemplate": "https://fasttrackdrivinglessons.co.uk/search?q={search_term_string}" }, "query-input": "required name=search_term_string" } } ] }, { "@context": "https://schema.org", "@type": "QAPage", "mainEntity": { "@type": "Question", "name": "You have driven through a patch of fog but this has now cleared. What should you now do with your front fog lights?", "text": "You have driven through a patch of fog but this has now cleared. What should you now do with your front fog lights?", "answerCount": 1, "acceptedAnswer": { "@type": "Answer", "text": "Turn them off whilst visibility remains good. You must switch off your fog lights as soon as visibility improves. Leaving them on when the road is clear is illegal because high-intensity lights dazzle other road users and can obscure your brake lights. Flashing your fog lights or keeping them on just because other drivers do is unsafe. The Highway Code states you must only use fog lights when visibility is seriously reduced, which generally means less than 100 metres." }, "suggestedAnswer": [ { "@type": "Answer", "text": "Leave them on, it may become foggy again" }, { "@type": "Answer", "text": "Flash to warn oncoming traffic of the fog" }, { "@type": "Answer", "text": "Leave them on if others do too" } ] } } ] --- Get an exclusive 15% off - Offer ends next week! 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DVSA-style practice question · Vehicle Handling ## The answer options - Leave them on, it may become foggy again - Turn them off whilst visibility remains good**Correct** - Flash to warn oncoming traffic of the fog - Leave them on if others do too ## Why that is the answer You must switch off your fog lights as soon as visibility improves. Leaving them on when the road is clear is illegal because high-intensity lights dazzle other road users and can obscure your brake lights. Flashing your fog lights or keeping them on just because other drivers do is unsafe. The Highway Code states you must only use fog lights when visibility is seriously reduced, which generally means less than 100 metres. ## How this comes up in the real test Questions from vehicle handling appear throughout the 50-question multiple-choice section, and the wording changes between versions. Learn the rule rather than the sentence: the DVSA can ask the same point from the opposite direction, and a memorised answer falls over the moment the phrasing moves. The pass mark is 43 out of 50, so seven wrong answers is your entire margin. If a whole category is shaky, run the topic practice below until you are getting every question right for the right reason, then go back to full mocks under the clock. [Practise Vehicle Handling](/theory/quiz/vehicle-handling)[Sit a full mock test](/theory/mock-test) ## More vehicle handling questions - [A lot of snow has fallen recently. When driving in these conditions, what are some things to think about?](/theory/questions/a-lot-of-snow-has-fallen-recently-when-driving-in-these-conditions-what-are-some-things-to) - [After fog has cleared, it can be dangerous to leave your rear fog lights switched on. What is the reason for this?](/theory/questions/after-fog-has-cleared-it-can-be-dangerous-to-leave-your-rear-fog-lights-switched-on-what-i) - [What colour are the reflective studs along the left-hand edge of the motorway?](/theory/questions/what-colour-are-the-reflective-studs-along-the-left-hand-edge-of-the-motorway) - [During the day, when should dipped headlight be used?](/theory/questions/during-the-day-when-should-dipped-headlight-be-used) - [How can you regulate your speed with the engine of your car?](/theory/questions/how-can-you-regulate-your-speed-with-the-engine-of-your-car) - [How should you deal with this hazard?](/theory/questions/how-should-you-deal-with-this-hazard) ## Ready to book the real thing? Full Membership is £49 and covers your DVSA booking, one resit with no minimum mark, cancellation checking on theory and practical tests, and the Learning Hub. [Book my theory test](/theory/signup) ## Passed your theory? 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